Q.18. During which period did the first trilobites appear?
a) Cambrian
b) Devonian
c) S...
Biology, 11.02.2021 06:00 ramjand3062
Q.18. During which period did the first trilobites appear?
a) Cambrian
b) Devonian
c) Silurian
d) Ordovician
Answers: 2
Biology, 21.06.2019 20:00
Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.
Answers: 1
Biology, 21.06.2019 20:30
This is a type pf behavior that animals are born with and them to survive
Answers: 1
Biology, 22.06.2019 10:50
The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.
Answers: 1
Biology, 22.06.2019 11:30
Which of the following explains why a tree is often used as a model to represent the principle of common descent
Answers: 1
Chemistry, 01.12.2021 22:40
History, 01.12.2021 22:40
Chemistry, 01.12.2021 22:40
Mathematics, 01.12.2021 22:40
Mathematics, 01.12.2021 22:40
Mathematics, 01.12.2021 22:40
Mathematics, 01.12.2021 22:40