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mixer [17]
3 years ago
8

Which of the following statements about positive feedback mechanisms is not true?

Biology
1 answer:
Hunter-Best [27]3 years ago
5 0

Answer:

The correct answer is d  the positive feed back reduces change in the the system

Explanation:

In an  biochemical reaction when the released product stimulate the release and activation of the same product and act together to exibit their biological function, then this type of regulation is called positive feedback.

     The positive feed back mechanism leads to increased change in the system that"s why it is named so.

    For example during blood clotting platelets molecules are released to form clots to stop bleeding. one activated platelet can stimulates the activity of other platelets which then join together to form a group for generating further blood clots.

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3 0
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Describe the location of the brain to the spinal cord
allsm [11]

Answer:

Explanation:

The Spinal Cord starts at the brain stem and goes to the tail bone.

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The bones in a whale’s flipper are the same as the bones in a dog’s front leg. What does this tell you about these two organisms
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They Have a common ancestor......

Hope this helps 
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3 years ago
Read 2 more answers
Black fur in mice (
Tpy6a [65]
The answer is D) 1/2.

Let's imagine that two genes of the genotype can be analysed separately.

Black fur is determined by dominant allele B. In this case, parents Bb and BB will give offspring with only brown fur:
Parents:          Bb     x     BB 
Offspring:     BB   BB   Bb   Bb
Both homozygous (BB) and heterozygous (Bb) offspring will have black fur.

On the other hand, long tails are determined by recessive allele t. Parents Tt and tt will have 50% offspring with short tail and 50% offspring with long tail:
Parents:         Tt         x       tt
Offspring:    Tt      Tt        tt      tt
Heterozygous offspring (Tt) will have short tail, and homozygous offspring (tt) will have a long tail.

So, the offspring will definitely have black fur and will not affect the fraction of the offspring with black fur and long tails from the cross of <span>BbTt × BBtt. But, </span>there will be 2 out of 4 offspring with short tails which is 50% or 1/2. 
5 0
3 years ago
Amoebas are unicellular. The single cell splits in half to form two new cells. A student claims amoebas are
Alexus [3.1K]

Answer:

If you watch carefully how the amoebas move, you're likely to find legs squirming and wiggling around trying to cover space. So this proves amoebas are alive.

Explanation:

Amoebas are living organisms belonging to the kingdom Protista. They are single-cellular organisms that move by extending and moving pseudopodia, extensions of their cellular membrane.

6 0
3 years ago
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