Hemoglobin is found in
(a) All invertebrates
(b) Only in vertebrates
(c) Earthworm and rabbit
(d) Cockroach and earthworm
Biology MCQs
In which of the following groups of animal the heart pumps only deoxygenated blood?
(a) Fishes
(b) Reptile
(c) Birds
(d) Amphibians
In a closed circulatory system, blood is completely enclosed within
(a) The skeleton
(b) Sinuses
(c) Vessels
(d) Hearts
Which one of the following blood vessels in mammals would normally carry the largest amount of urea?
(a) Dorsal aorta
(b) Hepatic portal vein
(c) Renal artery
(d) Hepatic artery
Which one of the following is responsible for guttation?
(a) Root pressure
(b) Transpiration
(c) Photosynthesis
(d) Osmosis
Watson and Crick composed the model of DNA structure in
(a) 1953
(b) 1943
(c) 1955
(d) 1963
Rh factor derives its name from
(a) Monkey
(b) Ape
(c) Rhino
(d) Human care
“Barr body” is derived from
(a) Autosomes in males
(b) Autosomes in females
(c) X-chromosome in female
(d) X-chromosome in males
Mutations used in agriculture are
(a) Lethal and recessive
(b) Artificially induced and recessive
(c) Lethal and dominant
(d) None of the above
Which of the following is a mutagen?
(a) SO2
(b) CO2
(c) CO
(d) HNO2