Which among the following has 23 chromosomes?
Spermatogonia
Zygote
Secondary oocyte
Oogonia
$$ \text { Match the following and choose the correct options. } $$
| Column I |
Column II |
||
|---|---|---|---|
| A. | Trophoblast | 1. | Embedding of blastocyst in the endometrium |
| B. | Cleavage | 2. | Group of cells that would differentiate as embryo |
| C. | Inner cell mass | 3. | Outer layer of blastocyst attached to the endometrium |
| D. | Implantation | 4. | Mitotic division of zygote |
$$ \begin{array}{llll} \text { A } & \text { B } & \text { C } & \text { D } \\ 2 & 1 & 3 & 4 \\ \end{array} $$
A B C D
$$ \begin{array}{llll} \text { } 3 & 4 & 2 & 1 \end{array} $$
$$ \begin{array}{llll} \text { } 2 & 4 & 3 & 1 \end{array} $$
Which of the following hormones is not secreted by human placenta?
hCG
Estrogens
Progesterone
LH
The vas deferens receives duct from the seminal vesicle and opens into urethra as
epididymis
ejaculatory duct
efferent ductule
ureter
Urethral meatus refers to the
urinogenital duct
opening of vas deferens into urethra
external opening of the urinogenital duct
muscles surrounding the urinogenital duct