If meiosis did NOT occur in sexually reproducing
organisms,
a. growth of the zygote would be halted.
b. mitosis would be sufficient.
c. gametes would be haploid.
d. the chromosome number would double in each
generation.
e. eggs would be haploid, but sperm would be
diploid.
Answer: d
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In response to larval insect grazing, some plants produce substances known as precocenes, which destroy the part of the insect brain that secretes juvenile hormone. What effect would exposure to precocenes have on insect development?
A. The larval insect would molt into an adult prematurely. B. The larval insect would not be able to produce ecdysone. C. The larval insect would molt into larger and larger larval stages. D. The larval insect would not be able to molt. E. The time interval between successive molts would increase.
PAHs (polycyclic aromatic hydrocarbons) found in tobacco smoke preferentially bind to regions within the ________ and trigger base substitutions.
A) GAL-4 gene B) p53 gene C) DMBA gene D) homeogenes E) viral gene
What am I? I am coenocytic, lack sexual reproduction, and reproduce asexually via blastospores
a. Zygomycetes b. Glomeromycetes c. Basidiomycetes d. Ascomycetes e. Chytridiomycetes
Which of the following is false about the E. coli Lac operon?
A. it is an example of negative control B. the presence of lactose acts as an inducer C. the repressor binds to the operator D. the mRNA for the receptor binds to the operator