11. Which among the options listed can be classified as a ‘living fossil’?
[A] Blue green algae
[B] Green algae
[C] Fungus
[D] Ginkgo
Show Answer
Correct Answer: D [Ginkgo]
Notes:
The term ‘living fossil’ represents the organisms that have survived major extinction events, with little evolutionary change for hundreds of millions of years. Ginkgo is one such example. Ginkgos are native to China and are virtually unchanged for over 200 million years. The water and pest resistant nature, coupled with an ability to cope with pollution, aids in their longevity. The plant is predominantly used for medicinal purposes, particularly in Traditional Chinese Medicine.
12. Which of the following arteries supplies blood to the heart?
[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.
13. Phototropism Theory is related to which of the following scientist?
[A] Jane Goodall
[B] Charles Darwin
[C] Francis Galton
[D] None of these
Show Answer
Correct Answer: B [Charles Darwin]
Notes:
Plant physiologists have investigated phototropism for over 100 years. The best known early research on phototropism was by Charles Darwin.
14. Which of the following is milk sugar?
[A] Glucose
[B] Maltose
[C] Fructose
[D] Lactose
Show Answer
Correct Answer: D [Lactose]
Notes:
Lactose is known as milk sugar, and it is found in the milk of many mammals including humans and cows. Lactose is a disaccharide consisting of one unit of galactose and one unit of glucose.
15. Which of the following is not a form of bacteria?
[A] Coccus
[B] Bacillus
[C] Vibrio
[D] Lobosa
Show Answer
Correct Answer: D [Lobosa]
Notes:
Lobosa is a taxonomic group of amoeba in the Amoebozoa genus.
16. Iodine is obtained from which of the following members?
[A] Green algae
[B] Brown algae
[C] Red algae
[D] Blue green algae
Show Answer
Correct Answer: B [Brown algae]
Notes:
Kelp such as Fucus and Laminaria are rich sources of iodine. They are members of the Phaeophyceae brown algae.
17. Sterile stamens are called which of the following?
[A] Epipetalous
[B] Monadelphous
[C] Staminode
[D]
Epiphyllous
Show Answer
Correct Answer: C [Staminode]
Notes:
A staminode often has rudimentary, sterile or abortive stamens that do not produce pollen.
18. Which tissue contains various glands, which secrete oils, resins, tannins, mucilage, etc. to the plant?
[A] Laticiferous
[B] Euphorbiaceae
[C] Glandular
[D] All of the above
Show Answer
Correct Answer: C [Glandular]
Notes:
Glandular tissue contains various glands, which secrete oils, resins, tannins, mucilage, etc. to the plant.
19. In the absence of which of the following will photosynthesis not occur in leaves?
[A] Chlorophyll
[B] Guard cells
[C] Space between cells
[D] Vacuole
Show Answer
Correct Answer: A [Chlorophyll]
Notes:
In the absence of chlorophyll, photosynthesis does not occur in leaves. The chlorophyll in leaves helps capture the energy of sunlight. Chlorophyll is a green pigment found in plants.
20. The process of formation of seeds without fertilization in flowering plants is known as __.
[A] Budding
[B] Apomixis
[C] Sporulation
[D] Somatic hybridization
Show Answer
Correct Answer: B [Apomixis]
Notes:
The process of formation of seeds without fertilization in flowering plants is known as Apomixis.
