BIOLOGY M.C.Q (1 Marks)

(b) (A)
Explanation: Expiration is the release of carbon dioxide-rich air from the thoracic cavity. When the volume of air decreases and pressure increase the air from the chest moves out. This kind of pressure is called positive intrapulmonary pressure.

(d) Rohu
Explanation: An ammonotelic organism excretes nitrogenous waste as soluble ammonia. Most of the aquatic animals including protozoans, crustaceans, platyhelminths, cnidarians, poriferans, echinoderms, fishes, larvae/tadpoles of amphibians are ammonotelic. Rohu is a species of fish.

(c) Bryophytes
Explanation: Bryophytes are called amphibians of the plant kingdom as they can grow in both land and water. Water is essential for the completion of the life cycle as they release antherozoids into the water where they come in contact with archegonium to produce a zygote.

(b) Cytokinin
Explanation: Cytokinins help overcome apical dominance. They promote nutrient mobilization which helps in the delay of leaf senescence.

(d) RBCs and few proteins
Explanation: The lymph is different from the blood. It is known as tissue fluid. Lymph is yellowish in colour as it lacks RBCS and few proteins.

(d) 20.83%
Explanation: Filtration fraction is the ratio of glomerular filtration rate (GFR) to the renal plasma flow (RPF). GFR of a normal human is 120 ml/min. so,

(b) cytochromes
Explanation: Electrons become excited and jump into an orbit farther from the atomic nucleus. These electrons are picked up by an electron acceptor which passes them to an electrons transport of cytochrome.

(a) Inspired air = Alveolar air
Explanation: Respiration is a physiological process. Total lung capacity (TLC) includes vital capacity (VC) and residual volume. Cutaneous respiration is breathing via the skin.

(d) Intrafascicular cambium
Explanation: Intrafascicular Cambium is primary meristem. It develops from the procambium of the stem apex. It is located inside the open vascular bundles, between phloem and xylem patches.

(c) Heteropolymers
Explanation: Proteins are made of building blocks which are different. Proteins are heteropolymers made of amino acids.

(a) Pronephric
Explanation: The adult human kidney is metanephric, the third and final excretory organ that develops in a vertebrate embryo. First embryonic tubules formed in vertebrates during embryonic development are pronephric.

(b) Both Plants and Animals
Explanation: Since biology deals with both plants and animals, the international code of biological nomenclature is applied to both plants and animals. Hence, the correct option is Both plant and animals.