order of the phases of mitosis
What will be an ideal response?
prophase-->metaphase-->anaphase-->telophase
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What sequence of events leads to the perception of a visual scene?
I. In response to light, retinal dissociates from rod and cone photopigments, hyperpolarizing the photoreceptor cells and leading to activation of bipolar neurons. II. Action potentials are propagated through ganglion cells, whose axons project to the occipital lobe of the brain. III. In response to light, rod and cone photoreceptors depolarize, causing increased release of neurotransmitter and activation of bipolar neurons. A. I then III B. III then II C. III then I then II D. I then II then III E. I then II
Red blood cells are
a. erythrocytes. b. leukocytes. c. platelets. d. all of the above.
If there were a high allele frequency for the CCR5-32 coreceptor, and the rate of infection with HIV was high as well, one would expect the frequency of the CCR5-32 coreceptor allele to ________
A) remain the same due to the lethality of AIDS B) remain the same due to the population maintaining Hardy-Weinberg equilibrium C) fall quickly due to heterozygote selection D) rise quickly and confer resistance on a large part of the population
Explain how the number of valence electrons is related to the chemical properties of an atom. Use two
specific examples in your explanation. What will be an ideal response?