Which of the following is involved in the prevention of polyspermy?
A. acrosome of the sperm
B. fusion of the sperm and egg nucleus
C. depolarization of the egg's plasma membrane
D. changes within the corona radiata
E. the number of chromosomes contained within the sperm
Answer: C
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Polyphasic taxonomy uses methods that include
A) phenotypic methods. B) genotypic methods. C) phylogenetic methods. D) phenotypic, genotypic, and phylogenetic methods.
The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which trait is least informative of phylogenetic relationships within the group?
A. A
B. B
C. C
D. D
E. E
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about cladistics?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which enzyme is matched correctly with the substance it digests?
a. pancreatic amylase: fats b. pepsin: proteins c. salivary amylase: fats d. trypsin: fats
In the northern hemisphere, the tradewinds blow towards which direction? (note: not the direction they originate from)
What will be an ideal response?