STD 12 - 1. sexual reproduction in flowering plants — BIOLOGY STD 12 Science — Question

The first clinical gene therapy was done for the treatment of:

Column-A of the table below lists various aspects of reproductive health and information related to them is also given in Column-B:

Column-I Methods	Column-II Working Methods
P. M.T.P.	i. Analysis of foetal cells in amniotic fluid
Q. Amniocentesis	ii. Legal acceptance in 1971
R. SAHELI	iii. Program launched in 1951
S. Family planning	iv. Nonsteroidal oral contraceptive

Keystone species are:

Which Artificial Reproductive Technique can help a lady conceive a child if both her fallopian tubes are blocked?

The period when menstrual cycle stops is:

Haemophilia is more commonly seen in human males than in human females because

Which one of the following is not the function of placenta?

In cambrian time, the dominant arthropods were:

Which one of the following regarding ecological pyramid is not correct?

If a person is suffering from severe male infertility due to very few sperms (oligozoospermia) or even no live sperms (azoospermia) in the ejaculate, it can be overcome by ________. This should offer couples an alternative to using donor sperm