Discussion
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- Question
In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?
Options- A. 2:2
- B. 1:3
- C. 3:1
- D. 4:0
- Correct Answer
- 1:3
- 1. Through photosynthesis at least a half of the total carbon dioxide fixation on earth is carried out by?
Options- A. Pteridophytes
- B. Bryophytes
- C. Algae
- D. Gymnosperms Discuss
- 2. Which of the following vitamins contain nitrogen?
Options- A. Vitamin A
- B. Vitamin B
- C. Vitamin C
- D. Vitamin D Discuss
- 3. Lichen is an association between which of the two ?
Options- A. Algae and fungus
- B. Algae and tree
- C. Fungus and tree
- D. Bacteria and legume plant Discuss
- 4. The thymus gland produces a hormone called
Options- A. thyroxine
- B. thymosin
- C. thyronine
- D. calcitonin Discuss
- 5. Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in
Options- A. peas
- B. wheat
- C. corn
- D. oats Discuss
- 6. The body of all complex animals consist of only _______ basic types of tissue(s).
Options- A. 4000
- B. 400
- C. 40
- D. 4 Discuss
- 7. Which is the longest bone in human body?
Options- A. febula
- B. Tibia
- C. Stapes
- D. Femur Discuss
- 8. Carotene in fruits and vegetables gives it which color?
Options- A. Green
- B. Pink
- C. Orange
- D. Blue Discuss
- 9. Myopia is a defect of eyes which is also known as
Options- A. Far Sightedness
- B. Near Sightedness
- C. Astigmatism
- D. Night Blindness Discuss
- 10. Reflex actions are controlled by
Options- A. The Spinal Chord
- B. The Nerves
- C. The cells
- D. The Brain Discuss
Biology problems
Search Results
Correct Answer: Algae
Correct Answer: Vitamin B
Correct Answer: Algae and fungus
Correct Answer: thymosin
Correct Answer: peas
Correct Answer: 4
Correct Answer: Femur
Correct Answer: Orange
Correct Answer: Near Sightedness
Correct Answer: The Spinal Chord
Explanation:
A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.
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