Biology (Quiz 1) : Science : Class 12 - Sample Questions : Amrita Vidyalayam eLearning Network

Biology

	Quiz 1 Quiz 2
	Quiz 1 Quiz 2

1)

The two main events are gametogenesis and gamete transfer.

2)

The process of formation of megaspores from the megaspore mother cell is called

3)

The testes are situated outside the abdominal cavity within a pouch called

4)

The are paired folds of tissue under the labia majora.

5)

Intentional or voluntary termination of pregnancy before full term is called

	6)	The virus that cases acquired immune deficiency syndorme (AIDS) parasitizes
		cytoxic choice1B cells The membrance of helper T cells

	7)	Autoecology deals with
		Ecology of species Ecology of many species all the above Ecology of community

	8)	MAB stands for
		Man and biotic community Man and biosphere man antibiotics and bacteria Mayer Anderson and bisby

	9)	Red Data book provides data on
		Endangered plants and animals Lists of plants and animals Red flowered plants Red colored fishes

	10)	Which of the following is the major cause of pollution
		man hydrocarbon gases plants fungi

	11)	A clone is a group of individuals obtained through
		Hybridization Cross pollination Self pollination Vegetative propagation

	12)	Axillary buds are used to raise crop of
		Wheat Rice Sugarcane Groundnut

	13)	Which one of the following is not used for ex situ plant conservation?
		Field gene banks Seed banks Shifting cultivation Botanical Gardens

	14)	Question textA phenomenon when parasite parasitizes themselves is known as
		Monoxenous parasitism Hyperparasitism Polyxenous parasitism Parasitoids

	15)	A monocarpic plant is one which
		flowers and fruits only once in life time and thereafter dies has only one carpel produces only one seed none of these

	16)	DNA replication takes place during
		Prophase S - phase G2 - phase G1 - phase

	17)	In a plant organ, which is covered by periderm and the stomata are absent, some gaseous exchange still takes place through
		pneumatophores trichomes aerenchyma lenticels

	18)	The method of producing thousands of plants through tissue culture is called
		Biomagnification Somatic hybridization Biofortification Micropropagation

	19)	Hardening of the arteries due to deposition of cholesterol is called
		Thrombosis Atherosclerosis Stenosis Rhinitis

	20)	Heparin is produced by
		Plasma cells Blood cells Spleen cells Liver cells

21)

Neuroglial cells support and protect.

	22)	___is an abundant inhibitory neurotransmitter in CNS.
		Noradrenaline Acetylcholine Adrenaline GABA

	23)	Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as
		Adaptive radiation Natural selection Divergent evolution Migration

	24)	The leaves are modified into spines in
		Australian Acacia Opuntias Utricularia Nepenthes

	25)	The lateral roots originate from
		Endoderm cells Cortical cells below root hairs Epiblema Pericycle cells

	26)	Sunflower belongs to the family
		Liliaceae Asteraceae Fabaceae Cruciferae

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