Cells that have two copies of each type of chromosome are ________.
a) duplicated
b) haploid
c) abnormal
d) diploid
Ans: d) diploid
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The insertion of a skeletal muscle is
(a) attached to the less mobile portion of the skeleton. (b) attached to the portion of the skeleton that moves when the muscle contracts. (c) never attached to the skeleton. (d) its belly.
Genetically modified crops have been banned in the United States
Indicate whether the statement is true or false.
For the average person in the U.S., the largest source of radiation exposure is
A. background radiation. B. medical X-rays. C. irradiated food. D. consumer products. E. remote-controlled devices.
If the population of the last common ancestor of humans, chimpanzees, and gorillas was very large, and humans split from chimpanzees very quickly after the gorilla lineage diverged,
how might this influence the relationship between gene trees and species trees in this clade? What will be an ideal response?