#Question id: 5678
#Unit 5. Developmental Biology
Following process and their mechanism during fertilization in mammals.
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a. Rheotaxis |
i.A sensing mechanism in which, the oocyte and its accompanying cumulus cells secrete molecules that attract capacitated sperm toward the egg during the last stages of sperm migration |
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b. Chemotaxis |
ii.It is a transient event, and sperm are given a relatively brief window of competence during which they can successfully fertilize the egg. |
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c. Capacitation |
iii.it is the ability to sense temperature difference and preferentially swim from cooler to warmer sites is found only in capacitated sperm. |
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d. Thermotaxis |
iv.Sperm receive long-distance directional cues from the flow of liquid from the oviduct to the uterus and they will migrate against the direction of the flow—using CatSper calcium channels to sense calcium influx and monitor the direction of the current |
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Which of the following option is correct?
#Question id: 27966
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 21810
#Unit 12. Applied Biology
#Question id: 3499
#Unit 11. Evolution and Behavior
In some jacana species, males take care of the eggs and young, and females compete among themselves for territories that contain one to several males. Female jacanas are significantly larger than males. Which of these statements would you predict to be true of this bird species?
a. Male jacana fitness is primarily limited by ability to take care of eggs and raise young.
b. Female jacana fitness is limited by the number of males in her territory with which a female mates.
c. Variation in reproductive success should be greater in male jacanas than in females.
d. Variation in reproductive success should be greater in female jacanas than in males.
e. Males and females have equal variation in reproductive success.
#Question id: 11310
#Unit 1. Molecules and their Interaction Relevant to Biology
The D-glucose and D-mannose are epimers with respect to Carbon number