Why does sexual reproduction produce more genetic variability in a population?
A. Offspring are genetically identical to one parent.
B. During sex adults can exchange genetic material thus increasing their variability.
C. Organisms arising from sexual reproduction can change their genetic material in response to environmental changes.
D. Sexually-reproducing organisms mutate more rapidly than asexually reproducing organisms.
E. Offspring are a genetic mix of both parents.
E. Offspring are a genetic mix of both parents.
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Answer the following statements true (T) or false (F)
1. Sodium and potassium ions can easily diffuse through the lipid bilayer of plasma membranes. 2. Transport of salts against their concentration gradients is energetically expensive. 3. If you measured the urine concentration of a freshwater fish, you would find that it was more concentrated than its blood. 4. If you measured the urine concentration of a saltwater fish, you would find that it was more concentrated than its blood.
In normal cells, cell adhesion molecules are partially responsible for the ability of cells to ____
a. migrate to new locations in the body b. recognize other cells as "self" c. exocytosis d. both migrate to new locations in the body and recognize other cells as “self” e. recognize linkages between cells in muscle and bone
Phenylalanine hydrolase is an enzyme produced by the liver to break down the amino acid phenylalanine. Why would phenylalanine accumulate in patients with phenylketonuria?
A. They lack an inhibitor of the enzyme to break down phenylalanine. B. They produce too much phenylalanine. C. They lack the enzyme to break down phenylalanine. D. They lack the enzyme to produce phenylalanine.
Diagram and label a cross section of a primary eudicot root. Identify the function of three of the labeled tissues. What will be an ideal response?