Spermatogonia undergo a series of cell divisions statements to produce sperms. Select the correct from the following :
A. Spermatogonia always undergo meiotic cell division.
B. Primary spermatocytes divide mitotically to produce secondary spermatocytes.
C. Secondary spermatocytes, through their second meiotic division, produce haploid spermatids.
D. Spermatids produce spermatozoa through mitosis.
E. Spermatids transform into spermatozoa by spermiogenesis.
Choose the correct answer from the options given below:
A and E only
C and E only
A, C and E only
B, C and D only
The JGA (Juxta Glomerular Apparatus) is a special sensitive region formed by cellular modifications in
$\_\_\_\_$ related to the same nephron.
Distal convoluted tubule and efferent renal arteriole
Proximal convoluted tubule and efferent renal arteriole
Proximal convoluted tubule and afferent renal arteriole
Distal convoluted tubule and afferent renal arteriole
Which one of the following is an appropriate example of sexual deceit?
Female wasp and fig
Ophrys and bumblebee
Sea anemone and clown fish
Cuckoo and crow
Choose the correct statements regarding frog's anatomy:
A. Hepatic portal system is the special venous connection between liver and intestine.
B. There are twelve pairs of cranial nerves arising from the brain.
C. The ureters and oviducts open separately into the cloaca in female frogs.
D. Hind-brain consists of cerebellum, medulla oblongata and optic lobes.
E. Sinus venosus joins the right atrium of heart.
Choose the correct answer from the options given below:
A, B and C only
B and D only
B and C only
A, C and E only
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