Answer:
Prokaryotes are surrounded by a _<u>plasma membrane</u>_that regulates the entry and exit of materials through the cell, the cell wall to help maintain cell shape and structure, and the capsule bateria, which increases the ability of pathogenic bacteria to cause disease.
Explanation:
Procatyotic cells do not have a nucleos that surround the genetic material, but ther do have a plama membrane that regulates the entry and exit of materials trough the cell. Also the capsule bacteria is a layer that is outside de cell and can cause a disease.
Commensalism is a situation in nature where there is an association between two organisms that benefits one but does not help nor harm the other.
Let's go through each example in order to find one with commensalism.
A). Honey bees that feed on the pollen of cornflowers and help the flowers reproduce.
This is not a form of commensalism as both organisms mutually benefit from the association.
B). Barnacles ride on a gray whale's back to obtain food, and the whale is not harmed.
This is a form of commensalism. The barnacles benefit from riding on the whale's back as they obtain food. The whale is also unharmed in the process.
C). Squirrels and chipmunks eat the same nuts in a forest where food is scarce.
This is not a form of commensalism as neither organism benefits. There is an increased competition for food that harms both of the organisms.
D). Prairie dogs often collect and eat food in groups so they are better protected from enemies.
This is not a form of commensalism as the interaction of the organisms is within the same species. In order for commensalism to take place, two different species must interact.
The best example of commensalism is B.
Answer:
C. Primers are short sequences that allow the initiation of DNA synthesis.
Answer: All of the answers are correct.
Explanation:
Membrane proteins are sometimes covalently attached to lipid moieties. They're also composed of the same 20 amino acids found in soluble proteins and diffuse laterally in the membrane unless they are anchored. They're sometimes covalently attached to carbohydrate moieties as well.
Therefore, the correct option is All of the above.
1.
a. Bb
b. bb
c. Gray, because the male is homozygous recessive, which indicates the recessive trait is black.
d. Gray-Female, Black-Male
e. B b
b Bb bb
b Bb bb
f. There's a 50% chance the babies will be heterozygous (for gray) and there's a 50% chance the babies will be homozygous recessive for black.
g. There's a chance that all four offspring won't adhere exactly to the ratios predicted by the Punnett Squares, because male offspring can only have one trait (on the X).
Hope this helps. I hope you understand that heterozygous is (Big Letter & Small letter) and homozygous is either: Big Letter Big Letter OR Small Letter Small Letter. Have a great night and I hope you are successful in your class!
