31. Which of the following nonpathogenic products is used in various crops as well as horticulture and ornamental plants?
[A] Azotobacter
[B] Fungi
[C] Tricho-Card
[D] None of these
Show Answer
Correct Answer: C [Tricho-Card]
Notes:
Tricho-Card is a nonpathogenic product that is used in various crops as well as horticulture and ornamental plants.
32. Consider the following statements about how plants absorb nitrogen:
- Plants absorb nitrogen in the form of inorganic nitrates or nitrites.
- Plants take in nitrogen in the form of organic compounds.
- Nitrogen is directly taken up by the plants from the atmosphere.
Which of the above statements is / are correct?
[A] Only 1 and 2
[B] Only 1 and 3
[C] Only 2 and 3
[D] All of these
Show Answer
Correct Answer: A [Only 1 and 2]
Notes:
Plants obtain nitrogen through their roots. In the soil, nitrifying bacteria change ammonia into nitrite (NO2 –) and then into nitrate (NO3 –), this process is known as nitrification. Furthermore, plants also absorb nitrogen in an organic form. Several organic compounds (compounds containing carbon) constitute the organic fraction of nitrogen in the soil. The organic matter in the soil exists as decomposing plant and animal residues, relatively stable decomposition-resistant compounds, and humus. The abundance of various forms of nitrogen can be altered by plant roots through the change in pH and secretion of organic compounds or oxygen.
33. Which one of the following is the ideal food for newborn babies?
[A] Milk
[B] Water
[C] Honey
[D] Sugar
Show Answer
Correct Answer: A [Milk]
Notes:
The best food for the newborn baby is mother’s milk initial secretion call colostrum. Breast milk is free from contamination and adulteration and supplies necessary immunoglobulins and nutrients in almost correct amounts. It protects against allergies, sickness, and obesity. It protects against diseases, like diabetes and cancer. It protects against infections, like ear infections. It is easily digested – no constipation, diarrhea or upset stomach.
34. In which one of the following is swim bladder absent?
[A] Cartilaginous fish
[B] Silverfish
[C] Cuttlefish
[D] Bony fish
Show Answer
Correct Answer: A [Cartilaginous fish]
Notes:
The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. The cartilaginous fish (e.g. sharks and rays) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.
35. Flower colours of red, pink, blue and purple come mainly from pigments called ____:
[A] Anthocyanins
[B] Lycopene
[C] Chlorophyll
[D] Carotenoids
Show Answer
Correct Answer: A [Anthocyanins]
Notes:
Anthocyanins responsible for the colours, red, purple, and blue, are in fruits and vegetables. Berries, currants, grapes, and some tropical fruits have high anthocyanins content. Red to purplish blue-coloured leafy vegetables, grains, roots, and tubers are the edible vegetables that contain a high level of anthocyanins.
36. Which of the following is an endemic species?
[A] Horn bill
[B] Nicobar pigeon
[C] Indian Rhino
[D] Pink head duck
Show Answer
Correct Answer: A [Horn bill]
Notes:
The Malabar Grey Hornbill is a hornbill that is endemic to the Western Ghats and associated hills of southern India. They are found mainly in dense forest and around rubber or coffee plantations.
37. A species restricted to a given area is ____:
[A] Endemic species
[B] Endangered species
[C] Vulnerable species
[D] Extinct species
Show Answer
Correct Answer: A [Endemic species]
Notes:
Endemic plants and animals are those that are unique to a specific geographic region. This makes them incredibly special and more vulnerable to extinction. Because they are only found in certain locations, they require special conservation efforts. Koalas, kangaroos, and emperor penguins are all endemic to Hawaii, Australia, and Antarctica.
38. Which of the following causes swine flu?
[A] Fungi
[B] Virus
[C] Bacteria
[D] Tapeworm
Show Answer
Correct Answer: B [Virus]
Notes:
Swine influenza, also called pig influenza, swine flu, hog flu and pig flu, is an infection caused by any one of several types of swine influenza viruses. Swine flu, also known as the H1N1 virus, is a relatively new strain of an influenza virus that causes symptoms similar to the regular flu. It originated in pigs, but is now known to spread primarily from person to person.
39. Where is pituitary gland situated?
[A] Near stomach
[B] Near lungs
[C] Near kidney
[D] Near brain
Show Answer
Correct Answer: D [Near brain]
Notes:
The pituitary gland is a tiny organ, the size of a pea, found at the base of the brain. As the “master gland” of the body, it produces many hormones that travel throughout the body, directing certain processes or stimulating other glands to produce other hormones.
40. Which is the usual reproductive part of a plant?
[A] Flower
[B] Leaf
[C] Stem
[D] Root
Show Answer
Correct Answer: A [Flower]
Notes:
The sole purpose of the flower is to allow the plant to reproduce. Each part of the flower plays a role in the steps of reproduction. Some flower parts are sterile but still aid in the process of reproduction. There are male gametes and female gametes.