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 choice1B cells The membrance of

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

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

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

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

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

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

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

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

	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
		G2 - phase S - phase G1 - 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 Somatic hybridization Micropropagation

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

	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.
		Noradrenaline Acetylcholine Adrenaline GABA

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

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

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

	26)	Sunflower belongs to the family
		Cruciferae Asteraceae Liliaceae Fabaceae

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