QuestionOwl
Sign In Ask Questions

Biology

Using species C as a reference, you find greater genetic differences between species A and C than between species A and B. Which statement best reflects the mode of speciation in these mice?

Why is it important to identify all the variables involved in creating a disease state in certain individuals?

Region A has a low solute concentration, while Region B has a high solute concentration. A selectively permeable membrane, which is impermeable to the solute but allows water to pass through, separates them.

The modern synthesis theory states that evolution involves changes in populations.

Explain why the presence of a pelvis is not an important adaptation to life in the ocean

A species of beetle expresses a pigment protein as an adult but not as a juvenile. The pigment is encoded by the gene PIG. A protein called KID, which is only present in juveniles, is a transcription factor that binds to the DNA near the protein-coding sequence for PIG. Do you think KID is a negative regulator of PIG or a positive regulator? Why? Some individuals in the species never express the pigment (neither as a juvenile or as an adult). Do you think they have a mutation in the KID gene, the KID binding site, or in the protein-coding part of the PIG gene? Why? (the ‘why’ part of the question will only be used to help us give possible credit for answers different than what we think is the clearest answer)

Which term describes the position of a gene on a chromosome? A: Centromere B: Genotype C: Locus D: Phenotype A man who is red-green color-blind marries a woman who is neither color-blind nor a carrier of this trait. Which statement best describes their probable offspring? A: All of their sons would be color-blind. B: All of their children would be color-blind. C: 50 percent of their sons would be color-blind. D: None of their children would be color-blind, but all of their daughters would be carriers.

If evolution is going to occur as a result of natural selection, what must be true about the trait that is being studied? a. All forms of the trait have the same impact on survival. b. The trait is passed on genetically to the next generation. c. The trait is resistant to mutations. d. The trait is the same for all organisms.

Which factors are associated with the sickling of red blood cells in sickle cell disease? These include high oxygen concentration, high temperature, dehydration, and low pH.

Liver cells are responsible for the detoxification of the blood from chemicals. Which organelle would be found in higher concentrations in cells of the liver to aid in the detoxification process?

2541 - 2550 of 3569