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3 years ago

Help me please!!20 points!

Biology

1 answer:

Rina8888 [55]3 years ago

3 0

Underwater Ways!
The Aquarius Reef Base is an underwater habitat 5.4 meters off Key Largo in the Florida Keys National Marine Sanctuary. It is deployed on the ocean floor 62 ft below the surface and next to a deep coral reef called Conch Reef.

(That is all I can tell you.)

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Scientists are developing a malaria vaccine that would most likely contain

Travka [436]

Sporozoites that have undergone radiation. The PfSPZ vaccine has been in development by the company. The premise of the vaccine is use to use these radiated sporozoites inside the body to bring forth an attack on the sporozoite, which will help the body prevent itself against further attacks of malaria. Due to its promising nature, the U.S FDA department granted it the fast track designation in 2016.

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3 years ago

What is the effect of differential reproduction over time?How is the sickle-cell allele maintained through natural selection?

ololo11 [35]

Answer:

Differential reproduction leads to a change in allele frequencies over time. This occurs because of natural selection favoring "successful" individuals that produce more viable offspring.

The sickle-cell allele is maintained in populations exposed to malaria through balancing selection, since heterozygous individuals have protection against the disease.

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3 years ago

If a cell with high concentration of solute is placed in freshwater, in which direction will water move and what effect will thi

kobusy [5.1K]

Answer:

towards the cell, because salt, and the cell may die

Explanation:

3 0

3 years ago

Read 2 more answers

Construct an explanation about the role of

otez555 [7]

Photosynthesis has a role in the cycling of matter and flow of energy into and out of organisms. The flow of energy and cycling of matter can be traced. The chemical reaction by which plants produce complex food molecules (sugars) requires an energy input (i.e., from sunlight) to occur.

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3 years ago

The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list a

____ [38]

Answer:

A A

a Aa Aa

All the offspring have flower located at axial position

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

Explanation:

Let the allele "A" represent the characteristics of axial position of flower

Let the allele "a" represent the characteristics of terminal position of flower

Given -

"A" is dominant over "a"

F1 generation -

Two parents with homozygous genotype for both A and a are crossed . The punnet square for the cross between "AA" and "aa" is as follows -

A A

a Aa Aa

Thus the genotype of offspring is "Aa"

Since, "A" is dominant over "a", all the offspring have flower located at axial position

F2 generation-

The cross between two parents having heterozygous genotype "Aa" will take place .

The punnet square for the cross between "Aa" and "Aa" is as follows -

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

8 0

3 years ago