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professor190 [17]
2 years ago
10

1. In cell membranes with aquaporins can water move across the membrane?

Biology
1 answer:
zhannawk [14.2K]2 years ago
7 0

Answer:

1.B. Yes, water is able to pass across the membrane through the aquaporins

2.A. Neither NaCl nor water can move across the cell membranes.

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In a population of grasshoppers, the color green (G) is completely dominant over the color brown (g). If 23% of the population i
barxatty [35]
The answer is 49.92%

Let's use the <span>Hardy-Weinberg principle:
p + q = 1
p</span>² + 2pq + q² = 1
<span>
where:
p - the frequency of dominant allele G
q - </span>the frequency of recessive allele g
p² - the frequency of homozygous dominant individuals GG with colour green
2pq - the frequency of heterozygous individuals Gg with colour green
p² - the frequency of homozygous recessive individuals gg with color brown

23% of the population is brown: p² = 23% = 0.23
p = √(p²) = √0.23 = 0.48

p = 0.48
p + q = 1
0.48 + q = 1
q = 1 - 0.48 = 0.52

<span>The percentage of the population that is expected to be heterozygous is 2pq:
2pq = 2 * p * q = 2 * 0.48 * 0.52 = 0.4992 = 49.92%</span>
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1 year ago
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Explain how a streamlined, smooth, nearly hairless body is a beneficial adaptation for marine animals.
lana66690 [7]

Most of the marine animals have a stream lined body, which means, they have a sharp and pointed at the front. The pointed front of the organism allow to cut the resistance of the water. In case, the body is not pointed at the front and it is blunt, the water current and flow would resist the movement of the organism further. So, for the locomotion purpose, it is important to have a streamlined body. Further smooth and hair less body also decrease the resistance during the movement in the water.

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Which ingredients are needed to transform NADP+ to NADPH?
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Answer: Two electrons and a hydrogen ion

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If a postsynaptic neuron is stimulated to threshold by spatial summation this implies that ________. If a postsynaptic neuron is
Maslowich

Answer:

The postsynaptic cell has many synapses with many presynaptic neurons

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Spatial summation is a process of producing an action potential in a neuron with input from multiple presynaptic nerve cells. This process determines whether an action potential will be triggered upon reaching threshold from multiple synapses with presynaptic neurons. Summation of all inputs determines if an action potential will b generated.

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2 years ago
Which is a waxy, water-repelling outer covering of a plant?
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A Cuticle, because a cuticle is waxy and it repels water and covers outside of a plant. Unlike a seed, phloem, ad xylem. If you think about your nails wouldn't you think cuticle as well? 
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