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2 years ago

The presence of gill-like slits in a human embryo is considered to be evidence for the

Biology

1 answer:

Jet001 [13]2 years ago

5 0

Out of the following given choices;

A. theory that fish and mammals have a common ancestry

B. theory that the first organisms on Earth were heterotrophs

C. close relationship between fish and mammalian reproductive patterns

D. close relationship between humans and annelids

The answer is A. Many embryos of the kingdom Animalia share similarities in the early stages depicting that they share a common ancestor. The gill slits is one example. They diverge in later stages to become Pharyngeal in the human embryo, while they differentiate into gills in fish.

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Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid

Lelu [443]

Answer:

The correct answer is - solubility

Explanation:

Solubility is the nature of the material that is a chemical property of that specific solute ability to dissolved in a solvent. The ability of solute or material in a solvent or liquid is measured by the term of the maximum amount of that material dissolved in the liquid at equilibrium.

Sugar and water is a great example of solubility. When sugar is missed in the water it dissolved in water and disappear in the water here sugar is solute and water is solvent.

Thus, the correct answer is - solubility.

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3 years ago

HELPPPPPPPPP !!!!!!!!!!!!!

stich3 [128]

Answer: I believe the answer would be 2

Explanation:

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2 years ago

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sammy [17]

Small leaves duh and I know because I study it

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2 years ago

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What are the smallest blood cells in the frog?

Tamiku [17]

Answer:

Unlike typical mammalian red blood cells, those from amphibians, such as frogs, contain a DNA-bearing nucleus that is visible in the center of the cell. The circulatory system of amphibians is rather unusual, their hearts having three chambers, two atria, and a single ventricle.

NegativePositive

Positive

The design of the amphibian circulatory system is curious because blood accumulates oxygen in the lungs and is then returned to the heart before being pumped into the rest of the circulatory system. Therefore, a mixing between oxygenated and deoxygenated blood occurs as blood returning to the heart from the lungs is mixed with incoming blood from the body. Frogs handle this situation by having a very slow metabolism and by absorbing some oxygen through their skin. In addition, the ventricle does have some directional control over the distribution of the blood.

Negative

The presence of a nucleus in amphibian red blood cells allows researchers easy access to large quantities of amphibian DNA. Frog blood has both a solid and a liquid portion. The liquid plasma carries solid elements such as red and white blood cells. Blood can be collected from frogs and the red blood cells isolated by centrifugation. After removal of the residual plasma, purified cells can be treated with specific enzymes and detergents to digest the cellular envelope and release DNA from its protein complex. The DNA is then useful for scientific studies and experiments.

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Explanation:

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2 years ago

What are viruses made up of

sukhopar [10]

Viruses are made up of DNA

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3 years ago

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