Biology - Online Test
Q1.
Which organism is shown in figure below
Answer : Option B
Explaination / Solution:
The plants parts shown below is the leaf of Bryophyllum having small plantlets on its margin. The vegetative reproduction by leaves occurs in this species.
Q2. Xerosere that begins on sand is called:
Answer : Option C
Explaination / Solution:
A psammosere is a seral community, an ecological succession that began life on newly exposed coastal sand. Most common psammoseres are sand dune systems.
Q3. Read the following statements :
i. cartilaginous joint is often called symphysis and eg. joints between adjacent vertebrae.
ii. The joint between atlas and axis vertebrae in man is a cartilaginous joint.
i. cartilaginous joint is often called symphysis and eg. joints between adjacent vertebrae.
ii. The joint between atlas and axis vertebrae in man is a cartilaginous joint.
Answer : Option B
Explaination / Solution:
The joint between the adjacent vertebrae in the vertebral column is caritilaginous joint.
Q4. In 1997, an American company got patent rights on
Answer : Option B
Explaination / Solution:
In September 1997 Texas, USA company RiceTec was granted U.S. Patent No. 5,663,484 on "basmati rice lines and grains." The patent secures lines of basmati and basmati-like rice and ways of analyzing that rice. RiceTec, owned by Prince Hans-Adam of Liechtenstein, faced international outrage over allegations of biopiracy.
Q5. Contraceptive oral pills help in birth control by
Answer : Option C
Explaination / Solution:
Contraceptive pills contain hormone progestogens or estrogen or combination of both. These hormones prevent the ovulation and prevent the pregnancy.
Q6. Basophils help the body defense by
Answer : Option C
Explaination / Solution:
Basphils are responsible for inflammatory reactions during immune response, as well as in the formation of acute and chronic allergic diseases. They can perform phagocytosis (cell eating), produce histamine and serotonins that induce inflammation, and heparin that prevents blood clotting.
Q7. Cellular genes which are known to take part in producing cancer are termed as
Answer : Option C
Explaination / Solution:
Cellular genes which are known to take part in producing cancer are called cellular oncogenes. Cancer is caused due to uncontrolled division of cells to produce tumor on body.
Q8. Pinus seeds cannot germinate without
Answer : Option C
Explaination / Solution:
The fungus provides minerals and water to the roots, inturn the roots provide sugars and N-containing compounds to themycorrhizae. Some plants have an obligate association with themycorrhizae.
Q9. The fusion of two polar nuclei with one male gamete is called
Answer : Option D
Explaination / Solution:
The process of fusion of two polar nuclei with one male gamete is called as triple fusion. The resulting cell becomes primary endosperm cells that forms endosperm.
Q10. Population ecology makes link with
Answer : Option D
Explaination / Solution:
Population ecology is an important area of ecology because it links ecology to population genetics and evolution. At population level natural selection operates to evolve desired traits.
