Life Processes - I (Class X)

Renal artery gives rise to a bunch of capillaries called glomerulus.

Pneumatophores are called breathing roots.

One of the major functions of magnesium (Mg) and iron (Fe) is the synthesis of chlorophyll.

Mitral (or bicuspid) valve in mammals guards the opening between left atrium and left ventricle.

Trypsinogen is secreted by pancreas.

This is the correct answer. Diaphragm forms the floor of the chest cavity in humans.

Anaerobic respiration occurs in the cytoplasm of cells.

Only creatinine and uric acid are the organic substances present in urine.

Inferior vena cava brings blood from lower half of the body.
Superior vena cava brings blood from upper half of the body.
Both of these large veins join at the right atrium of the heart.
Thus, (2) is incorrect and (1) is correct.

In amoeba, nitrogenous waste like ammonia and excess water is removed by contractile vacuole.

During heavy exercise, when there is a lack of oxygen in our muscle cells, pyruvate is converted into lactic acid. 

This is the correct option. The left ventricle is a heart chamber responsible for pumping oxygenated blood to tissues all over the body. The right ventricle is a heart chamber responsible for pumping deoxygenated blood to the lungs. The left auricle is a heart chamber responsible for collecting oxygenated blood as it leaves the lungs. The right auricle is a heart chamber responsible for collecting deoxygenated blood from the bloodstream. 

Lacteals are the lymphatic vessels arising in the intestinal villi.