Crossing over normally takes place during which of the following processes?
A) meiosis II
B) meiosis I
C) mitosis
D) mitosis and meiosis II
Answer: B
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Almost all plasmids are double-stranded DNA
Indicate whether the statement is true or false.
When both participants in a species interaction develop adaptations in direct response to one another, in the long term this could progress into:
A. coevolution. B. competitive exclusion. C. extinction of one species. D. intraspecific competition. E. resource partitioning.
The coronary vessels
a. supply and drain the heart muscle. b. bypass the heart ventricles. c. send blood directly to the lungs. d. are not really necessary because the heart can get its blood supply from the "inside." e. lead directly from the atria to the ventricles.
One cell sends second messengers to another cell through gap junctions. What type of signaling would this be considered?
A. paracrine B. autocrine C. endocrine D. direct contact E. synaptic