choose all features that confined the green algal ancestors of plants to water.
Answers
Green algal ancestors were confined to water as they have flagellated gametes, lack supportive tissues, lack roots, and have single-celled walls.
Features of green algal ancestors:
The features that confined the green algal ancestors of plants to water include the following: They have flagellated gametes: The gametes (sex cells) of green algal ancestors were flagellated, meaning they had long, whip-like appendages that allowed them to move through the water. This allowed them to reproduce in water environments and prevented them from spreading to land.
Green algal ancestors lacked supportive tissue: Green algal ancestors lacked the supportive tissue that plants use to stand up straight and support themselves on land. This made it difficult for them to survive in a terrestrial environment. They had to rely on water to support them. These organisms lacked roots: Green algal ancestors lacked roots, which plants use to absorb water and nutrients from the soil. This made it difficult for them to survive on land where water is often scarce. They had a single-celled wall: Green algal ancestors had a single-celled wall, which made them susceptible to desiccation (drying out). This is another reason they were confined to water environments.To know more about green algae, visit:
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Related Questions
A bird watcher sees an unusual bird at a feeder. He
takes careful notes on the bird's color, shape and
other physical features, and then goes to a reference
book to see if he can identify the species. What aspect
of scientific thinking is MOST apparent in this
situation?
Answers
Answer:
he takes careful notes on the bird's color, shape and
other physical features
Explanation:
What is true about a gene mutation? A. They affect a single gene. B. They cause the entire chromosome to die. C. They are much larger than chromosomal mutations.
Answers
They are much larger than chromosomal mutations. A genetic mutation is a change in DNA sequence of a gene that results in development of new organism. It alters DNA sequence of the gene permanently.
Genetic diversity is crucial for human evolution, which is a long-term process of expansion. Only one person is impacted by a chance genetic mutation. Their offspring inherit the person's genetic mutation. If the mutation increases a person's chance of living or preventing illness, it starts to be handed down through the generations and spread throughout the population. As it is passed from one generation to the next, the mutation changes from a gene variant to a normal gene and becomes a crucial component of the human genome.
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Which lists the elements in order from least conductive to most conductive?
Answers
Answer: Nitrogen (N), antimony (Sb), bismuth (Bi) is the order from least conductive to most conductive.
I hope that help bye
7(c)(i). The diagram 7.2 shows the materials used by Claudia for preparing
tea. Claudia finds that the colour of the tea is light. Why? *
Answers
Answer: Because she used cold water
Explanation:
Tea leaves contain different flavors that dissolve in water to give it its distinct taste as well as its color. If water is hot, the flavors will dissolve quickly due to the fast movement of the heated water molecules.
If the water is cold however, as is the case in the above scenario, the flavors will take longer to dissolve in the water which means that the tea's color will not change drastically leading to a light tea.
a localized, intense pain that arises from the lining of the abdominal cavity is
Answers
The localized, intense pain that arises from the lining of the abdominal cavity is known as peritonitis.
Peritonitis is a medical condition characterized by inflammation of the peritoneum, which is the thin tissue lining the inner wall of the abdomen and covering the abdominal organs. This inflammation can be caused by a variety of factors, including bacterial or fungal infections, injury or trauma to the abdomen, chemical irritation, and certain medical procedures.
The symptoms of peritonitis can include severe abdominal pain, tenderness, and swelling, fever, nausea and vomiting, loss of appetite, and a feeling of general malaise.
Treatment for peritonitis typically involves antibiotics to treat the underlying infection, surgical intervention to drain any abscesses or remove damaged tissue, and supportive care to manage pain and other symptoms. If left untreated, peritonitis can lead to serious complications, such as sepsis, multiple organ failure, and even death.
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how many units of energy would there need to be in the first trophic level to end up with 1000 units
Answers
One million energy units would there need to be in the first trophic level to end up with 1000 units.
This is because only about 10% of the energy is transferred to the following trophic level. The remaining energy is released as heat energy during respiration, one of several ways it leaves the food chain. Life processes make use of it (eg movement)Energy is lost as metabolic heat when an organism from one trophic level is consumed by an organism from the next level, which causes energy to diminish as it goes up the trophic levels. The efficiency of energy transfer between trophic levels is measured by a term called trophic level transfer efficiency (TLTE).
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how might it hurt ecosystem stabiility
Answers
after a drought, what happened to the average beak size of medium ground finches? a. they decreased in size b. they remained the same c. they increased in size
Answers
After a drought, the average beak size of medium ground finches decreased in size.
The average beak size of medium ground finches decreased after a drought as a result of natural selection. The drought caused a scarcity of large seeds, which made it more difficult for finches with larger beaks to survive and reproduce. In contrast, finches with smaller beaks were better suited to feed on the smaller, softer seeds that were more abundant during the drought. Over time, this led to a shift in the population towards smaller beak sizes, as the individuals with smaller beaks were more likely to survive and pass on their genes.
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20 points
a student carried out an experiment to determine how different concentrations of sucrose solution will affect osmosis. the student set up dialysis tubing bags of different sucrose concentrations. then the student massed the bags, placed them in beakers of distilled water for thirty minutes, and then removed the bags. the masses were taken again and the percent change for each bag was calculated. the results were graphed and are shown here. which statements best summarize the experimental data. choose all that apply.
a. low sucrose concentrations caused more water to move out of the bags
b. high sucrose concentrations cause more water to move out of the bags
c. low sucrose concentrations caused more distilled water to move into the bags.
d. high sucrose concentrations caused more distilled water to move into the bags.
e. there is a correlation between sunrise concentration in the bag and the rate of osmosis in the bag.
Answers
The inference is that high sucrose concentrations caused more distilled water to move into the experimental bags.
What is osmosis?It is the movement of water molecules from the region of high water potential (low solute concentration) to the region of low water potential (high solute concentration) through a selectively permeable membrane.
Thus, the higher the concentration of sucrose in the bag, the lower the water potential, and the more water molecules move into the bag.
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Answer:
D and E
Explanation:
Taking it rn, Hate test prep
What causes water to maintain its temperature whether it is hot or cold?
Answers
Answer:
The hydrogen bonds between water molecules
Explanation:
The hydrogen bonds in water allow it to maintain its temperature.
let's learn more about water temperature maintenance
How water maintain its constant temperature?Temperature is a measure of the motion (kinetic energy) of molecules. As the motion increases, energy is also higher and thus temperature is higher.Water’s high heat capacity is a property caused by hydrogen bonding between water molecules. When heat is absorbed, hydrogen bonds are broken and water molecules may move freely. When the temperature of water decreases, the hydrogen bonds are formed and release a great amount of energy.Thus, we can conclude that water maintain their temperature by hydrogen bonding.
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Aligators are reptiles that live on land and in water. During dry seasons, alligators make deep holes in the wetlands. What is the most likely reason alligators have adapted in this way?
Answers
Alligators are reptiles that live on land and in water. During dry seasons, alligators make deep holes in the wetlands. The most likely reason alligators have adapted in this way is to avoid drought and extreme heat by burying themselves into the mud. In this way, alligators have been able to avoid dehydration and overheating during hot and dry seasons. The holes they dig offer a cool refuge where they can remain hidden and conserve water.
Adaptation in animals refers to the ways in which the environment has influenced their features and behaviors. Alligators, as reptiles, have adapted to their wetland habitat in several ways. Their physical characteristics, such as their tough skin, long tails, and powerful jaws, have evolved to help them survive in this environment. They are cold-blooded, which means that their body temperature fluctuates with the temperature of their surroundings. This characteristic allows them to conserve energy when it is cold and to regulate their body temperature when it is hot.
Alligators have adapted to their habitat in other ways as well. During dry seasons, when the water levels in the wetlands decrease, alligators have been observed digging deep holes in the mud. The most likely reason for this behavior is to avoid dehydration and overheating during hot and dry seasons. These holes offer a cool refuge where alligators can remain hidden and conserve water.
In conclusion, alligators have adapted to their wetland habitat in several ways, including the ability to dig deep holes during dry seasons. This adaptation allows them to avoid dehydration and overheating during hot and dry seasons by burying themselves into the mud. By doing so, they can remain hidden and conserve water while waiting for the next rainy season.
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Select all that apply
Which of the following are true of frameshift mutations?
They are caused by extra or missing nucleotides in a DNA sequence.
A nonfunctional protein may be produced.
They are often much more severe than point mutations.
Answers
Answer:
They are caused by extra or missing nucleotides in a DNA sequence.
the researcher used the dorsal heat treatment as the control. propose a different treatment that would have been another valid control. college board
Answers
If the researcher used dorsal heat treatment as the control, an alternative valid control could be a "sham treatment" or "placebo treatment" where a similar procedure is performed but without the actual heat application.
This would involve mimicking the process of the dorsal heat treatment, including all the steps and handling, but without the actual application of heat. The purpose of using a sham or placebo control is to account for any non-specific effects that may occur due to the treatment procedure itself.
By comparing the effects of the actual treatment (dorsal heat treatment) with the effects of the sham treatment, researchers can assess whether the observed outcomes are specific to the treatment or are simply due to the psychological or physiological responses associated with the procedure.
Using a sham treatment control helps to minimize biases and provides a more accurate evaluation of the effectiveness of the dorsal heat treatment.
It allows for a better understanding of whether any observed changes or effects are attributable to the heat treatment specifically or if they can be attributed to other factors such as the handling, attention, or expectations associated with the procedure.
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. During which part of the cell cycle does the cell divide?
Answers
Answer:
The part of the cell cycle in which the cell divides is called mitosis.
Explanation:
Mitosis, or M phase of the cell cycle, is where the somatic cell divides to obtain two daughter cells identical to the original. Mitosis is divided into four phases, known as prophase, metaphase, anaphase and telophase.
Literally, cell division into two daughter cells or cytokinesis occurs in the last phase of mitosis, telophase, since in the other phases cell nucleus division and chromosome distribution occurs.
The other major part of the cell cycle is known as the interphase, in which the cell prepares for division in the M phase.
How are land breezes and sea breezes different?
Answers
Answer:
Land breezes come from land while sea breezes come from the ocean or other large bodies of water. The key difference is due to the property of water to retain heat and warm up longer as compared to land. Land breezes are also known as off-shore winds while sea breezes are also called on-shore winds.
Explanation:
Land breeze blows during the night from land to sea and the land becomes cooler faster than the sea. The air above the sea becomes less dense (i.e. warmer) and rises. The cooler air from the land moves in to take its place. Sea breeze: Sea breeze blows during the day and the land heats up faster than the sea.
what is the basic unit of classification of living beings
Answers
Answer:
The basic unit of classification of living beings, from the taxonomic point of view, is species.
Explanation:
Taxonomy is a discipline that deals with the classification of living beings, its basic unit of classification being the species category.
A species includes all the individuals with morphological and functional similarities, which also have the capacity to make crosses among them and have a descendant with the same characteristics, including fertility.
Which of the following is a term used to describe the number of layers of cells?
A) stratified
B) squamous
C) cuboidal
D) columnar
E) All of the above are correct.
Answers
The terms stratified, squamous, cuboidal, and columnar are all used to describe the different types of epithelial cell arrangements. Stratified refers to multiple layers of cells, squamous describes flattened cells, cuboidal refers to cube-shaped cells, and columnar describes cells that are taller than they are wide. Each term represents a different arrangement and shape of cells in epithelial tissues.
For glucose, the citric acid cycle turns _____ time (s).
Answers
For glucose, the "citric-acid" cycle turns two times, and this cycle occurs in mitochondria.
For glucose, the "citric-acid" cycle, also known as the "Krebs-cycle" , turns two times. During each cycle, acetyl-CoA is combined with oxaloacetate to form citrate, which is then metabolized through a series of enzymatic reactions to produce ATP, NADH, FADH₂, and CO₂.
The cycle occurs in the mitochondria of eukaryotic cells and is an essential part of cellular respiration, which converts glucose into ATP, the primary energy source for the cell.
The two turns of the citric acid cycle produce a total of six molecules of NADH, two molecules of FADH₂, and two molecules of ATP, which are used in electron-transport-chain to produce more ATP.
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A group of students is trying.to determine which detergent will best remove an oil stain. They stain five separate cloths with oil and.then wash each of.the cloths in a deficient detergent. They repeat each test two more times. Which step should be included in their investigation plan?
Answers
Answer: Place each oil stain on separate, but identical, pieces of cloth.
The group of students should have stained separate but identical pieces of cloth.
There are different factors that influence how easily a stain will come out of a material such as:
the type of material the detergent used the temperature of the waterAssuming the temperature is held constant and the type of detergent is being tested, the only thing other thing to control is the type of material.
The students used separate cloths instead of identical ones which meant that a significant variable was not controlled.
In conclusion, the students should use separate but identical pieces of cloth so that the type of material would not impart their experiment.
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please answer this? I’ll leave a good review
Answers
Answer:
Carbon Dixode And water
Explanation:
Answer:
lipids and nucleic acids
a list of environmental factors that may affect the rate of gas production
Answers
Answer:
Temperature, light intensity, and the availability of nutrients such as carbondioxide are the environmental factors.
Explanation:
In order to be considered an adaptation, a trait must increase the individual's?
-Fitness
-Strength
-Height
-Range
Answers
strength is needed to become a more dominant species.
in animals, the catabolism of which molecules contributes most to the production of nitrogenous wastes?
Answers
The catabolism of proteins contributes most to the production of nitrogenous wastes in animals.
Proteins are composed of amino acids, which contain nitrogen in their chemical structure. When proteins are catabolized or broken down, the amino acids are released and their nitrogen atoms are converted into ammonia or ammonium ions, which are toxic to the body at high concentrations.
The liver in vertebrates converts ammonia to urea, which is less toxic and more water-soluble and can be excreted by the kidneys. In contrast, many aquatic animals excrete ammonia directly into the water, while some reptiles and birds excrete uric acid as their nitrogenous waste.
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to compete successfully with others, the microbe will not waste energy making unneeded proteins.
Answers
Microbes have the ability to regulate the expression of genes to conserve energy and resources required for their survival. They do not produce any unnecessary proteins to save their energy for growth, reproduction, and defense.
Thus, to compete successfully with others, microbes will not waste energy making unneeded proteins. They have evolved a number of regulatory mechanisms for protein synthesis that ensure the production of the right protein at the right time under the right conditions. Microbial cells have a number of feedback mechanisms that control the production of proteins. For example, when a particular protein is not needed, the gene that codes for it may be turned off, which decreases the synthesis of the protein. When the protein is required again, the gene will be turned on, and the protein will be synthesized again.
Another way microbes conserve energy is through the use of operons. Operons are groups of genes that are involved in the production of a specific protein or set of proteins. These genes are located together on the chromosome and are regulated by a single promoter region. When the protein is needed, the operon is turned on, and all the genes involved in its production are transcribed and translated. When the protein is no longer needed, the operon is turned off, and transcription and translation are stopped.
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Which sentence best explains how a lake forms?
A. Standing water covers coastal areas for most of the year.
B. Water moves underground through cracks in rock formations.
C. Surface water runs downhill and fills large depressions in the
ground.
D. Water runs off the land in narrow channels after it rains.
Answers
Answer:
C
Explanation:
The world's largest ocean is the
a. Indian Ocean
b. Arctic Ocean
C. Atlantic Ocean
d. Pacific Ocean.
Answers
\(\huge\purple{Hi!}\)
the answer is d.pacific ocean is the largest ocean in the world it is also the world's deepest ocean.
Option d is correct. Pacific Ocean is the largest ocean in the world.
The Pacific Ocean, A body of seawater that stretches from the Antarctic region in the south towards the Arctic Circle in the north and is sandwiched between Asia and Australia on the west and South and North America on the east. It covers roughly one-third of the earth's surface and is arguably the largest of the world's oceans. Its total area, excluding neighbouring seas, is estimated 63,800,000 square miles (165,250,000 square kilometres), which is twice the size of the Atlantic Ocean and larger than the entire land area of the world. It has a mean depth of 14,040 feet (4,280 m). The western Pacific is known for its numerous outlying seas.
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The place an organisms live is called it’s
Answers
Answer:Habitat
Explanation:
the two components of the integumentary system are the:
Answers
cutaneous membranes & accessory structures.
A triglyceride is a type of lipid that stores energy for the body. What aspect of a triglyceride molecule's structure helps it fulfill this role?
OA. Its highly branched structure helps the molecule spread its carbon bonds over a large area.
OB. It contains two hydrocarbon chains that repel water and a phosphate group that attracts water.
OC. It contains many phosphate groups, five-carbon sugars, and nitrogen-containing bases in a long chain.
OD. Its unbranched structure helps the molecule pack many chemical bonds into a compact space.
Answers
Answer: D. Its unbranched structure helps the molecule pack many chemical bonds into a compact space.
Explanation: A triglyceride molecule consists of three fatty acid chains that are each attached to a glycerol molecule. The fatty acid chains are long, unbranched hydrocarbon chains that are nonpolar and insoluble in water. The three fatty acid chains are joined to the glycerol molecule by ester bonds, which are high-energy bonds that can be broken to release energy when needed. The unbranched structure of the fatty acid chains allows them to pack tightly together, which increases the number of chemical bonds that can be stored in a small space. This compact packing of chemical bonds is what makes triglycerides an efficient way to store large amounts of energy in a small space.
you are working in a lab that is genetically engineering canaries and rabbits to survive at high altitudes. pick one of the organisms (canary or rabbit) and describe two different physiological adaptations that you would add to your organism. explain why would they be beneficial.
Answers
Two adaptations of a genetically engineered rabbit to survive at high altitudes can be an efficient use of oxygen during cellular respiration and a low rate of urinary excretion, which may increase the adaptive fitness of the species under these conditions.
What is a genetically engineered organism?A genetically engineered organism is an organism whose phenotypic or physiological features have been modified by using genetic engineering techniques such as recombinant DNA procedures. These GMOs can be developed to increase the adaptive fitness of a species under particular conditions.
Therefore, with this data, we can see that genetically engineered organisms such as rabbits at high altitudes may be designed to achieve more efficient use of oxygen and reduce the rate of excretion.
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