Biology - Online Test
Q1. Blood enters glomerular capillaries through _____ arteriole and leaves through _____ arteriole:
Answer : Option A
Explaination / Solution:
The blood plasma is filtered through the capillaries of the glomerulus into the capsule. The Bowman's capsule empties the filtrate into the proximal tubule that is also part of the duct system of the nephron. A glomerulus receives its blood supply from an afferent arteriole of the renal circulation
Q2. Evolution is
Answer : Option C
Explaination / Solution:
Evolution is the gradual change of race due to variation is course of time. It is the history and development of race along with variations. Evolution is a continuous process and takes millions of years to evolve a new species.
Q3. The tissue present in all organs of plant is
Answer : Option D
Explaination / Solution:
Generally all the organs of plant are made up of parenchyma cells.
Q4. How many cells per hour does a single maize root apical meristem can give?
Answer : Option C
Explaination / Solution:
Growth is measured by a variety of parameters some of which are: increase in fresh weight, dry weight,length, area, volume and cell number.
one single maize root apical mersitem can give rise to more than17,500 new cells per hour, whereas cells in a watermelon may increase in size by upto 3,50,000 times.
In the former, growth is expressed as increase in cell number; the latter expresses growth as increase in size of the cell.
Q5. Taxon is a
Answer : Option B
Explaination / Solution:
Each category in taxonomic hierarchy represents a rank and is commonly termed as taxon. Hence, the correct option is Ranking.
Q6. Actin filaments are found in all eukaryotic cells but reportedly absent in :
Answer : Option C
Explaination / Solution:
Actin filament help in contraction and relaxation of muscles. Actin filament are found in all eukaryotic cells but it is absent in nematode sperms.
Q7. Father of green revolution is
Answer : Option A
Explaination / Solution:
M.S. Swaminathan is known as father of green revolution. Green revolution increased the food production about three times the previous one. Use of hybrid seeds, fertilizers and modern method of agriculture results this achievement.
Q8. RCH stands for
Answer : Option B
Explaination / Solution:
RCH stands for reproductive and child health care. Creating awareness among the people about different aspects of reproduction and available facility for child health care is the main aim of this programme.
Q9. Root hairs absorb water from soil with the help of
Answer : Option C
Explaination / Solution:
Root hairs absorb water from soil with the help of suction pressure created due to concentration difference of water and mineral ions present in soil.
Q10. The epithelium found in the lining of stomach and intestine is
Answer : Option B
Explaination / Solution:
The columnar epithelium is found in the lining of stomach and intestine and help in secretion and absorption. It also provides barrier against harmful micro organisms.
