Which of the following descriptions or structures does NOT match the cell type?
a. Sperm cells have flagella.
b. Nerve cells have long, thin extensions.
c. Epithelial cells are rectangular.
d. White blood cells can change shape.
e. Smallest cell are egg cells.
E
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In pea plants, the allele for tall (T) is dominant to the allele for short (t). The genotype for a short pea plant is ________.
A) Tt B) tt C) Tt or tt D) TT or tt
What results would you expect if mitochondria are inherited uniparentally from the ? strain?
A) Some, but not all, yeast colonies found on the plate without chloramphenicol will also grow on the plate with chloramphenicol. B) All of the yeast colonies on the plate without chloramphenicol will also grow on the plate with chloramphenicol. C) Many yeast colonies will grow on the plate without chloramphenicol and no colonies will grow on the plate with chloramphenicol. D) No colonies will grow on either plate.
What is at the center of a heme molecule in a
hemoglobin?
a. a beta globin chain b. an alpha globin chain c. iron d. nitrogen e. another heme molecule
A type II survivorship curve, drawn by plotting the number of individuals in a given population alive at the beginning of each age interval, is characterized by
A. most individuals dying of old age. B. most individuals dying during their reproductive years. C. individuals dying at a constant rate throughout time. D. many individuals dying early in life.