Describe two methods of reproduction that can be found in bony fishes.
Answers
Bony fishes, also known as osteichthyes, reproduce using two different methods: internal and external fertilization. In external fertilization, males release their sperm into the water where females will then release their eggs.
The eggs and sperm will then meet in the water and fertilization will occur. This method is commonly seen in fish that live in open water such as salmon and trout. On the other hand, internal fertilization is when the male deposits sperm directly into the female's body. This method is used by fish that live in more enclosed areas, such as rivers or lakes, where external fertilization is not possible. Internal fertilization is seen in fish such as guppies and swordfish. Overall, the method of reproduction used by a bony fish depends on their environment and adaptations for survival.
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pcr was used to amplify a specific 500-base section of dna from three birds of the same species that were thought to be related. the three samples of amplified dna were run on an electrophoresis gel. three bands were seen on the gel that were exactly the same size. are the birds related? responses yes, because they came from the same place. yes, because they came from the same place. no, because the bands were the same size. no, because the bands were the same size. yes, because the bands were the same size. yes, because the bands were the same size. you cannot tell from the bands.
Answers
This suggests that they are likely to be related, but it does not prove definitively that they are related because "you cannot tell from the bands." Option F is correct.
The fact that the three birds of the same species yielded DNA bands of the exact same size after PCR amplification indicates that they have the same sequence of the targeted 500-base section of DNA.
While the three birds being from the same place could potentially suggest that they are related, it is not a conclusive piece of evidence for determining their relationship.
Additionally, the fact that the bands were the same size is a result of the PCR amplification of the same target sequence, but it does not necessarily provide information about the genetic relatedness of the birds. Therefore, both "no, because the bands were the same size" and "yes, because the bands were the same size" are incorrect responses.
Hence, F. is the correct option.
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--The given question is incomplete, the complete question is
"PCR was used to amplify a specific 500-base section of DNA from three birds of the same species that were thought to be related. the three samples of amplified DNA were run on an electrophoresis gel. three bands were seen on the gel that were exactly the same size. are the birds related? responses A) yes, because they came from the same place. yes, because they came from the same place. B) no, because the bands were the same size. C) no, because the bands were the same size D) yes, because the bands were the same size. E) yes, because the bands were the same size. F) you cannot tell from the bands."--
The celiac ganglion ________. Group of answer choices is located near the base of the superior mesenteric artery arises from the greater splanchnic nerve projects postganglionic fibers that innervate the small intestine and the kidney and urinary bladder arises from the lesser splanchnic nerve arises from the lumbar splanchnic nerve
Answers
Answer:
The correct answer is ''arises from the greater splanchnic nerve''
Explanation:
The greater splanchnic nerve or great adrenal nerve, originates in the thoracic sympathetic chain from vertebral levels T5 to T9 (T10). It runs over the bodies of the thoracic vertebrae and as it descends it becomes more anterior. It enters the abdomen crossing the diaphragmatic pillar and ends at the celiac plexus. The upper part of each celiac ganglion continues with the greater splanchnic nerve. The collateral or prevertebral ganglia innervate the abdominal and pelvic organs and viscera. The celiac ganglion receives preganglionic fibers from T5 to T12 and innervates the stomach, liver, pancreas, gallbladder, small intestine, spleen, and kidneys.
g Sometimes (maybe even often..), changes to scientific models are met with resistance. When Dr. Ignaez Semmelweis first advocated for handwashing, he was dismissed by the scientific community for a variety of reasons. It wasn't until 20 years after his discovery (and a few years after Semmelweis' death) that handwashing and sanitizing medical instruments became standard practice in the medical field (this came about with the development of germ theory, which provided a theoretical explanation of these findings). What do you think may have caused this resistance to changing the scientific model
Answers
Resistance to changing the scientific model proposed by Dr. Ignaz Semmelweis may have been caused by entrenched beliefs, reluctance to adopt new practices, and skepticism from influential individuals within the scientific community.
The resistance to changing the scientific model proposed by Dr. Ignaz Semmelweis could have been caused by several factors. Firstly, the prevailing scientific and medical beliefs of the time may have been deeply ingrained and resistant to change. The established medical practices and theories may have been firmly held by the scientific community, making it difficult for new ideas to be accepted.
Secondly, Semmelweis' ideas challenged the status quo and required a significant shift in behavior and practices. Handwashing and sanitation were not common practices in the medical field at that time, and implementing such changes would have required significant effort and resources. Resistance to change may have stemmed from the perceived inconvenience or disruption caused by adopting new practices.
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A group of students were trying to understand how meiosis works. They picked a bunch of dandelions in order to examine the developing seeds and found two distinct groups of cells, A & B.
A 2 column table with 4 rows. Column 1 is labeled Observation # with entries I, I I, I I I, I V. Column 2 is labeled Prediction with entries the cells in group B had chromosomes in 2 distinct lines; the cells in group A divided and produced 2 daughter cells; sister chromatids were pulled apart by microtubules in group A; chromosomes were made up of 2 sister chromatids in group b.
If the students wished to determine which cells are undergoing meiosis I or meiosis II, which observations would be useful to help with making the distinction?
I & II
I & III
II & IV
III & IV
Answers
By using these observations, the students can differentiate between cells undergoing meiosis I (group A) and meiosis II (group B).
To determine which cells are undergoing meiosis I or meiosis II, the students can use observations III and IV.
Observation III states that the cells in group A divided and produced 2 daughter cells.
This is characteristic of meiosis I, where a cell undergoes division to produce two daughter cells with half the number of chromosomes as the parent cell. In meiosis II, the daughter cells from meiosis I divide again to produce four cells with a single set of chromosomes.
Observation IV states that chromosomes were made up of 2 sister chromatids in group B.
This indicates that group B cells are in meiosis II, where the sister chromatids are pulled apart by microtubules to separate into individual chromosomes.
By using these observations, the students can differentiate between cells undergoing meiosis I (group A) and meiosis II (group B).
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Replicate the following strand of DNA: AATCATGGA
Answers
Answer:
UUAGUACCU
Explanation:
A ---> U
T ---> A
C ---> G
it's been a while since I did this stuff but I'm 99% sure it's correct
The replicate strand of the given strand of DNA is TTAGTACCT as per the complimentary base pairing in DNA.
What is DNA?DNA is a hereditary material which is present in human beings as well as all other living organisms. Every cell which is present in an organism's body has DNA which is the same. Most of the DNA is situated in the cell's nucleus and small amount of it can be found in the cell's mitochondria as well.
Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.
DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule and a phosphate group. A base, phosphate sugar are together called as nucleotides.
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A person with anti-A and anti-B antibodies in their blood has what blood type?А. type AВ. type BС. type ABD. type 0
Answers
The answer is the letter D. type O
The blood type O contains both the anti-A and anti-B antibodies in their plasma. Antigens are protein molecules that are found on the surface of red blood cells and they are involved in the natural defense of the body. They have the ability to recognize foreign substances including germs and aerts the
Answer this please I promise 30 points + mark as brainliest ( only relevant answers )
Answers
Answer:
A) Group X = Rose ,mango tree,marigold,palm tree
B) This is the answer of group X =Rose ,mango
This is the answer of group Y =Fern ,pine trees
Explanation:
Answer:
jen, from my heart im saying i lu.v u for real
its been almost 5 months weren't having the same old c.hat we used to have.
ik that ur scared to c.hat with me since the day ur mom caught u
but still the old memories keep coming into me how many times i try to forget u, i still lu.v u jen still lu.v u
and as i made u a promise that one day we'll meet, i still keep thqat word and that day even if its just one day, we're gonna enjoy the max we could
i'll be waiting for that moment and i hope u would be too...
still lu.v u :( .......
Two similar waves are traveling through the same medium. Wave A has a frequency that is 3 times that of wave B. How do their wavelengths compare?
a. λA=1/9 λB
b. λA=λB
c. λA=1/3 λB
d. λA=3 λB
Answers
Answer:
The wavelength of wave B will be greater than wavelength of wave A which has greater frequency.
What is wavelength?
The wavelength of a wave is the distance traveled by the wave.
The relationship between wavelength and frequency of a wave is given as;
v = fλ
λ = v/f
At a constant speed of sound, increase in frequency causes a decrease in the wavelength of a given wave.
Thus, the wavelength of wave B will be greater than wavelength of wave A which has greater frequency.
Explanation:
The wavelength of wave B will be greater than wavelength of wave A which has greater frequency. It means λA=1/3 λB. The correct option is c.
What is wavelength?The distance over which a periodic wave's shape repeats is known as the wavelength in physics. The distance a wave travels is measured by its wavelength.
The following is the formula for a wave's relationship between wavelength and frequency:
v = fλ
λ = v/f
A given wave's wavelength decreases as its frequency rises with a constant speed of sound.
Thus, the correct option is c.
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Distance time graphs can you be used compare the what of two different objects
Answers
Answer:
Recall that on a distance–time graph, the speed of an object is equal to the gradient of the line that represents its motion. Therefore, to compare the speeds of the objects, we'll calculate and compare the gradients of the two lines
where are proteins made in a cell
Answers
What is not classified as an organism
Answers
All organisms can be classified, Even organisms that are extinct can be classified.
Answer:
tree
Explanation:
because it may be a plant but its still not bond with plants
In the space below, write your answer of the probability that this individual inherited 1 non-functional allele of the cancer-suppressor gene, predisposing him to cancer, but remembering that no individual that survives to birth can be homozygous for the recessive non-functional allele.Write your probability as a decimal fraction, starting with 0. and including 4 decimal places.
Answers
The probability that this individual inherited 1 non-functional allele of the cancer-suppressor gene, predisposing him to cancer, is 0.2500.
To calculate the probability of an individual inheriting 1 non-functional allele of the cancer-suppressor gene, we need to consider the inheritance patterns and assumptions stated in the question. Specifically, we need to account for the fact that no individual that survives birth can be homozygous for the recessive non-functional allele.
Assuming a simple Mendelian inheritance, where the non-functional allele is recessive, we can use the Punnett square to calculate the probability.
Let's represent the functional allele as F and the non-functional allele as f.
According to the question, no individual that survives birth can be homozygous for the recessive non-functional allele. This means that the individual must have at least one functional allele (Ff or FF).
The probability of inheriting one non-functional allele (f) would occur when one parent passes on the non-functional allele and the other parent passes on the functional allele.
Considering that both parents are heterozygous (Ff), the probability would be:
Probability = 1/2 × 1/2 = 1/4 = 0.2500
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What prediction can you make about future levels
of carbon dioxide (CO2) in the atmosphere?
Answers
Answer:
they will increase
Explanation:
constant increase in population is leading to increased demand for land. hence more trees will be cut down for land hence high co2 levels due to reduced photosynthesis.
high popn. also leads to more pollution hence high co2 conc.
If a population grows larger than the carrying capacity of the environment, the population is likely to
A. Decrease
B. Increase
C. Stay the same
D. Move
Answers
Answer:
A. Decrease
Explanation:
The carrying capacity for an environment is how much it is able to hold, so if the population grows bigger than its carrying capacity than it will not be able to handle all the organisms, therefore causing the death rate to rise.
Answer:
the death rate will increase, so A is the answer
Explanation:
if a population exceeds carrying capacity, the ecosystem may become unsuitable for the species to survive
5. Why is the residence time in rivers so low?
Answers
Answer:
because of flual flow the have c shaped
Which part of the vertebrate brain develops from the embryonic diencephalon, and acts as a relay center by processing afferent sensory information and sending it on to the cerebral cortex?
Answers
The thalamus is the part of the vertebrate brain which develops from the embryonic diencephalon and acts as a relay center by processing the afferent sensory information and sending it on to the cerebral cortex.
The thalamus is a pair of structures located in the center of the brain, just above the brainstem. It is composed of multiple nuclei, each of which has a specific function related to sensory processing, motor control, and other cognitive processes.
The thalamus receives sensory information from the peripheral nervous system and processes it before sending it to the appropriate area of the cerebral cortex for further processing and interpretation.
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Im So CoNfUsEd!!!!!!!!!!!!! Which factor causes gas and dust to pull together during the first stage of star formation?
A. density
B. gravity
C. heat
D. pressure
I JUST LEARNED THIS BUT I DONT REMEMBER!!
Answers
Answer:
B. Gravity
Explanation:
I got this correct on Edg 2020. Also, gravity has the inherit property to pull any objects with mass together. This means gravity is the sole reason as to why the gas and dust pull together when forming stars.
Delect the correct answer from each drop-down menu.
What kind of species can harm an ecosystem or human health when introduced into the new environment?
Aspecies whose introduction does or is likely to cause economic or environmental harm or harm to human health is afn)
to the new environment.
Answers
An invasive species is any living item that harms an ecosystem and is not a part of it naturally. This includes bacteria, fungi, fish, plants, insects, amphibians, seeds, and even the young of an organism.
Which definition of environment is the most accurate?The effects of all creatures, living and inanimate, that have an impact on human life can be summed up as the environment. Water, land, sunshine, rocks, and other abiotic (non-living) components are examples.
Is the environment comprised of nature?The natural environment, also known as the natural world, is composed of all living and non-living things that emerge spontaneously, or in this case, without the aid of artificial means. Most often, Earth or particular areas of it are mentioned while using the phrase.
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What are the negative sides of Embryonic stem cells
Answers
How do enzymes help maintain accuracy of DNA during replication?
Answers
Answer:
Well for instance, DNA polymerase is an enzyme that assists in the replication process by catalyzing the addition of nucleotides to the growing chain of DNA.
If you could absorb another organism and take on its trait, what would it be? How and why would this new trait help you survive?
Answers
please help this is due today and i still cant figure out this is science for 6-7th grade over nemo characters tahnk you so much
Answers
Human activities have both beneficial and negative effects on the ecosystem.
Human activities and their potential impacts on the ecology are described:
1. Humans snorkel on coral reefs: Responsible snorkelling may not harm the coral reef ecology. Accidental contact or disturbance of coral reefs can damage delicate coral structures, causing long-term injury.
2. The dentist maintains ocean fish in his fish tank as "pets": Capturing ocean fish for aquariums can reduce fish populations if not regulated. Fish in captivity must be ethically sourced.
3. Nemo escapes the sewer into filthy ocean waters, which can harm the ecology. Pollutants impair marine life, habitats, and ecosystems, reducing biodiversity and ecological balance.
4. Overfishing depletes fish populations, disrupts the food chain, and harms the ecology. To preserve the fishing grounds, fishermen must adhere to catch quotas and avoid bycatch.
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producers part1: do you find one producer to be dominant? why might one producer be dominant over another?
Answers
A dominant species may outperform other species in terms of securing resources, fending off illnesses, and fending off rivals and predators.
species in a community that are more numerous than other species and have proportionate effects on the environment, community diversity, and/or ecosystem function. Dominant species may be widespread (common) or confined to a small area. The dominance of species in an ecological environment depends on a variety of variables, including temperature, groundwater quality, and moisture levels. Competition is influenced by ecological dominance.
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The diagram above illustrates the carbon cycle. Which of the Following components of the diagram represent carbon sinks?
A. marine photosynthesis and respiration
B. volcanoes and soil carbon
C. oceans and fossil carbon
D. factories and photosynthesis
Answers
Answer:
D) Factories and Photosynthesis
What happens to the states oWhat happens to the states of matter as you move down the table?
f matter as you move down the table?
Answers
When matter changes its state, it either loses or absorbs energy
Matter changes from solid to liquid, liquid to solid, solid to gas, gas to solid, gas to liquid e.tc
What is Matter?Matter can be defined as anything that has mass and occupies space
According to the law of conservation of mass, it states that matter can neither be created nor destroyed but changes from one form to another.
So therefore, when matter changes its state, it either loses or absorbs energy
Complete question:
What happens when matter changes its state?
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Which of the
following are characteristics of
Zygomycota? Check all
that apply.
lack reproduction phase
spores produced in basidia
D spores produced in zygosporangia
important in the food industry
important in the fermentation process
can cause disease to plants
can cause disease to animals
Answers
Answer:
3- spores produced in zygosporangia
5- important in the fermentation process
Explanation:
do it
You find a new organism and are trying to determine what how it eats. You found it in a mud flat at the ocean and it has no teeth, but a very long alimentary canal. You see living examples moving through the mud very slowly. Based on all of this, you conclude that this animals is
Answers
Answer:
A Detritivore
Explanation:
A Detritivore is a heterotrophic organism that feeds on dead plant and animal materials. They could also feed through coprophagy which is nutrition obtained by feeding on feces. Worms that dwell on the soil, insects, and mollusks are examples of detritivores. Detritivores can also be found residing in aquatic environments. Crabs and Lobsters are examples of these organisms.
Detritivores have no teeth. So, they tend to suck in their food, and this food, through peristaltic actions, moves directly into the digestive tract where it is acted upon by digestive enzymes. From the observations, I made about the organism at the mudflat at the ocean, I can conclude that it is a detritivore.
Describe how the picture below represents the function of the immune system
Answers
Answer:
The Human Immune system helps fight bacteria and germs and viruses because without the Immune system we could die it is what protects us from The flu and sometimes cov id with a weak immune system we might no survive.
Explanation:
Muscle tissue that dilates and constricts the pupils of our eyes are called: ________
Answers
Muscle tissue that dilates and constricts the pupils of our eyes are called iris sphincter muscle.
The iris sphincter muscle is a muscle situated in the colored region of the eye called the iris. It is also known as the pupillary sphincter or sphincter pupillae. The sphincter muscle fibers are at the pupillary edge and slightly anterior to the iris' pigmented epithelium.
It surrounds the pupil of the iris and constricts it under strong light via the pupillary light response or during accommodation. The iris regulates the quantity of light that reaches the retina at the rear of the eye by modulating the diameter of the pupil.
The iris is a circular, pigmented diaphragm that resides in a coronal plane anterior to the lens. It is linked to the ciliary body on the periphery, with its unbound central border generating an opening known as the pupil. The iris splits the space between the cornea and the lens into anterior and posterior chambers.
The cornea and iris surround the anterior chamber. The anterior chamber connects with the posterior chamber via the pupil, which is bounded by the iris, ciliary processes, zoonules, and lens. Both chambers are filled with a fluid material known as aqueous humor.
The accommodative reflex involves the iris via the sphincter pupillae. The accommodating reflex of the eye is an instinctive response that occurs when the visual focus shifts from a distant object to one that is closer.
The reflex is mediated by the parasympathetic nervous system and comprises three actions: pupil aperture modification, lens shape modification, and convergence. The sphincter pupillae narrows the pupil to prevent divergent light rays from the corneal periphery from blurring the vision.
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Biuret's turned purple and the Sudan solution turned red
and bubbled. All other indicators were negative.
Would this be
Chicken leg?
Bread?
Grapes?
Chocolate?