STD 11 - 4. Animal kingdom — NEET STD 11 Science — Question

Mendel crossed a pure white-flowered recessive pea plant with a dominant pure red-flowered plant. The first generation of hybrids from the cross should show

Correct pathway of milk from mammary gland

The genotypic ratio of a monohybrid cross will be

The brain capacity of Homoerectus was about

The type of epithelial cells which line the inner surface of fallopian tubes, bronchioles and small bronchi are known as

The functioning of the kidneys is efficiently monitored and regulated by hormonal feedback mechanisms involving the hypothalamus, JGA and to a certain extent, the heart. From given statements about JGA control, select correct option from below:
(i) It is controlled by Renin-Angiotensin mechanism.
(ii) A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin.
(iii) Renin converts angiotensinogen to angiotensin I.
(iv) Angiotensin II. being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.
(v) Angiotensin I activates the adrenal cortex to release aldosterone.
(vi) Aldosterone causes reabsorption of Na⁺ and water from the distal parts of the tubule. This also leads to an increase in blood pressure and GFR.

Menstrual flow occurs due to lack of

Absence of excretory organs, great power of regeneration and exclusively marine animals belong to the phylum