Question # 1

Immediately after fertilization, the egg undergoes a series

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Morulla

Gastrulation

Cleavage

Blastula

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

The discoidal cap of cells above the blastocoel is called.

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Ectoderm

Endoderm

Mesoderm

Blastoderm

Intercalary meristems are situated at.

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Root apex

Shoot apex

Base of internode

Top of internode

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

A plant has a growth pattern called

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Open growth

Closed growth

Round growth

Which one of the following condition is resulted from excess GH in adults?

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Cushing's disease

Acromegaly

Hyperthyroidism

Diabetes mellitus

A plant has a growth pattern called.

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Open growth

Meristem

Growing point

Apical

Branch of biology which deals with the study of abnormal development and their cause is called.

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Embryology

Teratology

Gerontology

Microcephaly

During elongation, the cell volume increase upto.

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50 fold

100 fold

150 fold

200 fold

The individuals who born with abnormal organs or body parts is called.

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Malformed

Malignant

Malfunction

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

In humans ,MSH(melanocyte-stimulating hormone) ___________

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Regulates primary skin color

Causes the thyroid to produce thyroxin

Governs the rate of tarming

Concentration is very low.

The unspecialized cells present in flatworm and Planaria are.

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Neoblast

Osteoblast

Osteoclast

Chondrocyte

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

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embryo

Gray crescent

Yolk

White cytoplasm

In the zone of elongation, the volume of the cells increase upto.

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100 times

150 times

200 times

250 times

Oxytocin is secreted by the endocrine gland named:

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Pituitary gland

Thyroid gland

Parathyroid gland

Adrenal gland

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