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Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Give the reason for your answer.

2+2=

Organisms that are capable of self-nourishment are called:

Which of the following are involved in providing protection to the brain?

Menopause typically occurs in the age group of___ .

One of the following traits of the parents cannot be passed on to their future generations. This trait is :
(a) cleft chin
(b) pointed chin
(c) scarred chin
(d) broad chin

The factor/ factors which cause soil erosion is/are

Question 124(i)

The cell of a bacteria doubles in every 30 min. A scientist begins with a single cell. How many cells will be there after 12 hours?

Question 26

Karl Von Linne was involved with which branch of science?



(a) Morphology

(b) Taxonomy

(c) Physiology

(d) Medicine

Choose the incorrect statement about insulin:

Weismann cut off tails of mice generation after generation but tails neither disappeared nor shortened showing that

Which of these statements regarding mitosis is true?

An isolated population of humans, with
approximately equal number of blue-eyed and brown-eyed individuals, was
decimated by an earthquake. Only a few brown eyed people remained to form the
next generation. This kind of change in the gene pool is called a

___ hormone is vital for the correct development of the brain.

In humans, females have ___ sex chromosomes and males have ___ sex chromosomes.

Division of the nucleus during cell is called

One of the following nerves inhibit the rate of heart beat

Match the following:

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{i. Larynx}& \text{a. Air sacs}\\ \text{ii. Trachea}& \text{b. Lid of larynx}\\ \text{iii. Alveoli}& \text{c. Voice box}\\ \text{iv. Epiglottis}& \text{d. Wind pipe}\end{array}$

A plant with yellow pod and wrinkled seeds with genotype Yyww will give you the following gametes

Choose the correct set of effects of adrenaline hormone from the following list:

i. Faster heart beat

ii. Regular heart beat

iii. Increased alertness

iv. Faster breathing

With reference to the human ear, answer the questions that follow:
(a) Give the technical term for the structure found in the inner ear.
(b) Name the three small bones present in the middle ear. What is the biological term for them collectively?
(c) Name the part of the ear associated with (l) static balance (2) hearing (3) dynamic balance.
(d) Name the nerve, which transmits messages from the ear to the brain.

Explain transport of water and minerals in plants.

Human nervous system is composed of

Which of the following correctly represent the stages in ideal waste management?

What are the functions of collecting duct?

What is the primary function of the cuticle?

Consider the following statements.

i) Ears help our brain to sense from which directions the sounds are coming.

ii) Eustachian tubes equalize the air pressure on either side of the eardrum.

Question 1
What advantage does a terrestrial organism have an aquatic organism with regard to obtaining oxygen for respiration?

List any four methods of contraception used by humans. How does their use have a direct effect on the health and prosperity of a family?

Archaeopteryx is a missing link between:

Alternation of generations is seen in which of the following kingdom?

Windmills harness the ___ energy of wind.

Which of the following methods were used to study human evolution ?

If the fossil of an organism is found in the deeper layers of earth, then we can predict that :
(a) the extinction of organism has occurred recently
(b) the extinction of organism has occurred thousands of years ago
(c) the fossil position in the layers of the earth is not related to its time of extinction
(d) time of extinction cannot be determined.

Select the group of different substances which makes soil rich in nutrients.

RBC’s and WBC’s are derived from a common stem cell called

If glucose is synthesised in plants and we eat that plant than why do we need to synthesise glucose again in our body