Question # 1

The unspecialized cells present in flatworm and Planaria are.

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Neoblast

Osteoblast

Osteoclast

Chondrocyte

Hatching period of chick is.

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15 days

18 days

21 days

28 days

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

Gray vegetal cytoplasm gives rise to.

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Gut

Muscle cells

Notochord

Larval epidermis

Young tissues retaining the potential to divide.

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Meristem

Xylem

Phloem

Cork

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

A plant has a growth pattern called.

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Open growth

Meristem

Growing point

Apical

Neural plate is formed from

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Ectoderm

Endoderm

Mesoderm

Notochord

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.

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