The first heterotrophs obtained their energy from

a. autotrophs.
b. chemosynthetic organisms.
c. organic material in the ocean.
d. photosynthetic organisms.


B

Biology & Microbiology

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In which demographic transitional stage is

India?

a. birth and death rates equally high; growth rate low b. death rate dropping fast; birth rate declining but slowly c. birth rates declining and approaching the death rates d. birth rate falling below death rate; population size decreasing e. death rate greatly exceeds birth rate; population is close to extinction

Biology & Microbiology

A(n) ____________________ is a large-scale community of organisms in a major ecological setting. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

The term ________ is used to describe moving oxygen-rich air into the lungs and carbon dioxide-laden air away from the lungs

Fill in the blank(s) with correct word

Biology & Microbiology

A "summer cold" that lasts for weeks and is characterized by sore throat, mild fever, dry cough, and malaise may be (pneumococcal/staphylococcal/walking) pneumonia.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology