All the populations of different organisms that live in the same place form a(n) ____
a. ecosystem
b. community
c. biosphere
d. organ
e. population
B
You might also like to view...
A water-vascular system is unique to the:
a. arthropods b. annelids c. chordates d. mollusks e. echinoderms
Evidence from Stanley Miller's experiments and evidence from carbonaceous chondrites collected from meteorites, taken together, most directly support the contention that
a. life can arise under conditions of extreme heat or cold. b. organic molecules can be synthesized by natural chemical processes. c. life did not arise on earth, but rather arrived from another planet by meteorite. d. living organisms are required to produce complex organic compounds. e. organic compounds require gravity for their formation.
Leader sequences contain signals that:a
prevent enzymes from degrading the newly synthesized mRNA. b. inhibit ribosome binding until the appropriate time. c. initiate chain termination. d. allow the ribosomes to be properly positioned to translate the message. e. allow tRNA molecules to successfully bind to mRNA.
Which of the following is incorrect concerning hemoglobin?
A. It is composed of 3 protein chain subunits. B. It never leaves red blood cells. C. It is made of amino acids. D. It can bind to nitric oxide. E. It is made inside red blood cells.