Which of the following does NOT occur in the

first trimester during human development?
a. formation of a heart
b. disappearance of the tail
c. formation of internal organs
d. detection of movement of the fetus
e. segmentation and development of somites


D

Biology & Microbiology

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Squirrels tend to have larger body sizes at higher latitudes. This could be an example of

A) acclimation. B) positive assortative mating. C) a cline. D) the Hardy-Weinberg principle.

Biology & Microbiology

The outward expression of an organism's genotype is referred to as its genotype.

Answer the following statement true (T) or false (F)

Biology & Microbiology

In plant cells, what provides cellular support and protects cells from pathogens?

a. the cell wall b. the cell membrane c. the cytoplasm d. the plasmodesmata

Biology & Microbiology

How are comparisons of the number of base substitutions at nonsynonymous sites between genes encoding homologous proteins in different species or in different members of a gene family used to construct a molecular clock?

What will be an ideal response?

Biology & Microbiology