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 The membrance of helper T cells choice1B cells

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

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

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

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

	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
		Sugarcane Wheat Groundnut Rice

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

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

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

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

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

	20)	Heparin is produced by
		Liver cells Spleen cells Plasma cells Blood 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
		Adaptive radiation Migration Divergent evolution Natural selection

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

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

	26)	Sunflower belongs to the family
		Cruciferae Fabaceae Liliaceae Asteraceae

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