The extinction of the dinosaurs has been associated with
I Have a list of possible answers, but am not to sure which one it is.
Question:The extinction of the dinosaurs has been associated with
Possible Answers:
a) a layer of soot containing iridium.
b) a meteor impact at the end of the Cretaceous that caused major cooling.
c) a crater in the Caribbean and coast of the Yucatan.
d) All of the above.
The organic soup in which the first cell is believed to have arisen probably containe
Question:The organic soup in which the first cell is believed to have arisen probably contained.
Possible Answers:
a) algae and other microscopic organisms.
b) bubbling hot gases only.
c) amino and organic acids.
d) isolated atoms.
The earliest forms of life on earth are found in rocks
Question:The earliest forms of life on earth are found in rocks.
Possible Answers:
a) 4.6 billion years old.
b) 3.5 billion years old.
c) 1 billion years old.
d) 4 million years old.
e) 1 million years old.
Which of these gases was NOT in the primitive atmosphere?
Question:
Which of these gases was NOT in the primitive atmosphere?
Possible Answers:
a) water vapor
b) N 2
c) CO 2
d) oxygen
e) H 2
Africa, Asia, South America, and Antarctica share some patterns of primitive (fossil)
Question:
Africa, Asia, South America, and Antarctica share some patterns of primitive (fossil) plants and early reptiles, but do not have similar mammal populations. This therefore.
Possible Answers:
a) suggests that a pattern of land bridges existed at different times in geological history.
b) suggests that the earlier plants and reptiles evolved while continents were joined but mammals radiated into diverse groups after separation.
c) suggests that the mammals evolved earlier while continents were joined but plants and reptiles radiated into diverse groups after separation.
d) is an unsolved puzzle probably due to the random nature of biological evolution.
e) casts serious doubts upon the theory of continental drift and fused land masses.
In a liquid environment, molecules will automatically form droplets called lipos
Question:
In a liquid environment, ____ molecules will automatically form droplets called liposomes.
Possible Answers:
a) phospholipid
b) nucleic acid
c) glucose
d) amino acid
e) protein