Question # 1

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

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Light

Oxygen

Water

Carbon dioxide

Primary tissue is added by the

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Lateral meristem

Underground meristem

Apical meristem

Vertical meristem

From Hensen's node,dorsal mesoderm is formed and is organized into

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Segments

Fragments

Somitcs

Remains

Clear cytoplasm, in an ascidian zygote produces.

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Muscle

Gut

Notochord and neural tube

Larval epidermis

Oxytocin is secreted by the endocrine gland named:

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Pituitary gland

Thyroid gland

Parathyroid gland

Adrenal gland

Intercalary meristems are situated at.

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Root apex

Shoot apex

Base of internode

Top of internode

Parathyroid hormone acts to ensure that

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Calcium levels in the blood never drop too low

Sodium levels in urine are constant

Potassium levels in the blood do not escalate

The concentration of water in the blood is sufficient

If lobster loses its pincer claw a new claw

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Regenerates

Never develops

IS ready

None of these

Deficiency of vasopressin or ADH by the pituitary gland leads to a disorder in which the patients kidney have lessoned ability to absorb water is:

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Diabetes mellitus

Diabetes insipidus

Goiter

Exophthalmic goiter

In which developmental stage, germ layers are formed.

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Cleavage

Blastula

Gastrula

Organogenesis

Movement of rearrangement of the cells in the embryo is called.

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Cleavage

Gastrulation

Fertilization

Organogenesis

In addition to auxin which hormone also play important role in apical domince

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Abcesic acid

Gibberellins

2,4-D

Cytokinins

The unspecialized cells present in flatworm and Planaria are.

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Neoblast

Osteoblast

Osteoclast

Chondrocyte

Clear cytoplasm produces

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Larval epidermis

Muscle cells

Gut

Neural tube

On the basis of structure and shape of the cap,two species of Acetabularia have been identified

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Acetabularia mediterrance & A.crenulata

A.typhi & A.mediterranea

A.crenulate & A.sisso

A.crenulata & A.arabica

The addrenaline cortex produces ______________

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Adrenaline

Calcitonin

Epinephrine

Aldosterone

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.

Which of the following hormones is not released by the anterior pituitary?

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Melanocyte - releasing hormone

Gonadotropin-releasing harmone

Thyroid- stimulating hormone

Growth hormone

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