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4 years ago

Which of the following is not a key advantage provided by the exoskeleton of terrestrial arthropods?

Biology

1 answer:

Nataly_w [17]4 years ago

3 0

Answer:

Grows with the arthropod throughout its life

Explanation:

The exoskeleton, unlike the human skeleton, is a tough but flexible layer that covers the body of many animals, especially invertebrates, and protists. It is important to remember that this is not formed by bones. According to the animal its composition changes.

The main function of the exoskeleton is primarily to protect the tissue and internal organs of the living being, but in some cases it prevents the growth of animals. That in these cases need to perform the ecdysis, a process in which the animal leaves its exoskeleton to increase in size, as an example of this process we have the cicada. In this context, we can confirm that the exoskeleton does not grow with arthropod throughout its life.

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Which statement best describes the growth of the dandelions?

umka21 [38]

Answer:

C: Exponential growth occurs because the field provides unlimited resources during the summer.

Explanation:

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7 0

3 years ago

RNA is translated into

Volgvan

B. DNA.

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3 years ago

Match the functional groups with their structures:

evablogger [386]

The true answer of your question is :

OH : HYDROXYL GROUP

NH2 : AMINO GROUP

CH3 : METHYL GROUP ( but in rather broader terms, that functional group of formula CnH2n+1 where n is an integer is called ALKYL GROUP where by substituting n by 1,2,3... we obtain methyl for n = 1, ethyl for n = 2, and propyl for n = 3 )

COOH : CARBOXYL GROUP is the correct answer since carbonyl is characterized by the presence of functional group C=O in general the formula of the compound would be
R-C=O-R’ where R and R’ are alkyl groups like methyl for example. However the carboxyl group could be thought of as a summation of carbonyl + hydroxyl ( CO + OH ) resulting thus in COOH.

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7 0

4 years ago

You perform the following dihybrid cross: A blaBx Ab/aB. The A and B genes control different traits. What phenotypic ratio would

Luda [366]

Answer:

Option-D

Explanation:

In the given question the genotype of parental allele is- AbaB X AbaB. The alleles formed will be- AB, Ab,aB, ab in which the crossover allele will be AB and ab.

1. Unlinked genes

Now of these alleles are unlinked then the alleles will assort independently of each other therefore performing the punnett square we will get dihybrid ratio as 9:3:3:1 in which

1. A_B_ are 9

2. aaB_ are 3

3. A_bb are-3

4. aabb- 1

Since the crossover allele are AB and ab therefore A_B_ are 9 and aabb- 1 represent recombinant genotype.

2. Linked genes

When the genes will be linked then chances of crossing over will be reduced as a result of which only two type of allele will be formed which are- Ab and aB and the recombinant frequency will become less.

Crossing these allele will form Aabb , AaBb , AaBb and aaBB genotypes. The recombinant ratio will decrease as A_B_ is 2 and aabb is not present.

Thus, option-4 which states that the unlinked ration is 9:3:3:1 and linked ratio is <9: >3: >3: <1 is correct.

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3 years ago

Why do people with albinism lack melanin

Luden [163]

Albinism is a disease in which a person has partial or complete loss of pigmentation (coloring) of the skin, eyes and hair.

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3 years ago