Dolly developed an infection in her lungs and was
euthanized at the age of about
a. two months.
b. two years.
c. three years.
d. six years.
e. nine years.
Answer: d
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When yeast cells of opposite mating types are in close proximity, cell changes occur inside those cells that result in the polymerization of actin filaments, allowing the yeast cells to mate
Those changes in cell behavior are initially due to signaling molecules (pheromones) released by the yeast cells. Pheromones are A) a type of steroid hormone that diffuses through the plasma membrane causing cytoplasmic actin proteins to form filaments B) a type of hormone that binds cell surface receptors causing cytoplasmic actin proteins to form filaments C) signaling molecules that bind cell surface receptors causing yeast cells to become motile, insuring mating success D) signaling molecules that cause the extracellular matrix of yeast cells to thicken in preparation for cell fusion E) signaling molecules that cause intracellular G proteins to be inhibited
The carbon dioxide that we breathe out is a breakdown product of cellular respiration; the
carbon atoms come primarily from which molecules?
a. glucose b. proteins c. oxygen d. water
A display of data obtained from scientific experiments can often be described using a(n) ________ to clarify the meaning of experimental results
Fill in the blank(s) with correct word
For a prokaryote cell to divide, which of the following must occur?
a. A reproductive signal, replication, segregation of DNA, and cytokinesis b. DNA replication, crossing over, and segregation of DNA c. DNA replication and segregation of DNA d. Cell growth and cytokinesis e. DNA replication, segregation of DNA, and cytokinesis