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madam [21]
3 years ago
5

Why does a tundra lack trees

Biology
2 answers:
snow_tiger [21]3 years ago
8 0
There is too much ice there
Yanka [14]3 years ago
7 0
Tundras are basically frozen deserts and cannot harbor large sums of life, there are not enough nutrients for trees to grow. 
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Dafna1 [17]

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Explanation:

6 0
3 years ago
Mutation is an important mechanism for evolutionary change. Which type of mutations contribute to evolution?
Aneli [31]
<span>Both somatic and germinal mutations are contributors of evolution. Somatic mutations occur within tissues of individuals that give the said individual differing traits and characteristics. Germinal mutations occur in reproductive cells that can be passed on to offspring, altering their traits and characteristics.</span>
7 0
3 years ago
Would would be the possible gamete combinations?
Likurg_2 [28]

Answer:

1/4 WR; 1/4 wr; 1/4 wR; 1/4 Wr

Explanation:

The principle of independent assortment indicates how different genes independently separate from one another when gametic (reproductive) cells develop. When a cell divides by meiosis, homologous chromosomes are randomly distributed to daughter cells, thereby different chromosomes segregate independently of each other. In consequence, each gamete has a unique combination of chromosomes. In this case, the two genes are on different homologous chromosomes, thereby gene variants (alleles) will be randomly distributed to daughter cells during meiosis (anaphase I) and thus the expected proportion of gamete genotypes will be 1/4 WR, 1/4 wr, 1/4 wR, 1/4 Wr.

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3 years ago
If you lose a finger, the somatosensory cortex that received its input will begin to pick up signals from the neighboring finger
a_sh-v [17]

If you lose a finger, the somatosensory cortex that received its input will begin to pick up signals from the neighboring fingers. this best illustrates the concept of neuroplasticity. The neurons rewire themselves to participate in the functioning of other nearby brain regions. Another consequence of this in the experience of the presence of a phantom limb or finger. The brain activates that region to signal the muscles of the absent limb and confuses itself in the absence of any feedback from it.

3 0
3 years ago
Which of the following types of models could be used to represent a cell? a.idea model. b.physical model. c.computer model. d.al
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<span>The answer is letter D. all of the above. A cell may be represented in different models such as an idea model, a physical model and even a computer model. A cell in physical model may be a larger or smaller physical model that picture outs the parts of a cell, while in an idea model, a cell may be given analysis and descriptions and lastly, on a computer model, a cell may look animated or realistic depending on its graphical representation.</span>
7 0
3 years ago
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