What is the innermost layer of the heart?

A) epicardium
B) pericardium
C) cardium
D) endocardium
E) myocardium


Answer: D

Biology & Microbiology

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In __________ speciation, a geographic barrier interrupts gene flow between populations. Fill in the blank(s) with the appropriate word(s)

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Mechanisms that prevent interbreeding between two different species whose ranges overlap are

referred to as: a. sympatric isolating mechanisms. b. equilibrium isolating mechanisms. c. reproductive isolating mechanisms. d. allopatric isolating mechanisms. e. preadaptive isolating mechanisms

Biology & Microbiology

Which tissue can not divide to give rise to identical progeny in a plant that reproduces asexually?

A. root B. pollen grain C. stem D. leaf E. ovule

Biology & Microbiology

What types of nonlethal conditional mutations affecting bacterial cell division have been recovered?

What will be an ideal response?

Biology & Microbiology