What advantage do individuals with one sickle cell allele have?

a. no advantage
b. more rigid red blood cells
c. a stronger resistance to malaria
d. immunity to typhoid fever


Ans: c. a stronger resistance to malaria

Biology & Microbiology

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If a drug that inhibited transport from the trans face of the Golgi was applied to plant cells, which stage of the cell cycle would be directly affected?   

A.  G2 B.  S C.  Metaphase D.  Anaphase E.  Cytokinesis 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 know about the role of the Golgi in mitosis in plants? How does it relate to the question?   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?

Biology & Microbiology

Anti-A and anti-B antibodies

A. are considered natural antibodies. B. are present at birth. C. are typically IgM. D. easily cross the placenta. E. are considered natural antibodies AND are typically IgM.

Biology & Microbiology

Before they enter the blood stream, what

modification occurs to erythrocytes?

a. they are loaded with ant-bacterial compounds b. they lose their nucleus and other organelles c. they absorb oxygen and release carbon dioxide d. they are wrapped in a double plasma membrane e. they absorb nutrients and expel wastes

Biology & Microbiology

Species interactions between members of a

community include __________, which harms both species. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology