Alfalfa plants occur symbiotically with bacteria that can convert nitrogen gas to ammonium in a process called ________
A) nitrogen fixation
B) fertilizers
C) nitrification
D) nitroprocessing
A
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When does an infection become a disease?
What will be an ideal response?
Deletions are most useful for gene mapping
A) when you have a mutant allele of a gene that is recessive to normal alleles and amorphic. B) when you have a mutant allele of a gene that is dominant to wild-type alleles. C) if you have a mutant allele of a gene that results in no detectable mutant phenotype when homozygous. D) if you have a gain-of-function mutant allele of a gene.
This hormone causes the uterus to contract and the breasts to release milk.
A. androgens B. oxytocin C. estrogen D. follicle-stimulating hormone
A researcher hypothesizes that crocodile gender is determined by the incubation temperature of the egg. The hypothesis states that an average nest temperature of 32-33°C results in the birth of male crocodiles while cooler and higher incubation temperatures result in female crocodiles.What is the most likely explanation for how a group of crocodiles acquired the trait in which lower incubation temperatures give rise to male crocodiles?
A. Horizontal gene transfer from a related species has introduced changes in this group's proteome. B. One or more mutations in the proteome have been passed through the group by vertical descent. C. One or more mutations in the genome have been passed through the group by vertical descent. D. Horizontal gene transfer from a related species has introduced changes in this group's genome.