The pairing of homologous chromosomes occurs during which of the following?
a. mitosis
b. meiosis I
c. meiosis II
d. All of these are correct.
b. meiosis I
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The latitudinal diversity gradient refers to what pattern of species diversity?
A. For many kinds of organisms, species diversity is greatest near the equator and lowest near the poles. B. For many kinds of organisms, species diversity is greatest near the poles and lowest near the equator. C. For many kinds of organisms, species diversity is greatest at low elevation and lowest at high elevation. D. For many kinds of organisms, species diversity is greatest at high elevation and lowest at low elevation. E. Plants are most diverse near the equator while animals are most diverse toward the poles.
Prokaryotes are very important ecologically because of their involvement in all of the following except
A. photosynthesis. B. nitrogen fixation. C. STDs. D. denitrification. E. bioremediation.
The ____ in the bird's digestive tract is utilized for food storage
a. crop b. esophagus c. gizzard d. intestine e. mouth
The red blood cells of people with sickle cell anemia have abnormal shapes due to ____
a. hemoglobin molecules with mutant beta globin subunits sticking together and forming long fibers in the cytoplasm b. destruction of the hemoglobin molecules c. loss of hemoglobin through leaky cell membranes d. the attachment of phosphate groups to the hemoglobin molecules e. the binding of methyl groups to the heme group of the hemoglobin molecule causing desiccation of the cells