Biology - Online Test
Q1. Which is the possible region of respiration in bacteria
Answer : Option B
Explaination / Solution:
Bacteria belongs to kingdom Monera in which organism are unicellular and prokaryotic. Prokaryotic organisms lacks membrane bounded organelles like mitochondria where respiration occurs. In bacteria respiration occurs in mesosome.
Q2. Transport over longer distances proceeds through the vascular system
Answer : Option B
Explaination / Solution:
Translocation is a biological process that occurs in all plants and involves the movement of water and other soluble nutrients through the xylem and phloem from one part of the plant to another.
Q3. A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes
Answer : Option B
Explaination / Solution:
A typical angiospermic embryo sac contains 8 nuclei which includes 3 egg apparatus at micropylar end, 3 antipodal cells at chalazal ends and 2 polar nuclei at the centre of embryo sac.
Q4. If vital index is >100 then the population will
Answer : Option A
Explaination / Solution:
Vital index is the ratio of births to deaths within a population during given time. If vital index is greater than hundred then the population will decreasing showing negative growth.
Q5. Element required for germination of pollen grain is
Answer : Option B
Explaination / Solution:
Elements play important role in completing life cycles of plants. Element required for germination of pollen grain is Boron.
Q6. That part of alimentary canal which is responsible for absorption of water, simple sugars and alcohol :
Answer : Option A
Explaination / Solution:
Absorption in Different Parts of Digestive System:
- Mouth: Some drugs
- Stomach: Water, simple sugars, alcohol, etc.
- Small intestine: Final products of digestion; like glucose, fructose, fatty acids, glycerol, amino acids, etc
- Large intestine: Water, minerals and some
Q7. Marijuana, hashish, charas and ganga are group of drugs collectively called
Answer : Option C
Explaination / Solution:
A cannabinoid is one of a class of diverse chemical compounds that acts on cannabinoid receptors in cells that alter neurotransmitter release in the brain.
Marijuana, hashish, charas and ganga contain chemicals called cannabinoids. They are generally, taken as inhalation or oral ingestion to effects cardiovascular system of the body.
Q8. Read the following about neurohypophysis :
i. Neurohypophysis secretes neurohormones.
ii. Oxytocin and ADH are synthesized in neurohypophysis
Answer : Option B
Explaination / Solution:
Neurohyphysis secretes neurohormones, which is a posterior gland, itself is a neural projection from hypothalamus. Neurohypophyis secretes vasopressin and oxytocin hormone.
Q9. Which among the following belong to Sphenopsida?
Answer : Option A
Explaination / Solution:
Equisetum of Pteridophyta belong to class Sphenopsida.
Q10. How much percent of vacuoles occupy the volume of the cell in plant cells?
Answer : Option A
Explaination / Solution:
In a mature cell, the vacuole may occupy as much as 90 percent of the cell volume, such that the rest of the cell contents are flattened against the cell membrane.
