In humans, variations in skin color are due to differences in the amount, type, and distribution of the pigment ____________________

Fill in the blank(s) with correct word


melanin

Biology & Microbiology

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Most of the creamy flesh of a corn kernel is ____ tissue

a. pollen b. endosperm c. ovary d. carpel e. ovulec

Biology & Microbiology

Which of the following is NOT typically a main function of stems?

a. mechanical support b. storage of water, nutrients and sugars c. energy capture d. routes for vascular tissues e. new growth

Biology & Microbiology

Maturation of B cells occurs in the

A. lymph nodes. B. bone marrow. C. Peyer's patches. D. thymus. E. spleen.

Biology & Microbiology

Which of these is the end product of the complement system

a. cascade reaction b. convertase 5a c. complement factor 9 d. membrane attack complex

Biology & Microbiology