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
		helper T cells The membrance of cytoxic choice1B cells

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

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

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

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

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

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

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

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

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

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

	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
		Somatic hybridization Micropropagation Biomagnification Biofortification

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

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

21)

Neuroglial cells support and protect.

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

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

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

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

	26)	Sunflower belongs to the family
		Fabaceae Cruciferae Asteraceae Liliaceae

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