In meiosis of oogenesis, how many mature eggs result?
A. 1
B. 2
C. 3
D. 4
A
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The chemical bonds in peptidoglycan can be hydrolyed by the enzyme ________, found in tears and saliva.
A. kinase B. lysozyme C. penicillinase D. peptidase
Which of the following are mechanisms to prevent polyspermy?
_____ altering composition of exterior egg coat _____ change in membrane potential of egg _____ cortical granule enzymes remove sperm receptors from egg _____ special proteins inside the egg compare the DNA of different sperm, choosing the most adapted one _____ toxic molecules exit the egg to attack extra sperm _____ vitelline envelopes lift off surface of egg
An artificial pacemaker supplements the actions of the
1.sympathetic nerves. 2.atrioventricular node. 3.medulla oblongata. 4.sinoatrial node. 5.heart muscle, itself.
In ruminants, cellulose digestion occurs in the
A. omasum. B. cecum. C. rumen and reticulum. D. reticulum. E. rumen.