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

Which one of the following is not a true amphibian animal

Which of the following activity is more difficult during bronchial asthma?

Synovial joints is

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The nematode can not survive in a transgenic host which expresses specific interfering RNA.
Reason (R) : Nematode specific gene introduced in the host produces both sense and antisense complementary RNA which initiate RNA interference in the host cell.
In the light of the above statement, choose the most appropriate answer form the option given below:

Which of the following statements are not correct for transport of oxygen ?
(i) About 97 per cent of O₂ is transported by RBCs in the blood.
(ii) Each haemoglobin molecule can carry a maximum of four molecules of O₂.
(iii) Binding of oxygen with haemoglobin is primarily related to partial pressure of O₂
(iv) Partial pressure of CO₂ hydrogen ion concentration and temperature are the other factors which can interfere with this binding.
(v) A sigmoid curve is obtained when percentage saturation of haemoglobin with O₂ is plotted against the pO₂
(vi) Every 100 ml of oxygenated blood can deliver around 5 ml of O₂ to the tissues under normal physiological conditions.

Which of the following component of blood does not enter into the nephron?

The heart of a crocodile consists of

The special contractile protein actin is found in