When is a bacterial cell more likely to be phagocytized?
A) when antibody binds antigen on its surface
B) when compliment binds an antigen-antibody complex
C) when antibody recognizes self antigens
D) after antibody class-switching
Answer: B
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Testosterone is an example of a chemical signal that affects the very cells that synthesize it, the neighboring cells in the testis, along with distant cells outside the gonads. Thus, testosterone is an example of _____
I) an autocrine signal II) a paracrine signal III) an endocrine signal A) only I and II B) only II and III C) only I and III D) I, II, and III
Genetic map units represent
a. absolute physical distances between genes. b. locations of different alleles of a gene. c. the chromosome on which a given gene is located. d. the actual DNA sequence of a gene. e. relative positions of genes with respect to each other.
The transmission of information from one neuron to another has been found to occur by all of the
following mechanisms EXCEPT
a. neurotransmitters released from vesicles. b. components of a membrane can act as neurotransmitters. c. electrical connections. d. chemical signals transmitted through electrical connections. e. a gas that diffuses through a cell membrane.
Explain why the seed plants would have an advantage over the seedless plants within a community.
What will be an ideal response?