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
		The membrance of helper T cells choice1B cells cytoxic

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

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

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

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

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

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

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

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

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

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

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

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

21)

Neuroglial cells support and protect.

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

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

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

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

	26)	Sunflower belongs to the family
		Asteraceae Liliaceae Cruciferae Fabaceae

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