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3 years ago

How long can hermit crabs go without food and water?

1 answer:

3 0

Hermit crabs live in large colonies so there is no real answer. You can put up to 10 hermits in a 10 gallon aquarium or 4 to 6 in the smallest plastic cage safely. They do eat but very little and can go several days up to two weeks without food. They store water in the back of their shell for moisture for their gills.

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How does rough ER from smooth ER?

irinina [24]

Answer:

Rough endoplasmic reticulum differ from smooth endoplasmic reticulum by the presence and absence of ribosomes in their surface.

Explanation:

Rough endoplasmic is named so because RER contain ribosomes at their surface and due to the presence of ribosomes rough endoplasmic reticulum play an importnt role in protein synthesis or translation.

Whereas smooth endoplasmic reticulum does not contain any ribosome in its surface.smooth endoplasmic reticulum helps in the biosynthesis of lipid and steroids along with detoxification of toxic compounds.

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3 years ago

For a mutation to be passed to offspring, in what type of cell must it occur?

AVprozaik [17]

Answer:

Germ Cell DNA.

Explanation:

Mutations are only passed on to offspring when they occur in germ cell DNA, which are the cells that create sperm or ova.

mutations only occur in germ cells and their DNA.

4 0

3 years ago

Explain Mendel's law of independent assortment and how the 9:3:3:1 phenotypic ratio among the F2 of a dihybrid cross provides ev

GrogVix [38]

Answer:

Explanation:

Mendel's law of independent assortment state that two different genes assort independently in gamete formation.

To reach this conclusion, one has to do a dihybrid cross. This means that two genes responsible for different traits need to be analyzed at the same time.

1) Starting with a parental generation of a cross between two pure lines (homozygous for both genes) with different traits, a plant with yellow and round seeds (YYRR) and another with green and wrinkled seeds (yyrr). The F1 will be phenotypically homogeneous (yellow and round), and genotypically heterozygous (YyRr).

2) If the individuals from the F1 are crossed with one another, we have to do a Punnett Square to determine the phenotypic ratio of the F2.

If the genes assort independently, the F1 individuals will produce their different gametes with the same probability. Each possible gamete will appear in a 1/4 proportion: YR, Yr, yR, yr.
The 9:3:3:1 ratio is a result of analyzing the possible phenotypes that result from the dihybrid cross.

See the attached image for an illustration of the crosses in each generation and the Punnett Square.

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3 years ago

Why is the blood that drains into the hepatic portal circulation nutrient-rich

Lelechka [254]

Answer:

Explanation:

hepatic portal vein is a blood vessel that carries blood from the gastrointestinal tract and spleen to the liver. This blood are usually rich in nutrient because it contains extraction from digested materials or food substances in the gastrointestinal tract and it is processed in the liver for removal of toxins before the blood returns to the heart.

4 0

3 years ago

The main function of the inflammatory response is 1.to initiate the production of antibodies. 2.remove contaminating microorgani

masya89 [10]

Answer:

3.initiate repair of damaged tissues.

Explanation:

Inflammation is a process or response that occurs when the immune cells produce substances in order to protect the body from injuries infection by foreign microbes like viruses and bacteria. The main functions of inflammation or inflammatory response are to remove the cause of injuries in cell, get rid of damaged tissues and necrotic cells that might have been damaged during injury and initiate the repair of damaged tissues.

During inflammatory response certain symptoms like redness, heat/warmth, swelling and pain are most likely to be experienced.

4 0

3 years ago