Two things capsules can do to help the microbe fight infection
What will be an ideal response?
1. prevent phagocytosis (slimy layer so cells cannot attach to bacteria cell)
2. attachment to tissue
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Occupying Europe and western Asia from about 150,000 to 28,000 years ago, ____ had a heavier build, more
pronounced brow ridges and slightly larger brains than modern humans, and were culturally and technologically sophisticated.
a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis
What role do prokaryotic pili play?
a. they help organize the cytoplasm b. they help stabilize DNA molecules c. they help prokaryotes cling to surfaces d. they help prokaryotes move across surfaces e. more than one of these is correct
In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color
The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a tall plant with white flowers produces 3/8 tall purple, 1/8 tall white, 3/8 dwarf purple, and 1/8 dwarf white. What is the genotype of the parents? What will be an ideal response?
Determinate cleavage takes place in ____ and is characterized by a pattern of development where the ultimate fate of
each cell is ____. a. deuterostomes; not fixed until late in the developmental process b. protostomes; not fixed until late in the developmental process c. deuterostomes; fixed early in the developmental process
d. protostomes; fixed early in the developmental process e. coelomates; fixed early in the developmental process