Wastes will accumulate and most nutrients would stop cycling if the ____ in the ecosystem dies
a. algae
b. bacteria and fungi
c. parasitic consumers
d. insects
e. vertebrates
b
Biology & Microbiology
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Which of the following is an example of a connective tissue?
A) the surface of the skin B) nerves C) blood D) cuboidal epithelium E) smooth muscles
Biology & Microbiology
The first living organisms appeared on Earth approximately
(a) 4.6 billion years ago. (b) 3.8 billion years ago. (c) 1 billion years ago. (d) 6400 years ago.
Biology & Microbiology
Which one of the following is not a steroid that uses a type I receptor?
A. estrogen B. glucocorticoids C. thyroid hormone D. androgens
Biology & Microbiology
In what phase of clinical trials are animals used?
A) Preclinical testing B) Phase I C) Phase II D) Phase III E) Post launch
Biology & Microbiology