#Question id: 28440
#Unit 5. Developmental Biology
A funnel-shaped depression at the center of Hensen’s node through which cells migrate to form the notochord and prechordal plate is called as___
#Question id: 11373
#Unit 9. Diversity of Life Forms
Which of the following obtain energy by oxidizing inorganic substances; energy that is used, in part, to fix CO2?
#Question id: 81
#Unit 1. Molecules and their Interaction Relevant to Biology
The Fischer projections of linear D-glucose and D-galactose are shown below. These two molecules are
#Question id: 2905
#Unit 2. Cellular Organization
With respect to X-chromosome inactivation, which, if any, of the following statements are not correct?
I. X-chromosome inactivation in mammals begins in the pre-implantation embryo
II. In humans all diploid cells that carry two normal X-chromosomes are subject to a random pattern of X-inactivation.
III. Once a decision has been made to inactivate an X chromosome (either the paternal or maternal X), all descendant cells show the same pattern of X-inactivation.
IV. The inactivated X chromosome becomes a highly condensed Barr body in which genes are silenced across the length of the chromosome.
#Question id: 12414
#Unit 10. Ecological Principles