Question # 1

Earthworm is the ideal example of tubular excretory system called

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Protonephridia

Mesonephridia

Metanephridia

Prenephridia

Highly condensed portions of the chromatin are called.

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Homochromatin

Heterochromatin

Euchromatin

Achromatin

Antidluretric hormone (ADH) released from posterior pituitary act to actively transport water from filtrate to kidney's

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Pelvis

Medulla

Cortex

Interstitium

Towards the end of pregnancy, the reduction in progesterone level, stimulates pituitary gland to produce.

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Oxytocin

Oestrogen

Androgen

Pro lectin

Nerve cells and eye lens cells remain in stage for life time.

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G0

G1

S

G2

Blue cone monochrome may is an X linked trait is which.

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Red cone cells are absent

Green cone cells are absent

Both red and green cone cells are absent

Blue cone cells are absent

Which one of the following is not an unpaired bone.

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Mandible

Vomer

Nasal

Sphenoid

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

Each bivalent has

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Twochromatids

Four chromatids

Both a & b

None of these

Chromosomes appear inside the nucleus at the time of.

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Cell division

Cell maturation

Cell elongation

Cell differentiation

Animals of the group of flatworms have simple tubular secretory system called of

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Kidney

Nephron

Protonephridia

Nephridia

The phase of meiosis during which nuclei disappear int he cell is called.

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Pachytene

Leptotene

Zygotene

Diplotene

According to endosymbiont hypothesis, the aerobic bacteria developed into.

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Ribosome

Lysosome

Mitochondria

Golgi apparatus

A change in the community structure of an ecosystem over a period of time is:

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Ecological niche

Ecological mutation

Succession

Genetic Drift

In seminiferous tubules repeated division of the germinal epithelium produce

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Oogonia

Zoogonia

Ovogonia

Spermatogonia

The unspecialized cells present in flatworm and Planaria are.

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Neoblast

Osteoblast

Osteoclast

Chondrocyte

Muscle present in the gut wall are.

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Smooth

skeletal

Cardiac

Voluntary

All are related to medulla oblongata, except.

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Long term memory

Breathing rate

Blood pressure

Heart beat rate

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