The most stable gut species include
a. Fusobacteria.
b. Streptococcus.
c. Lactobacillus.
d. Bacteroides.
Answer: C
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Progressive chromosomal changes as cancer develops are related to the loss of the ability to repair ____________________ in cancer cells
Fill in the blank(s) with correct word
Which of these is an incorrect comparison between flagella and cilia?
A. Flagella are longer structures than cilia. B. Flagella have essentially the same internal structure of cytoskeleton proteins as cilia. C. Flagella are used for propulsion, while cilia are used to attach cells to other cells or surfaces. D. Flagella and cilia are both used for types of cellular movement. E. Flagella are found in all three domains of organisms, while cilia are found only in Eukarya.
Which does NOT occur in prophase I of meiosis?
a. cytokinesis b. formation of groups of four chromatids c. homologue pairing d. crossing over e. condensation of chromatin
According to the text, this is the earliest member of the genus Homo to appear in the fossil record.
A) founder effect
B) Homo Habilis
C) Latin binomial
D) Australopithecus Africanus
E) convergent evolution
F) Ardipithecus ramidus
G) Neanderthals
H) chimpanzees
I) Homo erectus
J) astragalus