Zoology - Online Test
Q1. 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.
Q2. 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.
Q3. 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.
Q4. 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.
Q5. 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.
Q6. 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.
Q7. 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.
Q8.
In elephant and walrus, projecting tusks are :
Answer : Option B
Explaination / Solution:
The projecting tusk of elephant and walrus are incisors and canines respectively. These teeth are not used for chewing food.
Q9. The drug which binds to specific opioid receptors present in our central nervous system and gastrointestinal tract is
Answer : Option D
Explaination / Solution:
Opioids are substances that act on opioid receptors to produce morphine-like effects.
The endogenous opioids are dynorphins, enkephalins, endorphins, endomorphins and nociceptin. The opioid receptors are ~40% identical to somatostatin receptors (SSTRs). Opioid receptors are distributed widely in the brain, and are also found in the spinal cord and digestive tract.
Opioids are most often used medically to relieve pain, and by people addicted to opioids.
Q10. Part of brain that acts as relay centre to receive and transmit general sensations except smell :
Answer : Option C
Explaination / Solution:
Thalamus is the part of brain that acts as relay centre to receiveand transmit general sensations except smell. Thalamus is located in the forebrain superior to the midbrain.
