Tissues — Science STD 9 — Question

Which one is made of dead cells:

Which is the following is known as “physical basis of life”?

1. Gene.
2. Protoplasm.
3. Nucleolus.
4. Mitochondria.

Find out the correct sentence.

1. Hybridization means crossing between genetically dissimilar plants.
2. Cross between two varieties is called as inter-specific hybridization.
3. Introducing genes of desired characters into a plant gives genetically modified crop.
4. Cross between plants of two species is called as inter varietal hybridization.

1. (i) and (ii)
2. (ii) and (iv)
3. (ii) and(iii)
4. (iii) and (iv)

_________ deduced that all kind of matter are made up of "anu".

The atomic numbers of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is:

1. A
2. B
3. C
4. D

Permanent tissues differ from meristematic tissue in:

Newton's third law of motion can be used to explain:

Each of the following statement describes a force acting. Which force is causing work to be done?

1. The weight of a book at rest on a table.
2. The pull of a moving railway engine on its coaches.
3. The tension in an elastic band wrapped around a parcel.
4. The push of a person's feet when standing on the floor.

The idea ‘omins cellula e cellula’ which means that all living cells arise from preecisting cells was given by:

The numerical ratio of displacement to distance for a moving object is: