31. What are the shape of the malleus and aural bone marrow?
[A] Oval shaped
[B] Hammer shaped
[C] Horseshoe-shaped
[D] None of the above
Show Answer
Correct Answer: B [Hammer shaped]
Notes:
Hammer-shaped is the shape of the malleus and aural bone marrow. In the middle ear between the incus and the eardrum, malleus are found.
32. The curved turbinates, present on the sides of the nose is called __
[A] Sinuses
[B] Septum
[C] Cartilage
[D] Turbinates
Show Answer
Correct Answer: D [Turbinates]
Notes:
Turbinates are curved turbinates on each side of the nose, and the bony ridges are lined with mucous membranes.
33. Gastroesophageal reflux disease is related to which of the following?
[A] circulatory system
[B] digestive system
[C] respiratory system
[D] excretory system
Show Answer
Correct Answer: B [digestive system]
Notes:
Gastroesophageal reflux disease is related to the digestive system. Gastroesophageal reflux disease (GERD) occurs when stomach acid repeatedly backs up into the tube connecting your mouth and stomach (esophagus).
34. Which disease is caused by Yersinia pestis?
[A] Pertussis
[B] Plague
[C] Leprosy
[D] Diptheria
Show Answer
Correct Answer: B [Plague]
Notes:
Plague disease is caused by Yersinia pestis bacterium which is spread mostly by fleas on rodents and other animals.
35. A trait produced by the effect of a gene or an allele is called__
[A] Oncogenic Trait
[B] Monogenic trait
[C] Polygenic trait
[D] None of these
Show Answer
Correct Answer: B [Monogenic trait]
Notes:
A trait produced by the effect of a gene or an allele is called a Monogenic trait.
36. Biofertilizers include which of the following?
[A] Nitrogen-fixing bacteria
[B] Nitrogen-fixing cyanobacteria
[C] Both bacteria and cyanobacteria
[D] Bacteria, cyanobacteria, and mycorrhizal fungi
Show Answer
Correct Answer: B [Nitrogen-fixing cyanobacteria]
Notes:
Biofertilizers include Nitrogen-fixing cyanobacteria. Cyanobacteria are oxygenated photosynthetic bacteria. It is found widely in marine, freshwater, and terrestrial environments, and is capable of fixing much atmospheric nitrogen.
37. In winter, at the time of hibernation, Toads maintain breathing through ____:
[A] Lungs
[B] Skin
[C] Both by Skin and Lungs
[D] Buccal cavity
Show Answer
Correct Answer: B [Skin]
Notes:
During hibernation in winter, toads or frogs spend the time tucked away deep in the soil, in the mud underwater or hidden amidst foliage or rotting plants. Outside of times of hibernation, they usually take in oxygen via the air, employing their lungs. However, during hibernation, they receive their necessary oxygen through their permeable skin. This is referred to as cutaneous gas exchange.
38. Jaws are absent in ____:
[A] Birds
[B] Fishes
[C] Reptiles
[D] Protochordata
Show Answer
Correct Answer: D [Protochordata]
Notes:
Jaws are absent in protochordata and cyclostomata (Agantho stoma). Protochordata refers to invertabrate subphylum of phylum chordata. It includes animals such as tunicates.
39. 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.
40. The scavengers of earth are ____:
[A] Fungi
[B] Bacteria
[C] Viruses
[D] Algae
Show Answer
Correct Answer: A [Fungi]
Notes:
A scavenger is an organism that mostly consumes decaying biomass, such as meat or rotting plant material. Fungi are called as scavengers of earth as they decompose waste.
