#Question id: 3627
#Unit 8. Inheritance Biology
A cross is made between two plants with white flowers. All the F1 progeny had red colored flower. This is because of
#Question id: 12066
#Unit 9. Diversity of Life Forms
#Question id: 793
#Unit 1. Molecules and their Interaction Relevant to Biology
What is the average size (in bp) of a mature t-RNA?
#Question id: 7167
#Unit 5. Developmental Biology
The following
experiment is designed to study the role of several hormones in the regulation
of metamorphosis in frogs.
|
Group # |
Treatment |
Days
to Metamorphosis |
|
1 |
Saline |
30 |
|
2 |
Prolactin |
> 100 |
|
3 |
TSH |
15 |
|
4 |
Thyroxine |
10 |
|
5 |
Corticosterone |
30 |
|
6 |
Thyroxine
+ Corticosterone |
5 |
|
7 |
Prolactin + TSH |
30 |
|
8 |
Thyroid gland
removed |
> 100 |
These results suggest which of the following about prolactin (group 2 and group 7) at the dose tested?
#Question id: 4999
#Unit 11. Evolution and Behavior
In the 5—7 million years that the hominid lineage has been diverging from its common ancestor with the great apes, dozens of hominid species have arisen, often with several species coexisting in time and space. As recently as 30,000 years ago, Homo sapiens coexisted with Homo neanderthalensis. Both species had large brains and advanced intellects. The fact that these traits were common to both species is most easily explained by which of the following?