A typical human body cell with 23 pairs of chromosomes is called a __________.
A. sister cell
B. somatic cell
C. haploid cell
D. gamete
B. somatic cell
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Cellular crawling motion is accomplished by:
A. the polymerization of microfilaments along the leading edge in response to an activated cell surface receptor. B. the depolymerization of microfilaments along the leading edge in response to an activated cell surface receptor. C. the contraction of microfilaments along the leading edge in response to an activated cell surface receptor. D. the polymerization of microfilaments along the trailing edge in response to an activated cell surface receptor. E. All of these choices can contribute to rapid shifting of direction of crawling motion.
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 species has the greatest number of ancestral character states (pleisiomorpohies)?
A. 1
B. 2
C. 3
D. 4
E. 5
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?
What is the main difference between pathogenic bacteria, pathogenic viruses, and viroids
What will be an ideal response?
Because of the mechanism of sex determination, males of many species can be neither homozygous nor heterozygous. Such males are said to be ________
A) recessive B) complementary C) dominant D) hemizygous E) None of the answers listed are correct.