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Questions in biology

[Answered] Which of the following best defines gene flow? A. the sum of all genetic traits in a population's individuals at a given time B. any movement of genes from one population to another C. any movement of organisms from one environment to another D. the random change in the frequency of an allele in a population

[Answered] The oxidation of NADH2 releases 2 electrons and 2 protons. This energy is then utilized to synthesize: A) Two molecules of ATP. B) One molecule of ATP. C) Three molecules of ATP. D) No ATP.

[Answered] The origin of a muscle is the point of attachment that moves when the muscle contracts. A. True B. False

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] What are the three ways a neurotransmitter can influence a neuron? A. Ionisation, conduction, osmosis B. Excitatory, inhibitory or modulatory C. Chemically, Ionisation, modulatory D. Excitatory, conduction, modulatory

[Answered] Decreased levels of cellular carbon dioxide may result in hyperventilation. A. True B. False

[Answered] During heat shock treatment to the bacterium, the temperature used is: A. 5°C B. 100°C C. -196°C D. 42°C

[Answered] Which field will likely have soil with high nutrients for growth of new plants in the third season? A. Field 1 as cultivating same crops every season increases productivity of the crops B. Field 2 as cultivating different crops reduces the water requirement of crops C. Field 1 as cultivating the same crops requires only same type of nutrients D. Field 2 as cultivating different crops restore the nutrients in the field

[Answered] A seed geneticist discovers the endosperm has two maternal and one paternal genome. Which process led to this genetic ratio? Select an option: - Syngamy failure - Self-fertilization - Triple fusion during double fertilisation - Haploid fusion

[Answered] Tick (✔) the correct answer. 1. Which one is a sense organ? (a) Leg (b) Nose (c) Heart 2. We see different things with our- (a) Nose (b) Ears (c) Eyes 3. We smell the fragrance of flowers with our- (a) Nose (b) Eyes (c) Ears 4. Rose plant is a- (a) Shrub (b) Herb (c) Creeper 5. Grape plant is a- (a) Creeper (b) Herb (c) Climber 6. Cockroach is an- (a) Insect (b) Water animal (c) Bird 7. East, West, North and South are the- (a) Sides (b) Directions (c) Faces 8. How many colours does the rainbow have? (a) 7 (b) 5 (c) 8 9. Pepper plant is a- (a) Herb (b) Creeper (c) Climber