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