STD 11 - 16. Excretory product and their elimination — NEET STD 11 Science — Question

The blood leaving the lungs has all its haemoglobin oxygenated and gives up to the tissue because

Diphtheria is caused by

Which of the following two hormones have antagonistic effects

Which of the following statements are correct ?
(A) The lymphoid tissue located within the lining of major tracts in body is called mucosa associated lymphoid tissue (MALT) and constitute 40% of lymphoid tissue in human body.
(B) AIDS stands for Acquired Immuno Deficiency Syndrome and it was first reported in 1971 (year).
(C) AIDS is caused by HIV, a member of a group of viruses called retrovirus that has DNA genome.
(D) The incubation period for AIDS is 5 - 10 years.
(E) Once HIV gets inside body, virus enters macrophage where RNA genome replicates to form viral DNA with help of enzyme reverse transcriptase.
(F) Macrophage in our body act as HIV factory.
(G) HIV attacks killer T-lymphocyte.
(H) A widely used diagnostic test for AIDS is ELISA.
(I) NACO stands for National AIDS Control Organization.
(J) Normal cell shows a property of contact inhibition by virtue of which contact with other cells inhibit their uncontrolled growth.
(K) Malignant tumors normally remain confined to original location and causes little damage.
(L) Malignant tumors are mass of proliferating cells called neoplastic or tumor cells.
(M) The metastatis is property of benign tumors by which it reach different sites of the body.
Choose the correct option given below :-

Birds have bipedal locomotion as it

Assertion: A recessive character that was not expressed in heterozygous condition may be expressed again when it becomes homozygous.
Reason: The characters never blend in heterozygous condition.

Which one of the following is a matching pair of a body feature and the animal possessing it?

Mendel's principle of segregation was based on the separation of alleles in the garden pea during