A mutant plant is found in which the seeds germinate far too early. Which hormone is likely involved
and why? What will be an ideal response?
It is likely that abscisic acid is involved. Abscisic acid accumulates in seeds and prevents their
germination. Only when the abscisic acid levels decline can gibberellins be synthesized and
germination begin. The premature germination of these seeds suggest an issue with abscisic acid.
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The Reznick and Endler guppy study showed
that killifish and pike-cichlids raised in natural conditions will a. affect the age at first reproduction of the guppies that live with them. b. prey on guppies. c. affect the growth rate of guppies. d. affect the evolution of the guppies' life history traits. e. do all of these
When a cell is placed in a hypotonic solution,
a. solute exits the cell to equalize the concentration on both sides of the membrane. b. water exits the cell toward the area of lower solute concentration. c. water enters the cell toward the area of higher solute concentration. d. there is no net movement of water or solute.
What is believed to be the origin of both mitochondrial and chloroplast organelles?
What will be an ideal response?
Answer the following questions true (T) or false (F)
1. If a person has a recessive trait, the genotype must be homozygous recessive for the trait. 2. When two individuals with different traits are crossed, either the dominant or the recessive trait, and not an intermediate trait, is always seen, no matter what the organism or phenotype. 3. Women do not express X-linked recessive characters.