The seed develops from the
a. gametophyte.
b. ovary.
c. ovule.
d. pollen grain.
e. zygote.
C
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Is the number of chromosomes in each cell of an organism a good indicator of the complexity of that organism?
A. It depends on the type of cells of the organism. B. Yes, the number of chromosomes indicates how complex an organism is. C. Yes, the number of chromosomes is a good indicator of an organism's complexity, but the amount of DNA matters even more. D. No, the number of chromosomes does not indicate how complex an organism is.
Arrange the following in the proper order in which they occur.
1. Binding of ligand to receptor site 2. Dissociation of G protein subunits 3. Diffusion of calcium ions into the cell
Which of the following was NOT one of Darwin’s
observations? a. Most individuals have an equal chance to survive and reproduce. b. Changes in populations are gradual and take place over long periods of time. c. Members of the same species may exhibit considerable variation. d. Some characteristics are heritable and passed on to offspring. e. Some characteristics afford their possessor a better chance of survival.
Mina had a throat infection; in a few days it had spread to her ear. What part of her ear would be affected first?
A) external auditory canal B) pinna C) inner ear D) middle ear