Lungs first evolved in which group?
a. cartilaginous fishes
b. bony fishes
c. lampreys
d. coelacanths
e. lungfishes
b
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In meiosis, the number of chromosomes ______ while in mitosis, it ______.
(a) is halved/is doubled (b) is halved/remains the same (c) is doubled/is halved (d) remains the same/is halved
Anaphase of mitosis occurs when:
a) the chromatids begin to separate from the metaphase plate. b) the chromosomes line up on the 'equator'of the cell. c) the cell enters interphase. d) the chromatin coils into thicker, visible chromatids. e) the nuclear envelope first breaks down.
The developing fetus secretes chorionic gonadotropin only during the first 2 weeks of pregnancy
Indicate whether the statement is true or false
How does the fossil record corroborate phylogenetic history?
A. The timing of evolutionary events in the fossil record is not consistent with the branching order of a phylogenetic tree. B. Events in the fossil record occur randomly throughout a phylogenetic tree, so the two are not related to one another. C. Events that occur early in the fossil record are represented by branching events nearer to the root of a phylogenetic tree. D. Events that occur early in the fossil record are represented by branching events nearer to the tips of a phylogenetic tree. E. Fossil record events are too old to be represented on phylogenetic trees, which reconstruct the more recent past.