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Afina-wow [57]
1 year ago
8

Like rods, cone cells are depolarized when their opsin molecules are inactive. In the case of a cone, why might it be misleading

to call this a dark response?
Biology
1 answer:
Olenka [21]1 year ago
5 0

The most responsive of the three different types of cones to various light wavelengths. When light is present, a cone may become entirely depolarized if the sunlight is of a wavelength that is not optimal.

<h3>What do the eye's rods and cones do?</h3>

Rods are in charge of seeing in dimly lit environments (scotopic vision). They have poor spatial acuity and do not integrate color vision. Cones are responsible for color vision, high spatial acuity, and activity under higher light levels (photopic vision).

<h3>In the eye, how many rods are there?</h3>

The total number of rods inside the human retina (91 million) is significantly higher than the total number of cones, despite the fact human perception of average daytime ambient light is dominated by cone-mediated vision (roughly 4.5 million). As a result, over the majority of the retina, rod density is substantially higher than cone density.

To know more about the eye's rods and cones visit:

brainly.com/question/13285401

#SPJ4

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When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
baherus [9]

Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

In one chain of  heating and cooling  of polymerase chain reaction (PCR), the strands of DNA gets doubled.

The general mathematical representation of this is

{2^n - (2 *  n)}

where "n" is the number of PCR cycles.

It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
2 years ago
Which describes the missing step?
Nimfa-mama [501]

Answer:

The missing step is oxygen is removed from the water after step 3.

Explanation:

The steps listed by Xavier are:

  1. <em>Water is drawn in trough pores and enters the central cavity. </em>
  2. <em>Food is filtered and digested. </em>
  3. <em>Water leaves trough an opening at the top of the body.</em>

Porifera or sponges are aquatic, immobile invertebrates whose structure is saccular with an upper opening, the osculus.

Sponges absorb water through their pores, where the porocytes are found, and through flagellated cells -the coanocytes- the movement that allows the entrance of water to the spongocele or atrium is produced, in addition to the phagocytosis of organic elements.

Once the water is in the interior chamber of the sponges, the organic particles are phagocyted to be digested, and the oxygen is removed from the water, and passes through diffusion into the cell.  The waste products, as well as carbon dioxide, are released into the water that will be expelled through the osculus.

<u><em>In Xavier's list, the missing step is the removal of oxygen from the water, before it is expelled from the body of the sponge</em></u><em>.</em>

<em />

Learn more:

Sponge structure brainly.com/question/11256747

6 0
3 years ago
What are examples of directional selection
sertanlavr [38]
Some examples could be Giraffes with long necks and the darkening of London's peppered moths after the industrial revolution.  Direct selection is the shift of the population of one species towards a certain phenotype. -reference.com
8 0
3 years ago
Last year there were 10 goldfish in the pond, and this year there is 5. How would you describe the percent ´growth´ of this popu
Snowcat [4.5K]

Answer:

Decreasing.

Explanation:

Last year= 10 goldfish

This year= 5 goldfish

The amount in goldfish is decreasing.

3 0
2 years ago
Please help thank you
Bingel [31]
I believe it’s the first, third and fourth ones. I might be wrong and I’m sorry if I am.
8 0
2 years ago
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