31. What is the name of the smallest muscle?
[A] Gutters Maximus
[B] Antagonists
[C] Stapedius
[D] None of the above
Show Answer
Correct Answer: C [Stapedius]
Notes:
The stapedius is the smallest skeletal muscle in the body, about 1 mm in length.
32. Which of the following immunity is present from our birth?
[A] Passive immunity
[B] Active immunity
[C] Innate Immunity
[D] Acquired immunity
Show Answer
Correct Answer: C [Innate Immunity]
Notes:
Innate immunity is the defense system you are born with. It protects against all antigens. Innate immunity involves barriers that prevent harmful substances from entering the body.
33. The male accessory glands generate fluid that nourishes the sperm called __
[A] semen
[B] seminal plasma
[C] spermatogonia
[D] testosterone
Show Answer
Correct Answer: B [seminal plasma]
Notes:
The male accessory glands generate fluid that nourishes the sperm called seminal plasma and is rich in fructose, calcium, and certain enzymes.
34. Which of the following can cause hepatitis?
[A] an improperly functioning immune system
[B] alcohol and medicines
[C] viruses
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
An improperly functioning immune system, alcohol, medicines, and viruses can cause hepatitis. This is a viral disease, that causes hepatic anorexia resulting in liver damage or jaundice.
35. Which of the following is not a connective tissue?
[A] Cardiac Muscle
[B] Areolar Tissue
[C] Compact Bone
[D] Adipose Tissue
Show Answer
Correct Answer: A [Cardiac Muscle]
Notes:
Connective tissue is a group of tissues in the body that maintain the form of the body and its organs and provide cohesion and internal support. Bone, ligaments, tendons, cartilage, and adipose (fat) tissue are examples of connective tissue. Cardiac muscle is an example of muscle tissue. It is so named because it is found in the heart.
36. Which one of the following is commonly known as Pond Silk?
[A] Yeast
[B] Rhizopus
[C] Ulothrix
[D] Spirogyra
Show Answer
Correct Answer: D [Spirogyra]
Notes:
Pond silk is the common name of Spirogyra (algae) because it is very slimy in shape. It is also known as pond silk, water silk, pond scum or mermaid’s trees because of its bright green silky appearance. Its filaments shine like silk due to the presence of mucilage and spiral shaped chloroplast.
37. Which of the following plant hormones are incorrectly paired?
[A] Cytokinins- senescence
[B] Abscisic acid- transpiration
[C] Auxins- apical dominance
[D] Gibberlins- bud and seed dormancy
Show Answer
Correct Answer: B [Abscisic acid- transpiration]
Notes:
Abscisic acid also called plant stress hormone is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.
38. The elements known as primary nutrients for plants are ____:
[A] Nitrogen, Phosphorus and Potassium
[B] Potassium, Boron and Nitrogen
[C] Nitrogen, Oxygen and Silicon
[D] Nitrogen, Phosphorus and Iron
Show Answer
Correct Answer: A [Nitrogen, Phosphorus and Potassium]
Notes:
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as ‘NPK’. Other important nutrients are Calcium, Magnesium and Sulphur.
39. Azolla increases soil fertility for ____:
[A] Wheat cultivation
[B] Rice cultivation
[C] Maize cultivation
[D] Barley cultivation
Show Answer
Correct Answer: B [Rice cultivation]
Notes:
The nitrogen-fixing capability of Azolla an aquatic pteridophyte has led to it being widely used as a biofertiliser for increasing the productivity of rice fields. When rice paddies are flooded in the spring, they can be inoculated with Azolla, which then quickly multiplies to cover the water, suppressing weeds. The rotting plant material releases nitrogen to the rice plants, increasing the rice yield equivalent to that produced by 30-60 kg N/ha.
40. The only bird that flies backward is ____:
[A] Koel (Cuckoo)
[B] Sparrow
[C] Siberian Crane
[D] Hummingbird
Show Answer
Correct Answer: D [Hummingbird]
Notes:
A humming bird the smallest of all known birds can rotate each of its wings in a circle, allowing them to be the only bird which can fly forwards, backwards, up, down, sideways or sit in sheer space. To hover, humming birds move their wings forward and backward in a repeated figure eight.
