31. Name the muscle which works opposite to each other?
[A] Cardiac Muscles
[B] Skeletal Muscle
[C] Antagonists’s muscle
[D] Stapedius muscle
Show Answer
Correct Answer: C [Antagonists’s muscle]
Notes:
A muscle that contracts is called an agonist whereas a muscle that relaxes or lengthens is called an antagonist.
32. Which of the following is a function of the heart?
[A] makes blood cells
[B] to pump blood throughout the body
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: B [to pump blood throughout the body]
Notes:
The primary function of the human heart is to pump blood throughout the body.
33. Which of the following is located at the junction with the bladder composed of smooth involuntary muscle?
[A] Urethra
[B] Internal Urethral sphincters
[C] External Urethral Sphincters
[D] Bladder
Show Answer
Correct Answer: B [Internal Urethral sphincters]
Notes:
The internal urethral sphincter is a muscle that constricts the internal urethral orifice. It is made up of smooth muscle so it is involuntary.
34. A tube that allows urine to pass out of the body __
[A] penis
[B] urethra
[C] scrotum
[D] All of the above
Show Answer
Correct Answer: B [urethra]
Notes:
A tube that allows urine to pass out of the body’s urethra. It is a long tube that runs through the penis.
35. Which disease is not a reason for animal disease?
[A] Genetic diseases
[B] Deficiency diseases
[C] Environmental discomforts
[D] Hygiene and cleanliness
Show Answer
Correct Answer: D [Hygiene and cleanliness]
Notes:
The Animal disease is a condition of discomfort associated with disturbed or abnormal functioning of the animal body due to genetic diseases, faulty nutrition or deficiency diseases, unsuitable discomforts, and the onslaught of pathogens.
36. In incomplete dominance__.
[A] Phenotype of both alleles is expressed
[B] Phenotype of only one allele is expressed
[C] Phenotype of neither of the alleles are expressed
[D] Phenotype of both alleles is partially expressed
Show Answer
Correct Answer: D [Phenotype of both alleles is partially expressed]
Notes:
In incomplete dominance, the phenotype of both alleles is partially expressed.
37. Mycorrhiza is a symbiotic association between
[A] Bacteria and fungi
[B] Algae and fungi
[C] Fungi and roots of higher plants
[D] Blue green algae and roots of higher plants
Show Answer
Correct Answer: C [Fungi and roots of higher plants]
Notes:
Mycorrhiza is a symbiotic association between fungi and roots of higher plants. A non-disease-producing association in which the fungus invades the root to absorb nutrients is called Mycorrhiza.
38. Which of the following are applications of rDNA technology?
[A] Development of Transgenic Plants
[B] Production of Antibiotics
[C] Production of Hormone Insulin
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Applications of rDNA technology are:
1. Development of Transgenic Plants
2. Production of Antibiotics
3. Production of Hormone Insulin
4. Production of Vaccines
5. Production of Interferon
39. The ____ is the stem-like part of the leaf that joins the blade to the stem, is known as:
[A] Vein
[B] Petiole
[C] Stipules
[D] Midrib
Show Answer
Correct Answer: B [Petiole]
Notes:
The petiole is the stalk-like structure which connects the leaf blade to the stem. The petiole has tiny tubes, that connect the veins on the leaf blade to the stem. Few of these enable water transport to the leaf while the other carry food away from the leaf to other parts of the plant.
40. Uric acid is the chief nitrogenous wastes in ____:
[A] Frogs
[B] Birds
[C] Fishes
[D] Mankind
Show Answer
Correct Answer: B [Birds]
Notes:
Land snails, insects, birds, and some reptiles excrete uric acid as the major nitrogenous waste. The white, crystalline substance seen in a typical bird or lizard “poop” is actually urine: a little pool of uric acid crystals in a very small amount of water.
