Biology Past Questions And Answers
Homologous pairs of chromosome separate during
- A. Cytolysis
- B. Cleavage
- C. Mitosis
- D. Meiosis
Which of the following neurotransmitters is the primary inhibitory neurotransmitter in the human central nervous system?
- A. GABA
- B. Acetylcholine
- C. Glutamate
- D. Serotonin
The organism at the organ level of organisation of life is
- A. Euglena
- B. Spirogyra
- C. Ginger
- D. Tapeworm
Which of the following blood vessels carries oxygenated blood into the heart?
- A. Pulmonary vein
- B. Anterior vena cava
- C. Pulmonary artery
- D. Aorta
The progressive loss of energy at each level in a food chain leads to
- A. an increase in biomas at each successive level
- B. a decrease in biomass at each successive level
- C. an increase in the number of organism at each successive level
- D. an increase in the total number of organisms at each successive level
The fruit formed from a single flower having several free carpel's is called L
- A) multiple fruit
- B) simple fruit
- C) aggregate fruit
- D) dehiscent fruit
The correct order in a food chain involving the organisms (1)Grasses, (2)Hawks, (3)Snakes, (4)Grasshopper, (5)Lizards is
- A. 1 2 3 4 5
- B. 5 4 3 2 1
- C. 1 4 5 3 2
- D. 3 2 4 5 1
Alternation of sexual and asexual method of reproduction is found in ________
- A) euglena
- B) ferns
- C) blue green algae
- D) grasses
Which of the following indicates that Euglena is plant?
- A. Conspicuous 'eye' spot
- B. Presence of gullet
- C. Limited movement
- D. Presence of starch grain
The structural similarities in Paramecium and Euglena are in the
- A. shape of locomotory organs
- B. blunt anterior and pointed posterior
- C. presence of micro and mega nuclei in both
- D. presence of anterior and posterior contractile vacuoles