All major animal lineages were present in the seas by the end of the ________ period
a. Cambrian
b. Cretaceous
c. Quaternary
d. Carboniferous
a
Biology & Microbiology
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ATP hydrolysis directly powers the movement of _____
A) K+ out of cells B) Na+ out of cells C) Na+ into cells D) Ca++ into cells E) Cl- into cells
Biology & Microbiology
If the frequency of allele A is .7, using the Hardy-Weinberg formula, what would the frequency of the heterozygous Aa genotype be?
A. .09 B. .3 C. .42 D. .49 E. It cannot be calculated from the information provided.
Biology & Microbiology
Explain the transpiration-cohesion-tension mechanism that acts in the xylem of plants
What will be an ideal response?
Biology & Microbiology
Kwashiorkor is a condition that results from severe protein malnutrition
____________________ Indicate whether the statement is true or false.
Biology & Microbiology