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Andrew [12]
3 years ago
9

The direction of shell coiling in the snail Lymnaea peregra results from a genetic maternal effect. An autosomal allele for a ri

ght-handed, or dextral, shell (s+) is dominant over the allele for a left-handed, or sinistral, shell (s). A pet snail named Martha is sinistral and reproduces only as a female. Which one of the following statements is true?
a. Martha's genotype must be SS. T or F
b. Martha's genotype cannot be Ss. T or F
c. At least some of Martha's offspring must be sinistral. T or F
d. Martha's sisters must be sinistral. T or F
Biology
1 answer:
irakobra [83]3 years ago
7 0

Answer:

Atleast some of Martha's offspring must be sinistral.T or F

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Answer:

A. The government

Explanation:

8 0
3 years ago
(a) What cell structures best reveal evolutionary unity?
xeze [42]

Answer:

The correct answer will be-

1. Evolutionary unity-  DNA

2. specialized cellular modifications- plant cells have chloroplasts and large central vacuole.

Explanation:

<u>Case I </u>

Evolutionary unity is a concept which explains that all the organisms possess some common structure or universal structure or molecules.

The best characterized evolutionary molecule is DNA molecule which took the role of genetic material in past and is passed on to the daughter cells and still is made up of the same components which are a five-carbon sugar, four types of nitrogenous bases and a phosphate group. This DNA molecule is present in almost every organism except for a few viruses.

<u>Case II </u>

The specialization of the cellular components depends on the function a cell has to perform which became established in the population. The plant cells depended on the sunlight to prepare food for themselves which was done by the chloroplast organelle which is absent in the animal kingdom.

7 0
3 years ago
A)
timofeeve [1]

The reaction shown in the question is an inversion reaction.

The conversion of maltose to glucose is an inversion reaction. An inversion reaction is said to have occurred when the atoms and groups in a molecule are rearranged. The numbers and type of each atom in a molecule remains the same.

The reaction; Maltose +A -> Glucose + B is an example of an inversion reaction. The missing items A and B are both the catalyst maltase.

Learn more about inversion reaction: brainly.com/question/24770362

3 0
3 years ago
Free earlobes hang below the point where the ear lobe attaches to the head. Attached earlobes do not hang, but are attached to t
kkurt [141]

Answer:

the answer is C

Explanation:C

7 0
3 years ago
In a symbiotic relationship, A a parasite eats its host. B there are too many carbon emissions in the atmosphere. C the environm
cupoosta [38]

Answer:

D two organisms depend on each other for survival.

Explanation:

Symbiotic relationship is a type of relationship between two organisms in which the both of them gain something positive from each other. A good example is the relationship between the cattle and egret. The egret helps in grooming the cattle and the cattle in return provides food for the egret.

In a symbiotic relationship, two organisms depend on each other for survival and is the right choice in the above question.

8 0
3 years ago
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