In humans, the embryonic development of a fourchambered

heart and the limb buds is present during
which week?
a. third
b. fourth
c. fifth
d. sixth
e. seventh


Answer: b

Biology & Microbiology

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An ecosystem includes both the living organisms and abiotic materials that function together

Indicate whether the statement is true or false.

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The calyx is composed of

a. petals. b. sepals. c. stigmas. d. ovules. e. anthers

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When the amount of water in a soil exceeds what the pore space can hold, the soil is ________

Fill in the blank(s) with correct word

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