AIIMS Biology Class 12 Questions

Which of the following are homosporous pteridophytes? I. Selaginella II. Lycopodium III. Salvinia IV. Equisetum

Which of the following statements is correct regarding menstrual cycle?

Identify the given structure.

The correct sequence of stages in the evolution of modern man (Homo sapiens), is

Match column I with column II and select the correct option from the given codes.

One of the following statements is incorrect with reference of biodiversity. Identify it.

Assertion: Endothecium layer of anther wall plays an important role in dehiscence of anther. Reason: The presence of fibrous bands and differential expansion of inner and outer tangential walls of endothecial cells cause dehiscence of anther.

Assertion: Foetal disorders can be diagnosed by chorionic villi sampling. Reason: Karyotyping can be done for mitotically dividing cells of chorionic villi.

Assertion: IgM is a type of immunoglobulin which cannot cross the placenta. Reason: IgM is pentamer immunoglobulin, joined by J⁻chain.