11. Which of the following arteries supplies blood to the heart? (UPSC Prelims 1997)
[A] Carotid arteries
[B] Hepatic arteries
[C] Coronary arteries
[D] Pulmonary arteries
Show Answer
Correct Answer: C [Coronary arteries]
Notes:
The aorta (the main blood supplier to the body) branches off into two main coronary blood vessels (also called arteries). These coronary arteries branch off into smaller arteries, which supply oxygen-rich blood to the entire heart muscle. The right coronary artery supplies blood to the right side of the heart.
12. Which among the following are female sex harmones?
[A] Estrogen
[B] Progesterone
[C] Testosterone
[D] Both a and b
Show Answer
Correct Answer: D [Both a and b]
Notes:
Estrogen and progesterone are the female sex harmones. Estrogen is responsible for the development of secondary sexual characteristics. Progesterone supports during pregnancy and controls the menstrual cycles in women.
13. In the branch of biology, what is the transmission of paternal traits to progeny called?
[A] Genetics
[B] Heredity
[C] Gerontology
[D] Genetic Engineering
Show Answer
Correct Answer: B [Heredity]
Notes:
The transmission of characteristics from parent to offspring is called heredity, and can be inferred from inherited characteristics.
14. The science of taxonomy is related to which of the following?
[A] Plant Classification
[B] Animal Classification
[C] Microorgranism
[D] None of these
Show Answer
Correct Answer: A [Plant Classification]
Notes:
The science of taxonomy is related to Plant Classification. Carl Linnaeus is the father of modern Taxonomy. Linnaeus, in his book System Naturae, has divided all living beings into two kingdoms – the plant kingdom and the animal kingdom.
15. Which of the following class of leucoplasts is responsible for fat storage?
[A] Amyloplast
[B] Proteinoplasts
[C] Aleuroplasts
[D] Elaioplasts
Show Answer
Correct Answer: D [Elaioplasts]
Notes:
Leucoplast is colorless or non-pigmented in nature. It is used for storage. Amyloplasts store starch, proteinoplasts and aleuroplasts as well as modify proteins.
16. In which part of the body cholesterol is synthesized?
[A] Pancreas
[B] Liver
[C] Spleen
[D] Stomach
Show Answer
Correct Answer: B [Liver]
Notes:
Cholesterol is a type of Lipid or the fat present in blood. The majority of the cholesterol consumed by the human body on a daily basis is synthesised by Liver.
17. What are autotrophic thallophytes called?
[A] Fungi
[B] Algae
[C] Bacteria
[D] Virus
Show Answer
Correct Answer: B [Algae]
Notes:
Thallophytes are commonly known as algae. Algae are chlorophyll-bearing, simple, thalloid, autotrophic and largely aquatic organisms. They are found in a wide variety of habitats such as moist rocks, soil and wood.
18. Fungi that get their food directly from dead organic matter are called?
[A] Predators
[B] Decomposers
[C] Mutualists
[D] Parasitic fungi
Show Answer
Correct Answer: B [Decomposers]
Notes:
Fungi that get their food directly from dead organic matter are called Decomposers.
19. What are the first plants that lived on land?
[A] Angiosperms
[B] Gymnosperms
[C] Bryophytes
[D] Pteridophytes
Show Answer
Correct Answer: C [Bryophytes]
Notes:
Bryophytes are the first plants that lived on land.
20. Dicotyledonous branches are found in which of the following?
[A] Fern
[B] Funaria
[C] Liverworts
[D] Marchantia
Show Answer
Correct Answer: C [Liverworts]
Notes:
Dicotyledonous branches are found in Liverworts. Liverworts are also moss-like land plants that do not have a vascular system.