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jonny [76]
4 years ago
5

"Plants could readily develop seasonal responses for flowering based on temperature changes but have "elected" through evolution

to manage their rhythms based on a comparison of daylight and darkness. Why has the day-night ratio system been selected?"
Biology
1 answer:
weqwewe [10]4 years ago
5 0

Answer:

Temperature is a gradation but day/night is all-or-nothing

Explanation:

Temperature change is progressing. I.e from Hot to cold, it moves gradually along a gradient. But Night and Day is a two edged variance. It's either day or night, also know as the All-or-nothing .

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_____________ is the neurotransmitter involved in muscle contractions.
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Acetylcholine, sometimes shortened to ACh.
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What is the answer i’m unsure of C
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True of false: Hair and nails are a part of the integumentary system.<br> True<br> False
IRISSAK [1]

Answer:

Your answer is A). True.

Explanation:

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5 0
3 years ago
Quincy has type B blood.
Irina-Kira [14]

Answer:

IBi and IBIB

Explanation:

Blood group in humans is determined by a single gene with three alleles (iA, iB and i). Alleles iA and iB are both dominant over i. This means that i allele will only be expressed in a homozygous state.

In the ABO blood group system, individuals will possess the following blood types when they possess the following genotypes:

Type A- iAiA or iAi

Type B- iBiB or iBi

Type O- ii

Alleles iA and iB are codominant, this means that they both phenotypically express themselves when combined as neither is dominant or recessive to the other. Hence, in an heterozygous state;

iAiB, the blood type of the individual will be Type AB.

Following this, Quincy with a type B blood will possess an allelic combination of iBiB (homozygous) or iBi (heterozygous) in her genotype.

4 0
3 years ago
Read 2 more answers
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