Which type of immunoglobin is/are abundantly found in the foetus?
IgE
IgE
IgM
IgD
B.
IgE
IgG is the most abundant antibody in the foetus as it is the only one which can cross placental barrier from mother to reach the child and provides immune protection to it.
Hormones secreted by the placenta to maintain pregnancy are
hCG, hPL, progestogens, prolactin
hCG, hPL, estrogens, relaxin, oxytocin
hCG, progestogens, estrogens, glucocorticoids
hCG, hPL, progestogens, estrogens
Match the items given in Column I with those in Column II and select the correct option given below :
| column (i) | Column (ii) |
| (a) Proliferative Phase | (i) Breakdown of endometrial lining |
| (b) Secretory Phase | (ii) Follicular Phase |
| (c) Menstruation | (iii) Luteal Phase |
| a | b | c |
| iii | ii | i |
| a | b | c |
| i | iii | ii |
| a | b | c |
| iii | i | ii |
| a | b | c |
| ii | iii | i |
Gastrula is the embryonic stage in which
Cleavage occurs
blastocoel forms
Germinal layers form
Villi form
Withdrawal of which of the following hormones is the immediate cause of menstruation?
Eastrogens
FSH
FSH-RH
FSH-RH
The stage during which separation of the paired homologous chromosomes begins is
Pachytene
Diplotene
Zygotene
Diakinesis
Which of the following statements is correct?
Ovules are not enclosed by ovary wall in gymnosperms
Selaginella is heterosporous, while Salvinia is homosporous
Stems are usually unbranched in both Cycas and Cedrus
Horsetails are gymnosperms
The difference between spermiogenesis and spermiation is
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
