#Question id: 5673
#Unit 5. Developmental Biology
Species-specific sperm attraction has been documented in numerous species. In echinoderms, sperm are attracted toward eggs of their species by chemotaxis. Following statements are about chemoattraction-
A. In this process Sperm follows a gradient of a chemical secreted by the egg.
B. These oocytes control only the type of sperm they attract, but not the time at which they attract them.
C. Releasing the chemotactic factor only when the sea urchin egg has completed all of its meiotic divisions .
D. Releasing the chemotactic factor only when the sea urchin egg is in second metaphase of its meiotic division.
E. The mechanisms of chemotaxis differ among species and chemotactic molecules are different even in closely related species.
Which of the following statement are incorrect about this process?
#Question id: 10553
#Unit 6. System Physiology – Plant
Cell walls allow plant cells to build up large internal hydrostatic pressures called
#Question id: 26892
#Unit 10. Ecological Principles
#Question id: 19201
#Unit 12. Applied Biology
#Question id: 5826
#Unit 8. Inheritance Biology
____ is a disease that causes progressive neurological degeneration that progresses to mental retardation and general loss of body function.