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 helper T cells The membrance of choice1B cells

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

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

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

	10)	Which of the following is the major cause of pollution
		plants man hydrocarbon gases 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
		Groundnut Wheat Sugarcane 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
		Polyxenous parasitism Monoxenous parasitism Parasitoids Hyperparasitism

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

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

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

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

21)

Neuroglial cells support and protect.

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

	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
		Nepenthes Australian Acacia Opuntias Utricularia

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

	26)	Sunflower belongs to the family
		Liliaceae Asteraceae Fabaceae Cruciferae

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