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In telophase, which of the following structures are reorganised?

Give the best example of parental care.

The movement of materials from leaves to other tissues throughout the plant is called:

How long osmosis usually take place or can continue?

Root hairs occur in the zone of:

Which detergent can cause maximum pollution?

Haemophilia is rare in women because

Forest areas receive ______ rainfall than the areas nearby.

Meiosis occurs in

Define variation.

Hernioplasty is the procedure to cure

Which part of the brain regulates movement and aids in the processing of auditory and visual information?

The term 'Genetics' was coined by

The thoracic and right lymphatic ducts return lymph to the ______.

Match the following:

Describe the functions of

(a) amnion

(b) placenta

How is glucose and starch produced in plants?

Cushings syndrome results from:

The major problems that might occur because of population explosion are

Which generation would cause more variations in bacteria?

Genetic improvement of the plants has become possible due to ___

The symbolic representation of chromosomes responsible for sex determination in human is ______.

What is the significance of reflex action.

Why do we do burp?

What is xylem tissue ? Name the two kinds of cells in xylem tissue. State whether these cells are living or dead.

Which of the following statements are true regarding osmosis?

Once the ovum is fertilised, the corpus luteum continues releasing progesterone to facilitate

Which of the following elements is not remobilized from one part of the plant to another?

Bholu's neighbour doctor asked him to drink boiled and cooled water for few days. Bholu instinctively asked "Why?". The doctor replied, "Prevention is better than cure". Help Bholu to understand the meaning of this phrase.

Which of these is true for hypothalamus?

(A) Controls the pituitary gland.

(B) Mainly responsible for calcium regulation.

(C) Secretes the releasing and inhibitory hormones.

(D) Controls the entire endocrine system.

Which of the following have the thickest wall?

Which of the following statement is true about the endocrine system?

Breathing is controlled by a centre in the

One of the following organism does not depend on simple diffusion of gases for breathing and respiration. This organism is :
(a) Amoeba
(b) Prawn
(c) Planaria
(d) Bryophyllum

Assertion: Formations of new species and variations lead to evolution.

Reason:All genetic variations lead to formation of varieties of organisms

A Student was given two permanent slides, one of binary fission in amoeba and other of budding in yeast. He was asked to identify any one difference in the nucleus of the two. One such difference, he identified correctly was

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

The technique of reproduction in Hydra shown below is:

Name the enzyme which help in digestion of the foods shown below in small intestine:

I- Amylase, II - Lipase

I- Lipase, II- Trypsin

I- Bile juice, II- Pepsin

I- Protease, II – Amylase

Which of the following components will be absent if the cell has no nucleus?

Name the three components of a neuron (or nerve cell).

P, Q, R and S are four major types of phytohormones. P is a phytohormone which functions mainly as a growth inhibitor. It promotes the wilting and falling of leaves. Q, R and S are phytohormones which all promote the growth of plants in various ways. Q is responsible for the phenomenon of phototropism in plants. R is involved mainly in shoot extensions. The phytohormone S helps in breaking the dormancy of seeds and buds. What are P, Q, R and S ? Give one reason each for your choice.

Identify the renal pyramids in the given figure.

The concept of chemical evolution is based on:

Which of these systems in the human body is responsible for the control and coordination of different bodily functions?