The illustration shows bones in four animals. The bones labeled as A are known as
and offer evidence of a common ancestor.
penguin
А
bat
alligator
human
extinct structures
O sequential structures
analogous structures
homologous structures

Answer:

Muscle contraction thus results from an interaction between the actin and myosin filaments that generates their movement relative to one another.

Actin and myosin work together to help you lift an object in the following way:

Therefore, we can conclude that actin is a cellular protein in muscles that is involved in muscle contraction when it connects with myosin.

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Answer:

b. It allows all organisms to be placed into several varieties of taxonomic ranks.

Explanation:

A scientific name is important for every species because it helps to avoid confusion created by common names of two or more species or organisms. In every region there is a name for an organism which causes problem so the scientists suggest that there must be a naming system which is used all over the world so they choose a dead language to giving scientific names to the organisms present all over the world for easily recognition.

Answer: Hewo, there! your answer is Below

A skeletal and circulatory systems  would be my Answer

Explanation:

the skeletal system is responsible for protection, shape, and support. For example the skeletal system protects all some of your most vital organs, such as the brain, lungs, and heart. The skeletal system creates red blood cells which the circulatory system transports. The skeletal system helps the body move.

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Answer:

c

Explanation:

it uses percentages, like 50% Aa, 25% aa and 25% AA

The cells are short and flat which make they easy to layer and overlap and create a protective layer. thus option C is correct.

Primary skin cells of human or animal origin are extracted via the enzymatic and mechanical dissociation of dermal or epidermal tissue.

The cell of skin is short and flat.The shape of these cells enables a new barrier of three-way tight junction contacts to form between them and the neighboring cells in the stratum granulosum. After this barrier has formed, the upper cell leaves the stratum granulosum. thus option C is correct.

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Answer:

the signals have different frequency

Explanation:

The way that interference is avoided in these cases is that the signals have different frequency. Cell phone signals travel in a very specific wavelength, how often this wave repeats in a given span is called the frequency. By having these signals in different frequencies it prevents the signals from mixing with each other and instead allowing them to reach their destination intact. Otherwise, the signals would combine into a mess of uncomprehensible data, which is what we call interference.

Answer:

D.anywhere its service broadcasts and it can receive a signal.

Explanation:

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Answer:

Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere. And most importantly decomposes make vital nutrients available to an ecosystem primary producers- usually plants and algae.

Explanation:

hope it is helpful to you

Answer:

1. Large intestine

2. Skin

3. Liver

4. Lungs

5. Kidney

Explanation:

Bc I said so

Answer: Involuntary.

The Autonomic nervous system is a subdivision of the Peripheral nervous system and it is in charge of the involuntary processes in the body such as blood pressure, respiration and the heart rate. As such, its effectors are under involuntary control.

The Autonomic nervous system controls the smooth and cardiac muscles in the body as well as the glands. This is where it earns its other name, the Visceral nervous system.

Explanation:

Answer: Diploid

Explanation : It's going to be identical Diploid cells

because diploid cells are stomach cells and the liver is beside the stomach which means that when liver cells divides to create a new cell they'll end up being diploid cells

Answer:

the troposphere contains three-quarters of the mass of the entire atmosphere. The air here is 78% nitrogen and 21% oxygen. The last 1% is made of argon, water vapor, and carbon dioxide.

Explanation:

Answer:

1. Ordovician Mass Extinction (about 44o million years ago)

2. Devonian Mass Extinction (about 375 million years ago)

3. Permian Mass Extinction (about 250 million years ago)

4. Triassic-Jurassic Mass Extinction (about 200 million years ago)

5. Cretaceous-Tertiary Mass Extinction (about 65 million years ago)

Explanation:

Answer:

B  Plasmids are circular, double-stranded DNA molecules that provide genes that may aid in survival of the prokaryotic cell.

Explanation:

Plasmids would be additional chromosomal, double stranded also it is covalently that are closed and circular DNA molecules. It possesses genes that represent some unique attributes to the prokaryotic cell like fertility factor, F plasmid, etc. It may existed as an independent entity that should be within the cell or may be they integrate within the host genome this we called as an episomal in nature

In addition to this, Plasmids plays a significant role in the gene transfer i.e. horizontal that should be within the prokaryotes and are widely used in the recombinant DNA technology like vectors

Therefore, the option b is correct

Plasmids are the extrachromosomal material present in prokaryotic cells that divides independently. They are circular and aids in the survival of prokaryotic organisms.

Plasmids are the extra genetic material that is double-stranded and circular found along with the nucleoid in the cytoplasm of the prokaryotic cell. They are majorly used in the genetic engineering process.

They provide protection and antibiotic resistance in the prokaryotes like bacteria as they carry antibiotic degrading genes and enzymes. They are capable of producing enzymes that can degrade antibiotics by cleaving them.

Therefore, option B. plasmids are double-stranded molecules that confer protection to prokaryotic cells.

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Answer:

A decrease in all the prey populations.

Answer:

a decrease in all the prey populations

Explanation:

I Watched a video thing

The BEST example of a point source of water pollution is factory effluent (Option c).

Water pollution refers to the contamination of water with pollutants. These substances (i.e., pollutants) convert water unusable to carry out different activities (e.g., drinking, cleaning, etc).

Water pollutants include, among others, herbicides, food processing waste, volatile compounds, heavy metals, organic pollutant microorganisms (e.g. bacteria, parasites), etc.

Factory effluents are well known to be harmful water pollutants for aquatic ecosystems.

In conclusion, the BEST example of a point source of water pollution is factory effluent (Option c).

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Answer:

B. liquid to a gas.

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Answer:

B. Liquid to gas

Explanation:

Evaporation is when water starts out as a liquid form and evaporates from heat into a gas, aka Water vapor

Answer:

1. Epiphyllous is anything that is growing on the surface of the leaf or get attached to it of any other plant. ... In this, the stamen gets attached to the part of the flower of some other plant as an adhesion of stamen. Explanation: In other words, Epiphyllous stamen are the Filaments fused with tepals.

2. In botany, a staminode is an often rudimentary, sterile or abortive stamen, which means that it does not produce pollen. Staminodes are frequently inconspicuous and stamen-like, usually occurring at the inner whorl of the flower, but are also sometimes long enough to protrude from the corolla.

Explanation:

pls mark me brainless

Answer: cells, tissues, organ, and body system.

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Answer:

It occurs because of the difference in temperature between the ocean and the land.  

This happens because the land heats up faster than the water, causing the air to rise above the land and allowing cooler air from the ocean to move in and take its place.

Because land and water have different capacities for holding heat, the land will heat up more quickly than the water on a hot day near the ocean. As a direct consequence of this, the air that floats above land tends to become warmer and less dense than the air that floats above water. Because of this, a region of low pressure is created over the land, while a region of high pressure is created over the water. In order to maintain a natural equilibrium, air will always move from areas of higher pressure to areas of lower pressure.

A breeze or wind that blows from the water to the land is caused by the air that is cooler and denser over the water moving towards the air that is warmer and less dense over the land. This phenomenon, which is referred to as a sea breeze, can assist in moderating temperatures on land, thereby making it feel more bearable and pleasant to be there.

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Answer:

B

Explanation:

Plants use carbon dioxide in the atmosphere during photosynthesis, herbivores eat the plants, and a carnivore eats an herbivore.

Carbondioxide gas move from atmosphere to the biosphere by absorbing by the plants in the process of photosynthesis. These plants are the food of herbivores so they eat it and carbon move from plant to herbivore. Then the carnivore feed on the herbivore.

So we can conclude that option A is the right answer.

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Answer:

Why is it important that gamete cells have only one set of chromosomes?

2 gametes unite their chromosomes combined them the diploid (2n) of chromosomes.

How does the chromosomes look like?

It has 2 sister chromatids and a centromere the whole thing itself is considered a chromosome.

-TheUnknownScientist

Explanation:

2 gametes

the chromosomes look like 2 sister chromatids

Answer:

Looking at the sky during night is always an amazing scene. It takes our breath away, every time when we see the night sky with countless stars twinkling, full moon and planets. I always wished I reach those far planets travelling in space. The only way I can fulfill my dream is to become an astronaut. Astronaut is a person who is trained to travel in a spaceship to go to outer space. If I were an astronaut, I wish my first mission will be to the moon. However, I will have to undergo a very strict training to survive in space We all have seen the training videos of astronauts in DISCOVERY channel where they even undergo underwater training. Life in space will be different with zero gravity and so we will experience zero weight and will float freely. Wow!!!! that seems to be an exciting thing. But how we will eat and drink?

Explanation:

if you want to imagine about space

first of all you need to clear your mind

and you need to concentrate your mind on the space and imagine .if you are not getting anything then drink some water and repeat the same process . I hope you will be successful to imagine space ..

best of luck

Answer:

B.The clownfish living in a sea anemone

Explanation:

It's a relationship between two organisms where one benefits and the other gains neither harm nor benefit

Answer:

D. Moss growing higher on a tree to gain nutrients and sunlight.

Explanation:

I just had this question.

Answer:

The correct answer is -

A. genotype ration = 1/1 or 100% of Aa.

B. phenotype = all smooth-seeded.

Explanation:

According to the question, in this experiment, the smooth seed is the dominant trait over the wrinkled seed. The wrinkled seed is recessive, therefore, represented by aa and dominant is represented by AA

gametes: A and A from smooth seeded parent and a and a from the wrinkled-seeded parent.

Punnett square:

       A          A

a      Aa       Aa

a      Aa       Aa

In this cross of F1 generation, all the offsprings are Aa in genotype 4/4 or 1/1 or 100 percent chances.

And phenotypically 100% chances of the smooth seed plants.

Answer:

Image result for Two differences between primary and secondary metabolites

Primary metabolites are not species-specific and thus might be identical in some organisms. Secondary metabolites are species-specific and thus are different in different organisms. Primary metabolites are involved in the growth, development, and reproduction of organisms.Aug 18, 2020