Question # 1

Young tissues retaining the potential to divide.

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Meristem

Xylem

Phloem

Cork

The removal of apex release that lateral buds from the apical dominance. It is called

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Inhibitory effect

Compensatory effect

Apical dominance

Reproduction

Intercalary meristems are situated at.

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Root apex

Shoot apex

Base of internode

Top of internode

The mesodermal cells do not invaginate but migrate medially and caudally from both sides and create a midline thickening called.

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Hensen's node

Primitive streak

Hypoblast

epiblast

Which light enhance cell division and retards cell enlargment.

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Red

Green

Blue

Violet

During elongation the cell volume increase up to 150 fold due to uptake of

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Light

Oxygen

Water

Carbon dioxide

The functions of oxytocin islare to ___________

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Cause the uterus to contract

Induce labor

Stimulate the release of milk from the mother's mammary glands when her baby is nursing

All of the above

Secondary growth leads to an increase in the diameter if the.

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Leaf

Root

Stem

Stem and root

In which developmental stage, germ layers are formed.

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Cleavage

Blastula

Gastrula

Organogenesis

The pigment free area that appears at the time of fertilization is called.

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embryo

Gray crescent

Yolk

White cytoplasm

In incubating eggs artificially the incubators are usually regulated at temperature between

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20 - 22^oC

27 - 29^oC

30 - 32^oC

36 - 38^oC

The unspecialized cells present in flatworm and Planaria are.

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Neoblast

Osteoblast

Osteoclast

Chondrocyte

Study of aging is called

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Teratology

Gerontology

Cell biology

Paleontology

The Syndrome which is an example of trisomy of the sex chromosome is

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Turner's syndrome

Down's syndrome

Klinefelter's syndrome

Tay-Sach's syndrome

In ascidian fertilized egg, yellow cytoplasm gives rise to

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Larval epidermis

Muscle cells

Notochord

Gut

Primary tissue is added by the

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Lateral meristem

Underground meristem

Apical meristem

Vertical meristem

The discoidal cap of cells above the blastocoel is called.

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Ectoderm

Endoderm

Mesoderm

Blastoderm

In the chick the mesodermal cells migrate and caudally from both sides and create a mid line thickening called

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Primitive streak

Excretion

Ultra-streak

Blastoderm

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