31. In mammals, few vertebrae join to form?
[A] Humerus
[B] Femur
[C] Synsacrum
[D] Atlas
Show Answer
Correct Answer: C [Synsacrum]
Notes:
In mammals, few vertebrae join to form Synsacrum. The synsacrum is a skeletal structure of birds and other dinosaurs.
32. This is not a classification of mammals:
[A] Eutheria
[B] Anapsida
[C] Metatheria
[D] Prototheria
Show Answer
Correct Answer: B [Anapsida]
Notes:
Anapsida is not a classification of mammals. Anapsida belongs to the subclass of reptiles whereas Eutheria, Metatheria, and Prototheria belong to class mammalia.
33. How many types of joints are present in our body?
[A] 2
[B] 3
[C] 5
[D] 6
Show Answer
Correct Answer: B [3]
Notes:
The human body has three main types of joints.
1. synarthrosis
2. amphiarthrosis
3. diarthrosis
34. The branch of biology that studies the immune system in all organisms.
[A] Botany
[B] Microbiology
[C] Immunology
[D] Biotechnology
Show Answer
Correct Answer: C [Immunology]
Notes:
Immunology is a branch of biology that studies the immune system in all organisms.
35. Which of the following is best maintains intestinal health?
[A] Starches
[B] Vitamins
[C] Fiber
[D] Fat
Show Answer
Correct Answer: C [Fiber]
Notes:
Fiber maintains better intestinal health. Fiber is a type of carbohydrate that the body cannot digest.
36. Syphilis is a bacterial infection usually spread by __
[A] Sexual contact
[B] Wound infection
[C] Air-borne droplets
[D] None of these
Show Answer
Correct Answer: A [Sexual contact]
Notes:
Syphilis is a bacterial infection mostly spread by sexual contact. It is caused by Treponema pallidum bacteria.
37. A nitrogen-fixing bacterium that forms loose associations with the roots of crop plants is __.
[A] Azotobacter
[B] Bacillus polymyxa
[C] Clostridium
[D] Azospirillum
Show Answer
Correct Answer: D [Azospirillum]
Notes:
A nitrogen-fixing bacterium that forms loose associations with the roots of crop plants is Azospirillum.
38. What is the aerobic digestion of sewage used to produce?
[A] Biomass
[B] Biofuels
[C] Synthetic fuels
[D] Metal articles
Show Answer
Correct Answer: B [Biofuels]
Notes:
Aerobic digestion of sewage is used to produce biofuels. The fuel obtained from biomass is called biofuel.
39. Yeast and mushrooms are the examples of organisms of which kingdom?
[A] Fungi
[B] Protista
[C] Monera
[D] Plantae
Show Answer
Correct Answer: A [Fungi]
Notes:
Yeasts, moulds (molds), and mushrooms are examples of fungi. Mushrooms are another group of fungi, which are mainly Basidiomycetes and partially Ascomycetes, both of which share a same feature — having a macroscopic “Fruiting-body, a Mushroom”. Yeasts are eukaryotic, single-celled micro organisms classified as members of the fungus kingdom.
40. Substances which are used to bring down the temperature in high fever condition are called ____:
[A] Antiseptics
[B] Antibiotics
[C] Pyretics
[D] Antipyretics
Show Answer
Correct Answer: D [Antipyretics]
Notes:
Antipyretics are used to bring down the temperature in high fever condition after interaction with hypothalamus. Antipyretics cause the hypothalamus to override a prostaglandin-induced increase in temperature. The body then works to lower the temperature, which results in a reduction in fever.
