Answers
Recent research indicates that the duck-billed mammal is not as common as once believed, in part because of decades of hunting and habitat destruction.
One of the most adored animals in Australia is the platypus, which also appears to be one of the most hardy.
The odd duck-billed mammal with webbed feet was visible frequently enough that there was little need to worry about its population during the 20th century, even while many of the native animals of the continent decreased or vanished. Until researchers started to understand the freshwater creatures weren't healthy and possibly hadn't been all along.
Tahneal Hawke, a Ph.D. candidate at the University of New South Wales and a researcher with the Platypus Conservation Initiative, claims that "the platypus has declined right in front of our noses."
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QUESTION - Which of the following would best aid the platypus population, given the factors that are causing their decline?
Related Questions
Which sentence explains how the regular arrangement of strongly bonded
monomers relates to cellulose's function in an organism?
OA. It allows the molecules to attach to foreign bodies and mark them
for destruction.
B. It allows the molecules to provide strength to leaves, stems, and
trunks.
OC. It allows the molecules to store a lot of information.
OD. It allows the molecules to provide insulation for internal body
parts.
Answers
Most macromolecules are made from single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
What is cellulose's function?
Cellulose is a natural polymer made of smaller sugar units. It is present in cell walls of plant cells. It gives remarkable strength to the cell. It also helps in the absorption of water thus, preventing desiccation of cell.Cellulose is a major component of plant cell walls, and is the world's most abundant biopolymer. Cellulose contains apparently simple linear chains of glucose residues, but these chains aggregate to form immensely strong microfibrils.The cellulose molecules provide tensile strength to the primary cell wall. Each molecule consists of a linear chain of at least 500 glucose residues that are covalently linked to one another to form a ribbonlike structure, which is stabilized by hydrogen bonds within the chain .To learn more about molecules refers to:
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Answer:
the answer is b
Explanation:
i just took the test
what are some causes of the background and mass extinction
Answers
Some causes of the background are; Gradual environmental change, Predation, Genetics, and causes of mass extinction are; Catastrophic events, environmental change, Oceanic changes, and Human activities.
Causes of background extinction; Changes in the environment, such as climate change or geological events, can cause slow, long-term changes that make certain species less adapted to their environment.
The introduction of new predators or changes in predator-prey relationships can also lead to the extinction of some species.
Genetic factors can play a role in the extinction of species, particularly in small populations where genetic diversity is low.
Causes of mass extinction; Mass extinctions can be caused by catastrophic events, such as asteroid impacts, massive volcanic eruptions, or global climate change.
Rapid changes in the environment, such as sudden climate change or sea level change, can cause species to become extinct.
Changes in the ocean, such as ocean acidification or anoxia, can lead to the extinction of marine species.
Human activities such as overhunting, habitat destruction, pollution, and introduction of invasive species can also contribute to mass extinction events.
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how are elements in the group in the periodic table alike?
Answers
Many scientists oppose offshore drilling. Since the 1970s there have been several devastating oil spills as a result of oil exploration and drilling: Ixtoc, Exxon Valdez and, most recently, the Deepwater Horizon blowout off the coast of Louisiana. Ecosystems may survive, and some may eventually recover from such oil spills. But the overall effects are far reaching and long lasting. Scientists still see the effects of the toxic spill on the crab populations in surrounding wetlands. Others argue that the effects of not drilling are just as harmful. But, rather than ecosystems, it harms the economy. If we can drill our way out of poverty, then we owe it to ourselves to do so. In addition to this, it is put forth that reliance on foreign oil leads to the entrenchment of hostile regimes in oil rich regions. Extensive research along the Gulf Shore has uncovered a rise in cancer rates directly linked to consumption of seafood contaminated by the Deepwater Horizon blowout. How are the pro-drilling and anti-drilling arguments affected by this discovery?
A It weakens the anti-drilling argument and weakens the pro-drilling argument
B It is impossible to say how this evidence will impact either argument.
C It supports the anti-drilling argument.
D It supports the pro-drilling argument.
Answers
Offshore drilling, in actuality, carries significantly greater environmental danger than benefit. Utilizing these fuels and burning them results in significant carbon emissions and climate change. Thus, option B is correct.
What are the causes of offshore drilling?The impacts and dangers of human offshore oil and gas development, which include extensive onshore habitat loss.
Frequent oil spills, the release of toxic drilling muds, a potentially catastrophic oil spill, and direct harm to marine mammals during exploration, are in no way comparable to the seepage of tar that occurs naturally.
Therefore, The majority of accidents involving offshore oil rigs are caused by blowouts. Natural calamities continue to be a risk, but faulty machinery and structural flaws are a key factor in drilling rig mishaps.
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What causes waves to form....tides pull the water upward but what moves the waves side to side.
A Wind and boats
B Heat and water
C Gravity and Water
D Wind and gravity
Answers
Helppppppppppppppoo meeeeeeee
Answers
2, 3, 1, 4, 5, 6
Good luck I hope this helped!
What is the difference between the rough and smooth endoplasmic reticulum?
Answers
Answer & Explanation:
The most basic difference between RER and SER is the presence of ribosomes. When ribosomes attach to the surface of an ER, it gives a characteristic rough appearance; hence it is called Rough ER. On the other hand, a smooth ER does not have ribosomes on its surface. It possesses ribosomes attached to its membrane.
(HELP) After crossing-over as shown below, what would be the sequence of the alleles on each chromatid?
(See attachment below)
A. ABDE, aBdE, abDe, Abde
B. ABDE, aBde, abDE, Abde
C. ABdE, ABDE, abde, AbDe
D. ABDE, aBDe, abde, Abde
Answers
Answer:
B) ABDE, aBde, abDE, Abde
Explanation:
STUDY ISLAND
what is the meaning of involuntary action
Answers
Involuntary actions is when something happens unintentionally or without a person's conscious control, it is said to be occurring involuntarily
What is Involuntary actions?When something happens unintentionally or without a person's conscious control, it is said to be occurring involuntarily. Usually, the autonomic nervous system or reflexive reactions control these actions.
In contrast to voluntary acts, which may be controlled consciously, involuntary actions occur without conscious thought or intentional decision-making.
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what biomes are found in south africa
Answers
Which would be the most appropriate way to represent a prominence in a model of the sun?
(1 point)
O a loop of wire extending from the sun's surface
O a feather extending away from the sun's surface
a layer of smoke on the sun's surface
O a dark spot on the sun's surface
Answers
The most appropriate way to represent a prominence in a model of the sun is using a layer of smoke on the sun's surface.
The correct option is C.
What is prominence in the sun?A prominence in the sun also known as a filament when viewed against the solar disk is described as a large, bright feature extending outward from the Sun's surface.
Prominences are anchored to the Sun's surface in the photosphere, and extend outwards into the Sun's hot outer atmosphere, called the corona.
The appearance of the prominence of the sun is either as a flame-colored projections when the disk of the Sun is in total eclipse or as dark ribbons when viewed through a spectroscope.
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the average hair skin and nails have a pH level of five generally falling between 4.5 and 6 true or false
Answers
Hair and nails are made up of a tough protein known as keratin.
The pH of hair and nails is slightly acidic.Hair, skin, and nails have a pH of approximately 5.5.Hair functions to keep the body warm while the nails act as protective plates for the fingertips.Hence, it can be said that the average pH of the hair and skin lies between 4.5 and 6. Hence, the given statement is true.
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1.
Earth's axis slowly but continuously points in different directions, a movement known as
O revolution
O retrograde motion
O rotation
O precession
Answers
Answer:
revolution
Explanation:
I got it correct
What was the climate like prior to the extinction ?
Answers
Answer:
The extinction you are referring to is unclear, as there have been several mass extinctions throughout Earth's history. However, it is generally accepted that climate has played a significant role in many of these events. Prior to some of the mass extinctions, such as the Permian-Triassic extinction and the Cretaceous-Paleogene extinction, the climate was warm and tropical with high levels of carbon dioxide in the atmosphere. This warm climate was likely a contributing factor to the extinction, as it may have led to changes in sea level, ocean circulation, and weather patterns that disrupted ecosystems and caused widespread extinction of species. However, it is important to note that climate is just one of many factors that can contribute to mass extinction events, and there are often multiple causes involved.
Ostriches (birds) and giraffes (mammals) are both native to the savannahs of Africa. They eat food that is high off the ground and share the same characteristic of an elongated neck. Which pattern of evolution is being described?
Answers
The pattern of evolution being described here is convergent evolution, where two unrelated species develop similar characteristics due to their adaptation to similar environments or ecological niches.
Convergent evolution explained.Evolution is the process of change in the inherited characteristics of biological populations over successive generations. This can occur through natural selection, genetic drift, gene flow, and mutation, and can lead to the emergence of new species over time.
Evolution is driven by various factors, including environmental changes, genetic variation, and reproductive success. It is a fundamental concept in biology and provides the framework for understanding the diversity of life on Earth.
Convergent evolution, is where two unrelated species develop similar characteristics due to their adaptation to similar environments or ecological niches.
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Higher energy contained in the sugar molecules produced by photosynthesis comes from
A. light
B. water molecules.
C. ΑΤΡ.
D. carbon dioxide molecules.
Answers
Answer:
A
Explanation:
light
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Which graph représents selection that may lead to reduced variatior
Proportion of individuals
o
Trait Value
=
Original population
Answers
The SECOND graph represents selection that may lead to reduced variation. It is an example of stabilizing selection.
What is Stabilizing selection?Stabilizing selection is a type of natural selection that leads to a decrease in the genetic variation of the population.
In Stabilizing selection, natural selection tends to favor an average phenotype and then can remove (select) extreme variations.
Stabilizing selection generates a modified bell curve graph in which the central portion is narrower and it is taller than the normal distribution bell shape.
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Match the drug schedules to their descriptions.
Valid medical use but with severe limitations and high potential for abuse and dependence
Answers
Answer:
A. valid medical use but with severe limitations and high potential for abuse and dependence, for example cocaine and morphine. Schedule 2
B. maximum possibility for abuse, no valid medical use, for example heroin and LSD. Schedule 1
C. wide medical use and low potential for abuse and dependence, for example Valium and Xanax. Schedule 4
D. very low potential for abuse and wide medicinal use, for example cough medicines. Schedule 5
E. less potential for abuse and established medical use, for example barbiturates and steroids. Schedule 3
Explanation:
Expained
What might happen to the allele frequencies if the number of hawks declined?
Answers
If the number of hawks declined, the allele frequencies in the hawk population would be affected. Specifically, alleles that contribute to traits that are advantageous for survival and reproduction in hawks would decrease in frequency, while alleles that are less advantageous would increase. This could lead to a decrease in genetic diversity and potentially reduce the overall fitness of the hawk population.
Where does the Energy from plants originally come from?
Answers
Answer:
In plants, these energy factories are called chloroplasts. They collect energy from the sun and use carbon dioxide and water in the process called photosynthesis to produce sugars. Animals can make use of the sugars provided by the plants in their own cellular energy factories, the mitochondria.
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Explanation:
Which of the following is not true about the taiga biome?
a. The taiga biome has four distinct seasons.
b. It is characterized by the presence of coniferous trees.
C. It is the largest biome in the world.
d. It is located below the tundra in North America, Europe, and Asia
Answers
Answer:
A. The taiga biome has four distinct seasons. Is the answer.
Explanation:
I just took the test.
Answer:
a. The taiga biome has four distinct seasons.
explain the following terms: dna,chromosomes,sister chromosomes homologous chromosomes and replication chromosomes
Answers
DNA stores the genetic code, chromosomes are thread-like structures, and sister chromatids are two halves of chromosomes.
Your genetic code is stored in every cell of your body in the form of deoxyribonucleic acid (DNA). It makes your body's instruction manual. The DNA molecule is packaged into thread-like structures called chromosomes in each cell's nucleus. The term "homologous chromosome" refers to chromosomes that share the same genetic foundation but may also have variants caused by replication. The two halves of a given chromosome that are held together at the centromere are called sister chromatids. After the cell has gone through the process of DNA replication in order to get ready for cell division, chromosomes are known as "replication chromosomes" emerge.
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While mRNA strands are being created a sequence is sometimes miscopied. What will be the effect of this on the cell?
Group of answer choices
The damaged mRNA may cause cell death.
Translation may not take place.
Future transcription will not take place.
Ribosomes may be destroyed.
Answers
Answer:
If the sequence of mRNA is miscopied, it will change the sequence of amino acids of the protein. Consequently, the protein may become non-functional.
Explanation:
So the second one or the third one I'm not sure sorry <3
Answer:
Translation may not take place.
Explanation:
Hope this helps.
Proteins–large complex molecules–are major building blocks of all living organisms. Discuss the chemical composition and levels of structure of proteins.
Answers
Amino acids are the building blocks of all proteins, no matter their function. Proteins are typically a chain of 20 amino acids. The human body can use combinations of these same 20 amino acids to make any protein it needs.
The roughly 20 canonical amino acids can be categorized based on their characteristics. Charge, hydrophilicity or hydrophobicity, size, and functional groups are significant variables. Protein structure and protein-protein interactions are influenced by these characteristics. Leu, Ile, Val, Phe, and Trp are hydrophobic residues that are frequently buried in the center of water-soluble proteins, whereas hydrophilic side chains are exposed to the aqueous solvent.To know more about Amino acids, visit:
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Matching
a) fiberfill
b) mantle
f) pollution
e) blowtorch the movie
i) greenhouse effect j) compost
c) lava
g) the "Big One"
k) fumaroles
d) plate
h) glacier
1) atmosphere
16. A material made from fibers that is used to create bulk.
17. Mixture of organic matter used to enrich the soil.
18. Melted rock.
19. Mass of ice that flows slowly over land.
20. Of a section the earth's crust.
21. Warming of the earth caused by an increase of carbon dioxide in the
22. The part of the earth between the crust and the core.
23. Tool that uses a mixture of gas and air under pressure, similar to a hot spot.
24. Poisoning or dirtying the environment.
25. Expected big earthquake in California due to the high pressure in the plates.
Answers
A mixture of organic matter that is used for enriching soil is known as compost. The correct matches are given as- 16-a ,17-j, 18-c, 19-h, 20-d, 21-i, 22-b, 23-e , 24-f ,25-k.
A mixture that is used as a plant fertilizer in order to improve the quality of soil is known as compost. The compost is prepared naturally from the decomposition of plants, food, and other organic materials.
Compost is added to the soil to provide nutrition to the plants. It is also rich in many soil microbes such as protozoa, bacteria, fungi, and nematodes. It can be used to fertilize the soils in gardens, agricultural fields, and in organic farming.
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According to the age structure diagram shown Chad is most likely which type of country?
Answers
The answer is that Chad is most likely a developing country. According to the age structure diagram given in the question, the population of Chad is mostly young and has a smaller proportion of elderly people.
This suggests that Chad is most likely a developing country. Developing countries have younger populations with higher fertility rates and lower life expectancies, resulting in a larger proportion of children and young adults in the population.
As a result, the population structure of a developing country is usually characterized by a broad base (large proportion of children and young adults) and a narrow top (small proportion of elderly people).Chad is most likely a developing country due to the shape of its population pyramid or age structure diagram.
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Does the light independent pathway of photosynthesis continue to occur when the leaf disks are placed in the dark environment
Answers
Answer: Does the light independent pathway of photosynthesis continue to occur when the leaf disks are placed in the dark environment.
In plants, carbon dioxide (CO2) enters the leaves through stomata, where it diffuses over short distances through intercellular spaces until it reaches the mesophyll cells. Once in the mesophyll cells, CO2 diffuses into the stroma of the chloroplast, the site of light-independent reactions of photosynthesis.
Yes, the light independent pathway of photosynthesis continues to occur when the leaf disks are placed in the dark environment.
What is photosynthesis?“The process by which green plants make their own food in presence of sunlight, chlorophyll and carbon dioxide is called photosynthesis.”In this process oxygen molecule is released as by product.It has two pathways: light dependent and light independent.
In light dependent pathway, light energy is used by chlorophyll and is converted into chemical energy.In light independent pathway, the energy produced during light dependent pathway is used to convert carbon dioxide into carbohydrates. It occurs in the stroma of the chloroplast.Hence, it is true that the light independent pathway of photosynthesis continues to occur when the leaf disks are placed in the dark environment.
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genetics and the environment both play roles in cell differentiation. which is the best example of an environmental factor influencing cell differentiation
Answers
Answer: etiolation of plant growth in shade, with fast growing cell without chloroplasts. Out of shade, cell differentiate again to produce photosynthesising cells
Explanation: It is a subjective decision as to what is ‘best’. Good examples are plant responses to changes in the nutrient supply.
when soil nitrogen is depleted some plants, such as legumes, grow nodules on their roots, with cells that release chemical signals to attract nitogen fixing bacteria.
Lack of light induces etiolation in many plants. New cells elongate and develop without chloroplasts, with rapid cell division exhibiting gravitropism, extending upward. When they grow beyond the shade area, cell differentiation changes again, to produce photosynthesising cells.
The color of the mustard plant in Lab 4 (Natural Selection) was determined by a single gene with two alleles (Y or y). The Y allele was dominant to y allele, and Y gave us a green plant, and yy a yellow-green plant. You measure the following genotype frequencies: YY = 0.5; Yy = 0.25; yy = 0.25. You calculate the following Hardy-Weinberg Frequencies: YY = 0.30; Yy = 0.56; yy = 0.14 This population looks like it has evolved. We can tell this because : Group of answer choices
Answers
Answer and Explanation:
It occurs evolution whenever the allelic frequencies in the genic pool change. If the population is not in Hardy-Weinberg equilibrium, it is because one, some, or several of the model's assumptions are not met. If we want to know if a population is evolving, we must observe the frequencies of the population, and if they change over time. If there is a change, it might also be reflected in the phenotypic frequencies.
In the exposed example there was an evident change in the population genetic frequencies.
1) Genotype frequencies: YY = 0.5; Yy = 0.25; yy = 0.25
Genic or Alleleic frequency:
Frequency of y= f(q)= √0.25 =0.5Frequency of Y= f(p)= 1- 0.5 =0.52) Hardy-Weinberg Frequencies: YY = 0.30; Yy = 0.56; yy = 0.14
Genic or Alleleic frequency:
Frequency of y= f(p)= √0.14 =0.374
Frequency of Y= f(p)= 1- 0.5 =0.626
The allelic frequencies and hence the genotypic frequencies changes, so we can assume that there was evolution.
1. Which is an example of how trace evidence can be used to solve a crime?
A) A forensic scientist concludes that tiny hairs found on a murder victim were not those of a suspect, but rather those of a dachshund.
B) A large clump of hair next to the victim is matched to a suspect.
C) The rifle used in a crime was bought by the suspect; the rifle seller identified the suspect.
D) A blood pool near the victim yields DNA that matches that of the suspect.
2. During which phase of the autopsy would the body be measured?
A) external examination
B) internal examination
C) pre-autopsy
D) post-autopsy
3. Which bone would a forensic anthropologist analyze to identify a victim as male or female?
A) humerus
B) skull
C) phalanges
D) tibia
4. A dried corpse that is found in the woods has a cheesy smell and no insects are present. Which is the correct postmortem interval?
A) 4 days
B) 8 days
C) 19–30 days
D) 31–50 days
Answers
Answer:
1 A 2 C 3 A 4 D I hope you like this answers
1. An example of how trace evidence can be utilized to solve a crime is when a forensic scientist comes to the conclusion that small hairs found on a murder victim were not those of a suspect, but rather those of a dachshund.
2. The body would be measured during the autopsy's exterior examination stage.
3. A forensic anthropologist would examine the skull bone to determine whether a victim was male or female.
4. The correct postmortem interval is probably 31–50 days if an insect-free dry corpse is discovered in the woods with a cheesy odor.
Forensic scienceThe term "trace evidence" describes minute but discernible quantities of physical or biological material discovered at a crime scene. The forensic scientist in this case used a microscopic examination of hairs to rule out a suspect and identify a dachshund as the true culprit.
The body is measured and checked for any exterior wounds or other identifiable features during the autopsy's external inspection stage.
Forensic anthropologists frequently utilize the skull to ascertain a victim's s ex. The gender of the victim can be determined by the size and shape of specific skull features, such as the jaw and brow ridge.
The time since death is referred to as the postmortem interval (PMI). Due to the fact that insects are frequently the first creatures to colonize a body after death, the absence of insects in this scenario predicts a PMI of 19 to 30 days.
Adipocere, a waxy material that occurs as fatty tissue degrades over time, maybe the cause of the cheesy scent.
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