Molecular phylogenies show all land plants are a monophyletic group. This suggests that _____
A) there were many different transitions from aquatic to terrestrial habitats
B) wind-pollinated plants arose first
C) land plants have undergone a diversification since they first colonized terrestrial habitats
D) there was a single transition from aquatic to terrestrial habitats
Answer: D
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The function of adenylyl cyclase is to:
A. catalyze the conversion of ATP to cAMP. B. cleave PIP2 into DAG and IP3. C. directly activate protein kinase A (PKA). D. stimulate the release of calcium from the endoplasmic reticulum.
Members of which prokaryotic domain are most closely related to eukaryotes evolutionarily?
a. animals b. protists c. fungi d. bacteria e. archaea
What type of cells do not undergo mitosis?
A) All cells of the body except gametes (i.e., only somatic cells) B) Gametes C) Both somatic cells of the body and gametes D) Neither somatic cells of the body nor gametes
What does a cell of prokaryotic type lack that differentiates it from a cell of eukaryotic type?
a. a plasma membrane b. a nucleus c. DNA d. chromosomes