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According to Darwin, evolution is:

The nerve impulse in nerve fibre is conducted when permeability increases mainly of

Who was Ali? Where did
he go daily?

Question 3

How is the amount of urine produced regulated?

The process in which forests are first converted into pastures, then into arid land, and finally into deserts is known as _________.

Which of the following happens during Metaphase?

The spherical structure that contains the genetic material in a cell is

Why are the minerals essential in photosynthesis ?2 or 3 marks

Which of these defects is not usually detected by ECG?

Oxygen in lungs ultimately reaches_____.

Personal hygiene covers

Osmosis is the movement of solvent through a:

When people are not very familiar with a language, they sometimes explain words by paraphrasing them. Match the words in the box to the paraphrases below. Check in the dictionary if you are not sure.

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  It's a tropical tree, found near water, whose twisted roots grow partly above ground

  
  


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  It refers to the shape of an area of land, including its hills, valleys etc.

  
  


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  It is an area of sea in which there are many small islands

  
  


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  It is a group of similar things that are close together

  
  


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  It is to describe the course of a river, coast line or path that turns a lot.

  
  


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  This is to exist in an unpleasant or unwanted situation

  
  


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  They are all the wild animals that live in a particular area

  
  


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  It is an activity that involves swimming underwater using a breathing device

  
  


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  A type of prison, which is often in a place far away from other people

  
  


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  This is a person or living thing that has existed in a country or continent since the earliest time known to people

  
  

Are enzymes and catalysts same ?

What is the function of microvilli

A mass of lead is embedded in a block of aluminium (2 mm thick). Radiations from a radioactive source incident on the side of the block produces a shadow on a fluorescent screen placed beyond the block. The shadow of the block of aluminium is fainter than the shadow of lead. This difference is because

Estrogen and testosterone are steroid hormones and are most likely to bind to

Which of the following organisms can be used for artificial selection ?

Which one of the following organelles is correctly matched with its function?

Define all the following terms (starting the definition by using sentence the process ; and ending by called as.....)

Ingestion

Digestion

Absorption

Assimilation

Egestion

Stomatal openings are surrounded by__.

Which part of the eye is grafted in a needy patient from a donated eye ?
(a) Conjunctiva (b) Cornea
(c) Choroid (d) Ciliary muscles

Question 51
What will happen if mucus is not secreted by the gastric glands?

To facilitate cloning, a plasmid must have

Given below is a schematic break-up of the phases/stages of the cell cycle. Which of the following match is true?

Frond with air bladder is found in

(a) What is a 'cutting' in respect of plants for propagation purposes?
(b) What care should be taken while making a cutting from a plant?
(c) Describe the cuttings method for the artificial propagation of plants. Illustrate your answer with the help of labelled diagrams.
(d) Name any two plants which are usually propagated by the cuttings method.

Reflex actions like vomiting is controlled by

Identigi labels 'A' and 'B'

In a DNA double helix, the nucleotides of one strand are linked together by

Question 70

Why and how does water enter continuously into the root xylem?

Name the hormone, the lack of which leads to diabetes mellitus.