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Nina [5.8K]
3 years ago
13

What is the structural level of a plant leaf? A Organism B Tissue C Cell D Organ

Biology
2 answers:
tatiyna3 years ago
6 0

Answer:

Cells

Explanation:

they use mitosis for food

Strike441 [17]3 years ago
4 0

Answer:

The internet says tissue, but I`m doubting that a bit. It`s still the best answer of the 4, sorry

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The myosin head contains binding sites for what two molecules
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<span>I think it's right, sorry if its not. ATP binding site Actin binding site</span>
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Archaeopteryx fossils show that the animal had feathers like a bird. It also had a bony tail, teeth, and claws on its wings like
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What is radiation
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The answer to this is C- electromagnetic waves.

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3 years ago
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A new kind of tulip is produced that develops only purple or pink flowers. Assume that flower color is controlled by a single-ge
Sophie [7]

Answer:

a. purple allele (C) = 0.609, pink allele (c) = 0.391

b. purple homozygotes = 371, pink homozygotes = 153, heterozygotes = 476

Explanation:

Given -

Purple flowers - 847

Pink flowers - 153

The frequency of recessive genotype i.e

q^ 2 = \frac{153}{1000} \\q^ 2 = 0.153\\

Frequency of recessive allele i.e q is equal to

q = \sqrt{0.153} \\q = 0.391

As per hardy Weinberg's first equilibrium equation -

p + q = 1\\p = 1-q\\p = 1-0.391\\p = 0.609

Frequency of purple homozygous species

= p^2\\= 0.609^2\\= 0.371

Number of purple homozygous species = 0.371 * 1000= 371

Number of pink homozygous species = 0.153 * 1000= 153

Heterozygous species is equal to

(1-0.371-0.153)* 1000\\= 0.476 * 1000\\= 476

5 0
3 years ago
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A second action potential cannot be generated until ________.
Bingel [31]

Answer:

"Action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern."

It is the mode through which a neuron transports electrical signals.

Explanation:

  • Option - (a) is the best choice to choose from,
  • <u>The refractory period :</u>

A second action potential cannot occur until the membrane has recovered or reestablished, this is the refractory period. The absolute refractory period coincides with inactivation of voltage-gated sodium channels which makes it impossible to generate another nerve impulse.

5 0
3 years ago
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