5552. Cells intercommunicates with neighbouring cells by_________________?
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A. Nessels

B. Plasmalema

C. Trachieds

D. Plasmedesmata
5553. Gametophytic self incompatibility was first reported in___________________?
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A. Lena sativa

B. Scale cereals

C. Nicotine sandarac

D. Set aria sphacelata

5555. Ribosomes are the centers of_____________________?
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A. Starch synthesis

B. Anaerobic respiration

C. Protein synthesis

D. Fat synthesis

5556. Abnormal cell with random number of chromosomes is__________________?
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A. Heterckaryotic

B. Polyploidy

C. Haploid

D. Annapolis
5559. In the F2 generation, genotypic and phenotypic ratios are identical in cases of___________________?
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A. Incomplete dominance

B. None of the above

C. Mendelian dihybrids

D. Mendel lan monohybrids

5561. Out breeding leads to reproduction in____________________?
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A. Homozygosity

B. None of the above

C. Population mean

D. Heterozygosity

5562. The process of transfer and deletion of several gene is_____________________?
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A. Synapsis

B. Gene mutation

C. Chromosomal mutation

D. Monoploldy

5564. Who gave the model of DNA_________________?
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A. Dtanele

B. Koran

C. Tatum

D. Watson and Crick
5565. As a result of linkage and crossingover _____________________?
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A. Chromatids become chromosomes

B. Exchange of chromosomal material

C. Chromosomes become half in number

D. Nuclear division come to close

5566. In crop improvement programmed haploids are of great importance because they__________________?
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A. Grow better under adverse conditions

B. Require only about half the amount of chemical fertilizers compared to diploids

C. Give homozygous lines following diplodization

D. Are useful in studies on meiosis

5568. Who discovered ribosomes__________________?
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A. Altmann

B. Garner

C. Palade

D. Cowdry

5569. Amount of DNA is the diploid cells____________________?
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A. Constant for particular organism

B. Varies with the age

C. None of the above

D. Coustant for all organismes
5571. The ray florets of sunflower is usually?
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A. Staminate

B. Bisexual

C. Pistillate

D. Sterile

5572. Top cross was first suggested by__________________?
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A. East (1908)

B. Simmonds (1979)

C. Davenport (1908)

D. Davis (1927)
5576. In cotton, jassids have non preference for______________________?
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A. Smoothness leaves

B. Hairiness of leaves

C. Okra leaves

D. Fregobract

5577. capsicum is a rich source of___________________?
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A. Vitamin A

B. Vitamin C

C. None of the above

D. Vitamin D

5578. The term ideotype was coined by_____________________?
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A. Rasmesson (1987)

B. Finlay (1968)

C. Jennings (1958)

D. Donald (1968)
5579. The outer most part of plant cell is____________________?
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A. Epidermis

B. Nuclear membrane

C. Cellulose cell wall

D. Plasma membrane

5580. Linked gene may be separated by the process of_________________?
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A. History of development of larger biological units

B. Evolution may be described as

C. Inheritance of acquired characters

D. Discontinuous genetic variation

5583. Drought is measured in terms of________________?
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A. Yield performance

B. All the above

C. Photosynthesis

D. Root length of seedings

5584. The ratio of treatment variance to error variance is known as______________________?
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A. F-value

B. Correction factor

C. Critical difference

D. t-value

5587. Which statement is true___________________?
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A. Etiolation is not a reversible process

B. Etiolation is physiological while albinism is genitival

C. Etiolation and albinism are synonyms

D. Etiolation is genetically while albinism is physiological

5588. An auxotroph is_________________?
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A. A plan that is able to synthesize its own carbohydrates

B. non of these

C. An organism that depends on other organism for meting its nutrient requirements

D. A mutant organism which has lost its ability to synthesize one or more essential nutrients
5590. Theory of mutation was given by___________________?
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A. Mendel

B. De Vries

C. Watson

D. Tschermak

5591. Who discovered nucleic acid________________?
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A. Van Mohl

B. Schultz

C. Miescher

D. Benda

5595. A mutation is a change in_________________?
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A. Chromosome structure

B. RNA

C. DNA

D. Chromosome number
5596. Self-incompatibility is controlled by_________?
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A. Multiple alleles

B. Polygenes

C. Plasmogenes

D. Both B and C

5597. In line x tester cross mating is done between:
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A. Males & females

B. Among males

C. All of these

D. Among females

5598. In spermatogenesis, each spermatogonium increases in size to form a __________?
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A. Spermatid

B. Spermatozoa

C. Spermatocyte

D. Primary oocyte

5599. In spermatogenesis, each spermatogonium increases in size to form a __________?
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A. Spermatozoa

B. Spermatocyte

C. Primary oocyte

D. Spermatid

5600. Male sterility is absence of_________?
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A. Sterile anther

B. Sterile pollen

C. All of these

D. Functional pollen