Many times species are composed of networks of distinct populations called metapopulations. When do metapopulations occur?
A. When a population is large and uniformly distributed.
B. When a population in poor habitat continually sends out dispersers to bolster populations in better habitats.
C. When a population in a better habitat does not send out colonizers into less suitable habitats.
D. When suitable habitat is patchily distributed and separated by areas of unsuitable habitat.
D. When suitable habitat is patchily distributed and separated by areas of unsuitable habitat.
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If an experimenter interferes with the
mesoderm in an egg, which of the following systems would NOT be affected by the experimenter?
a. circulatory system b. muscular system c. reproductive system d. integumentary system e. excretory system
What enzyme converts angiotensinogen into angiotensin I?
A) mucin B) angiotensin converting enzyme (ACE) C) atrial natriuretic peptide D) renin E) carbonic anhydrase
The current hypothesis about fungal evolution suggests that Basidiomycota and Ascomycota are more closely related than Ascomycota and Glomeromycota.
Answer the following statement true (T) or false (F)
Joseph went to a copy center and used a copy machine to make a duplicate set of 46 pages. Joseph then stapled every copied sheet to its original. This is similar to how a cell replicates its chromosomes in mitosis. For what reason would a cell do something similar during mitosis?
a) to keep the cell from dividing too early b) to keep the cell from making too many copies of a particular chromosome c) to allow the cell to move onward into Gap 1 phase d) to keep the copies and originals organized for later separation e) to introduce helpful mutations that make mitosis more successful