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The photosynthesis in a plant is not taking place during the day time if the plant is releasing :
(a) water vapour
(b) oxygen
(c) carbon dioxide
(d) all the above

Are all combustion reactions oxidation reactions? If not give example.

Question 33

The water conducting tissue generally present in gymnosperm is



(a) Vessels

(b) Sieve tube

(c) Tracheids

(d) Xylem fibres

Which of the following is a Genetic Disorder the impairs the Human Body's Ability to perform a process which is neede to stop bleeding?

Epiglottis guards the opening of

The nucleus of a cell which is not undergoing division is called

Which of the following statements is true in connect with variation?

Answer the
following questions.

(i)
Why are people considered a resource?

(ii)
What are the causes for the uneven distribution of population in the
world?

(iii)
The world population has grown very rapidly. Why?

(iv)
Discuss the role of any two factors influencing population change.

(v)
What is meant by population composition?

(vi)
What are population pyramids? How do they help in understanding about
the population of a country?

If a child has O type of blood group and the father B type, the genotype of the father will be:

Which of the following body parts are two in number ?

Trancription is different in enkaryotes and prokaryotes because

The wall of the eyeball is composed of 3 concentric layers:

The blob - like structure found at the tips of hyphae in Rhizopus is ________.

Question 26
The correct sequence of organs in the male reproductive system for transport of sperms is

(a) Testis → Vas deferens → Urethra
(b) Testis → Ureter → Urethra
(c) Testis → Urethra → Ureter
(d) Testis → Vas deferens → Ureter

Identify the myelin sheath.
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The mechanism by which sugars from leaves are transported through the phloem to growing tissues is called ___.

Radiations are harmful because:

Which cells in parathyroid gland secrete parathormone?

Which of the following statement is the correct meaning of afforestation?

Match the following:

$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{i. Binary fission}& \text{a.Cells produced are of unequal sizes}\\ \text{ii. Budding}& \text{b. Cells produced are of the same size}\\ \text{iii. Fragmentation}& \text{c. Gametes are produced}\\ \text{iv. Sexual Reproduction}& \text{d. Regeneration of whole organism from a split part}\end{array}$

The root of a plant is :

(i) positively phototropic but negatively geotropic

(ii) positively geotropic but negatively phototropic

(iii) negatively phototropic but positively hydrotropic

(iv) negatively hydrotropic but positively phototropic

Which of the following is accomplished in a plant by utilising the energy stored in ATP?
(a) transport of food
(b) transport of water and minerals
(c) transport of oxygen
(d) transport of water, minerals and food

Waste product/s produced by plants is/are

Which of the following is an example of a man-made ecosystem?

What possible plot line could the story continue with?

Why conjunctiva of old people turns yellowish white sometimes?

Despite this, economic pressures frequently drive both local communities and national governments in the developing world to ______these forests in an unsustainable way.

Statement 1: Glucose breaks down into a 3-carbon compound in the cytoplasm of the cell.

Statement 2: A pyruvate molecule breaks down into 3-molecules of carbon dioxide in mitochondria of the cell.

Describe the function of the heart.

Why do the plants need less energy than animals?

Define intercoastal muscles briefly.