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Which of the following is an important criterion for development of a country?

List some of the microbial products which are used everyday.

Which of the following is a function of adrenaline?

Which one of the following is the correct difference between Rod Cells and Cone Cells of our retina? (Specify the number)

Write any 6 differences between autotrophic and heterotrophic nutrition.

Name the cell component which is visible only during cell division stages.

Which of the following characters are present in class Crustacea?

The empty spaces between the cells of the organs is filled by____.

The wheat grain has an embryo with one large, shield-shaped cotyledon known as:

If two pairs of characters are crossed in pea plants, then they show an independent inheritance because:

Write the advantages of reproduction through spores.

Myoglobin is present in

Which of the following cannot reach the foetus through the placenta?

Which one of the following is an example of pollutant ?

(a) A rat entering your kitchen.

(b) $C{O}_2$ given out by the respiring organisms.

(c) The heat given out while cooking food.

(d) The dust raised during road-cleaning

In female, after how much time after fertilisation, does the fertilised egg get implanted in the uterine wall ?

(a) few months (b) one month

(c) three weeks (d) about seven days

What is meant by persistence of vision?

Name the gaseous raw material essential for the production of starch in plants through photosynthesis.

Neurilemma is

Which surface (upper or lower ) is the dorsal and which is ventral side of a leaf?

Which among the following statements is/are true regarding Industrial Melanism?

Introducing weakened germs to stimulate the production of antibodies is called _________

What is parasympathetic nervous system?

Name any two bacteria which multiply rapidly.

One copy of the gene or one allele is sufficient to create all the damage and cause the disorder in

An abnormal increase in the number of RBC is called

What are the functions of vili

More variation in traits can be observed in _________ reproduction.

Which of the following disasters are not correctly matched to their categories?

What are the homologous pair of chromosomes?

In a natural population, phenotype is called ___.

All female mammals possess __ that secrete milk.

___ plays an important health role because it helps maintain body temperature by cooling us down.

How do water get absorbed continuously by roots?

What is a potometer ?

If insufficient PTH is produced, the blood Calcium level drops, resulting in ______.

Which of the following shows relationship between echinoderms and chordates?

When we touch a hot plate unknowingly, then this heat is sensed by a receptor P present in our fingers. The receptor triggers an impulse in neuron Q which transmits the message to an organ R which is a part of the central nervous system. Here the impulse is passed on to a neuron S which in turn passes it to a yet another neuron T. The neuron T passes the impulse to a tissue U in our arm. The tissue U then contracts and pulls our hand away from the hot plate.

(a) What is the name of (i) receptor P (ii) neuron Q, and (iii) organ R ?

(b) What is (i) neuron S, and (ii) neuron T ?

(c) Name the tissue U.

(d) What name is given to the phenomenon in which hand is pulled away quickly from the hot plate ?

(e) Name the effector in this whole process.

If a DNA sample contain 23.8% cytosine resedues, then amount of thymine present in the same DNA sample is

The part of brain which controls the involuntary actions such as heart beat, breathing, blood pressure, etc. is :

(a) pons

(b) medulla

(c) cerebrum

(d) cerebellum