Which form of speciation is thought to be most common?
A) allopatric speciation
B) ecological speciation
C) sympatric speciation
D) haploploid speciation
E) none of the above
Answer: A) allopatric speciation
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The term for mechanical injury to the seed coat that induces germination is:
a. imbibition. b. scarification. c. bolting. d. vernalization. e. thigmomorphogenesis.
Given these parts of the nephron:
1) collecting duct 2) distal convoluted tubule 3) loop of Henle 4) renal corpuscle Which of these sequences represents the correct order through which filtrate would move in the nephron during urine formation? A. 1,2,3,4 B. 1,3,2,4 C. 2,1,4,3 D. 3,4,2,1 E. 4,3,2,1
Marsupial animals complete development in
A. a placenta. B. water. C. an egg. D. a pouch.
Cancers originate from a single cell.
Answer the following statement true (T) or false (F)