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Why is there a need to improve the yield of food grains?

‘Fluid mosaic model’ of plasma membrane was given by

Consuming properly cooked food and boiled drinking water helps to protect us from which type of disease?

Give two examples of prokaryotic cell.

What are the methods used for soil replenishment?

Why is the cell called the structrural and functional unit of life?

Name the cell organelle in which following structures are present:

(a) Cristae;

(b) Stroma;

(c) Centriole;

(d) Chromosome

When the stamens are attached to the petals, they are called__i__, and when they are attached to the perianth, they are called__ii__.

The information in which alternative completes the given statement?

Which one of the following cells secretes an anticoagulant of blood?

Which of the following conditions give the most benefits? Why? [3 MARKS]
(a) farmers use high - quality seeds, do not adopt irrigation or use fertilizers.
(b) farmers use ordinary seeds, adopt irrigation and use fertilizers.
(c) farmers use quality seeds, adopt irrigation, use fertilizers and use crop protection measures.

Characteristics of smooth muscle fibres are

Single-celled eukaryotes are included in the kingdom

The number of chromosomes in humans is ___ .

In the pollination process, …………………. are carried by the pollinating agents

Prokaryotes are included in the kingdom___ .

Match the columns

What are sensory neuron and motor neuron?

Which of the following are bryophytes

These are minute biconcave disc-like structures, flat in the centre, thick and rounded at the periphery.

Which tissue is present in the eye lid?

Emergency contraceptives may prevent pregnancy if used within 72 hours of _________.

Pick the junk food from the given options.

Which of the following statements is wrong?

Question 54
Which organism is more complex and evolved among Bacteria, Mushroom and Mango tree? Give reasons.

Which cell organelle is called "kitchen of plant"?

What is the role of atmosphere in controlling temperature?

Choose the correct pathway for electrical impulse transmission through neuron.

The path of water in stomatal transpiration is

Write down four charactristics of Ctenophora and give two examples.

Which of the following is not an vestigial organ in humans?

Fill in the blanks

___i___is the volume of air that you take in during normal inspiration, or breath out during normal expiration. The additional volume of air a person can inspire, beyond the tidal volume by putting in extra effort is____ii_____. The additional volume a person can expire, beyond the tidal volume, that is, after a normal expiration is normally ____iii_____.The volume of air remaining in the lungs after a maximal expiration i.e., the residual volume is normally ____iv_____.

Question 31

Fill in the blanks



(a) A total of ___ nutrients are essential to plants.

(b) ___and ___ are supplied by air to plants.

(c) ___ is supplied by water to plants.

(d) Soil supply ___nutrients to plants.

(e) ___ nutrients are required in large quantity and called as ___.

(f) ___ nutrients are needed in small quantity for plants and are called ___.

Question 10

Write the type of joint which is used for each of the following movements:
(1) A cricket bowler bowls the ball.
(2) A girl moves her head in right and left direction.
(3) A person lifts weights to build up his biceps.

What is the thickness of cell membrane? [1 MARK]

Match the following.
$\begin{array}{cc}a)Pepsinogenissecretedby& I)Liver\\ b)Trypsinissecretedby& II)Pancreas\\ c)Bileisproducedin& III)Gallbladder\\ d)Bileisstoredin& IV)Gastricglands\end{array}$