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Questions in biology

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

[Terjawab] 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

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

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

[Terjawab] 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

[Terjawab] 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

[Terjawab] 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

[Terjawab] 9. Tarun was having difficulty watching things in dim light. The doctor tested his eyesight, and he prescribed a particular vitamin supplement. He advised him to include a few food items in his diet regularly. Which component of food is he lacking in his diet? a) vitamin A b) vitamin C c) vitamin B d) vitamin D 10. Name the vitamin present in orange and lemon. a) vitamin A b) vitamin C c) vitamin B d) vitamin D

[Terjawab] In the dihybrid cross, what fraction of the parents had black fur and black eyes? What about the offspring?

[Terjawab] A diseased cell is no longer able to produce proteins. Which cell structure is most likely malfunctioning? A. cell membrane B. cytoplasm C. ribosome D. mitochondrion