Which of the following statements are correct with reference to human endoskeleton?
A. Human skull is monocondylic.
B. The joint between any two adjoining vertebrae is a cartilaginous joint.
C. In human beings, the number of cervical vertebrae is seven.
D. All ribs except the last 2 pairs are bicephalic.
E. The occipital bone of skull is articulated with atlas vertebra.
Choose the correct answer from the options given below:
B and E only
B, C and E only
C, D and E only
A, B and D only
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
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