An embryo with meroblastic cleavage, extraembryonic membranes, and a primitive streak must be that of ________.

#Question id: 5234

#Unit 11. Evolution and Behavior

Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?

#Question id: 935

#Unit 1. Molecules and their Interaction Relevant to Biology

Microorganisms capable of fixing nitrogen into a form usable by animals obtain the energy for this process from ________.

#Question id: 11457

#Unit 7. System Physiology – Animal

Dizziness is a perceived sensation that can occur when ________.

#Question id: 911

#Unit 1. Molecules and their Interaction Relevant to Biology

The correct order for molecular chaperone–mediated protein folding is:

I – exchange of ATP for ADP on chaperone

II – chaperone undergoes conformational change, which affects protein folding

III – chaperone binds to exposed hydrophobic residues on unfolded protein

IV – folded protein is released

#Question id: 9153

#Unit 9. Diversity of Life Forms

Imagine some cosmic catastrophe jolts Earth so that its axis is perpendicular to the orbital plane between Earth and the sun. The most obvious effect of this change would be ________.