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
		choice1B cells helper T cells cytoxic The membrance of

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

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

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

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

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

	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?
		Seed banks Field gene banks Shifting cultivation Botanical Gardens

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

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

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

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

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

21)

Neuroglial cells support and protect.

	22)	___is an abundant inhibitory neurotransmitter in CNS.
		Adrenaline Noradrenaline 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 Divergent evolution Migration Adaptive radiation

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

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

	26)	Sunflower belongs to the family
		Fabaceae Cruciferae Liliaceae Asteraceae

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