Which definition is the best for “semipermeable membrane”?

Activation of the parasympathetic branch of the autonomic nervous system:______

ivanzaharov [21]

Answer:

A - enhances digestion

5 0

3 years ago

In a dihybrid cross, if two heterozygotes (for both genes) are crossed, what will be the expectedphenotypic ratios? (In the foll

olga nikolaevna [1]

In questions like this, the best thing to do is write an example

First of all you need to know that a heterozygous may contribute genotypically different alleles: SY Sy sY or sy

So, if you cross two heterozygotes:

SY Sy sY sy

SYSSYYSSYySsYYSsYy

SySSYySSyySsYySsyy

sYSsYYSsYyssYYssYy

sySsYySsyyssYyssyy

-Well, you see that dominant for both trails are: SSYY, SSYy, SsYY or SsYy

If you count them there are 9 dominant for both trails

-Dominant for the the first trait and recessive for the second can be: SSyy or Ssyy

If you count them there are 3 of them

- In recessive for the first trait and dominant for the second we have two possibilites ssYY or ssYy

So, we see that again we have 3 cases

- Finally, for recessive for both trails the only possibility is ssyy

We have just one case (the one is left in the chart)

You can write it like this: 9:3:3:1

4 0

1 year ago

Which term also describes selective breeding? natural selection artificial selection survival of the fittest overproduction of o

Yuki888 [10]

Answer:

The correct answer is : artificial selection.

Explanation:

Selective breeding is also known as the artificial selection as there is the selecting agent is human instead of nature or environment and the characteristics are desired or selective instead of advantageous.

In this process the selective agent that is humans selects the desired characters or traits by choosing in a particular animal or plants that might produce sexually and have offspring with desired character.

Thus, the correct answer is : artificial selection.

7 0

3 years ago

Help please ?????????

ratelena [41]

I think the answer is B

4 0

4 years ago

Read 2 more answers

What pigment traps the energy?

Vadim26 [7]

The pigment that traps energy is Chlorophyll. Chlorophyll is a green pigment commonly found in almost all plants, algae and cynobacteria. Leaves appear green because they contain this pigment. This pigment absorbs the light energy from the sun to complete the process of photosynthesis or food production of plants. Chlorophyll is said to absorb light in the long wavelength and blue in the short wavelength regions of the visible light spectrum. Green light is not absorbed, thus making the leaves of some plants green. Chlorophyll is found at the plant’s chloroplasts, which comes to have different structures.

3 0

3 years ago

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