#Question id: 18770
#Unit 13. Methods in Biology
#Question id: 12756
#Unit 10. Ecological Principles
Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.
The most likely cause for the shift in caterpillar peak mass is
#Question id: 3968
#Unit 3. Fundamental Processes
Which of the following statements is true?
#Question id: 5685
#Unit 5. Developmental Biology
Human sperm are allowed to fertilize ova having non- functional ovastacin. The following possibilities may be of significance in the fusion of these gametes:
A. The sperms will not fertilize ova.
B. The sperms will bind and penetrate the zona pellucida but will not be able to fuse with ovum membrane.
C. ZP2 will not be clipped by cortical granule protease.
D. CD9 protein of egg membrane microvilli will not be able to interact sperm membrane proteins in the absence of ovastacin.
E. Polyspermy may occur frequently.
Which combination of statements represent the outcome of the above event?
#Question id: 26788
#Unit 8. Inheritance Biology
Which of the following factors did not contribute to Mendel’s success in his study of heredity?
a.His use of the monoecious pea plant
b.His study of plant chromosome
c.His adoption of an experimental approach
d.His use of mathematics
e.The Plant use is easy to cultivate