STD 12 - 7. human health and disease — NEET STD 11 Science — Question

Which of the following statement(s) is/are true for menstrual cycle ?
(i) It occurs in female of all mammals,
(ii) In human non-pregnant normal females, ovulation is repeated at an average interval of about 28/29 days.
(iii) In human beings, ovulation cycles ceases around 50 years of age, that is termed as menopause.
(iv) Lack of menstruation is always an indicator of pregnancy.
(v) Menstruation only occurs if the released ovum is fertilised.
(vi) Menarche may also be due to stress, poor health.

Which organ system is lacking in the animals that bear water vascular system?

Cholecystokinin and secretin are

Mostly pesticides are

After fast running, man has fast heart beat, slow pulse and shallow breathing, in such conditions he has

The function of vaccine is the production and storage of

Which of the following is not used as abiopesticide?

Which were dominant during mesozoic era