The inner lining of the uterus that is shed at menstruation if fertilization has not occurred is called the ____

a. cervix
b. endometrium
c. oogonium
d. chorion

e. epididymis


b

Biology & Microbiology

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Two separate photosystems involved in electron flow is a hallmark of

A) anoxygenic phototrophs. B) green sulfur bacteria. C) oxygenic phototrophs. D) purple bacteria.

Biology & Microbiology

Which method of transport is illustrated here?



a. potocytosis
b. pinocytosis
c. receptor-mediated endocytosis
d. phagocytosis

Biology & Microbiology

The human body's first exposure to an antigen generates a primary ________ response

Fill in the blank(s) with correct word

Biology & Microbiology

An element with more or fewer neutrons than the same element as it appears on the periodic table is known as which of the following?

A) isomer B) ion C) buffer D) isotope

Biology & Microbiology