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 cytoxic choice1B cells The membrance of

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

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

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

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

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

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

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

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

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

	16)	DNA replication takes place during
		S - phase G1 - phase Prophase G2 - 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
		Biofortification Micropropagation Somatic hybridization Biomagnification

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

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

21)

Neuroglial cells support and protect.

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

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

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

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

	26)	Sunflower belongs to the family
		Liliaceae Asteraceae Fabaceae Cruciferae

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