1. During normal menstruation about 40 mL blood is lost
2. The menstrual fluid can easily clot
3. At menopause in the female, there is especially abrupt increase in gonadotropic hormones
4. The beginning of the cycle of menstruation is called menarche
The menstrual fluid can easily clot
1. C and D
2. B and C
3. C and A
4. A and B
C and D
1. Scales on their hind limbs
2. Four chambered heart
3. Two special chambers crop and gizzard in their digestive tract
4. Eggs with a calcareous shell
Eggs with a calcareous shell
1. adaptive radiation
2. seasonal migration
3. brood parasitism
4. connecting links
adaptive radiation
1. There is a decline in population as boys marry girls only from their own tribe
2. Hereditary diseases like colour blindness do not spread in the isolated population
3. Wrestlers who develop strong body muscles in their life time pass this character on to their progeny
4. There is no change in population size as they have a large gene pool
Hereditary diseases like colour blindness do not spread in the isolated population
1. Klinefelter's syndrome — 44 autosomes + XXY
2. Colourblindness — Y-linked
3. Erythroblastosis foetalis — X-linked
4. Down syndrome — 44 autosomes + XO
Klinefelter's syndrome — 44 autosomes + XXY
1. Thorn of Bougainvillea and tendrils of Cucurbita — Analogous organs
2. Nictitating membrane and blind spot in human eye — Vestigial organs
3. Nephridia of earthworm and Malpighian tubules of cockroach — Excretory organs
4. Wings of honey bee and wings of crow — Homologous organs
Nephridia of earthworm and Malpighian tubules of cockroach — Excretory organs
1. They were able to reproduce
2. They could separate combinations of molecules from the surroundings
3. They were partially isolated from the surroundings
4. They could maintain an internal environment
They could maintain an internal environment
1. is secreted by anterior pituitary
2. stimulates growth of mammary glands
3. stimulates pituitary to secrete vasopressin
4. causes strong uterine contractions during parturition
causes strong uterine contractions during parturition
1. A-3, B-1, C-4, D-2
2. A-4, B-1, C-2, D-3
3. A-3, B-4, C-1, D-2
4. A-2, B-3, C-1, D-4
A-3, B-1, C-4, D-2