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ExtremeBDS [4]
3 years ago
8

Why are beavers a keystone pecies

Biology
1 answer:
oee [108]3 years ago
7 0
They construct dams and create an ecosystem for other species . Because of their dam building nests become available for birds, fish population increases and waterfowl population goes up
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Which of the following represents an example of Mullerian mimicry?
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<em>the correct option for this is B>></em>
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The frog population in the amazon basin varied. Every 500 years, there was a mutational change leading to speciation. In between
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Punctuated Equilibrium
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Which statement provides a possible explanation for the growth
Shtirlitz [24]

Answer:

<u>3) Uncontrolled cell division occurred as a result of gene mutations</u>

<u />

Explanation:

Spontaneous modifications within the genome may occur during the process of cell division. When copies of the DNA inside the cell are made, these mutations cause errors; and can include small single nucleotide polymorphisms, and large scale additions or deletions across multiple genes.

Some, like somatic mutations, exist only inside vegetative (body) cells, that cannot be passed onto offspring. This is caused by several factors like

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UV radiation damages strands of DNA, by causing dimers to form; here, consecutive nucleotide bases covalently bond instead of those on the complementary strand. This conformational change causes errors in DNA proofreading and repair mechanisms where bases are not well-incorporated into the strand- tumors (clumps of uncontrolled cell growth) may form, resulting in melanoma, a type of skin cancer.

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3 years ago
Urinary tract infections are commonly caused by Staphylococcus saprophyticus and Escherichia coli, less commonly caused by Prote
Delicious77 [7]

Answer:

B. MacConkey is both a differential and a selective medium.

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Differential media allow to differentiate between selected microbes by visual observation.

For Example MacConkey media differentiate between organisms that can ferment lactose to the organisms that can't ferment it. That why E. coli appeared pink on the media because it can ferment lactose while P. mirabilis appears colorless because it usually cannot ferment lactose.

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The "jar was full of air fouled by breathing" probably contained an excessof what gas?
Dimas [21]
The answer is carbon dioxide.
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2 years ago
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