Biology - NCERT Solutions - GeniusJnr

A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows:

0.03 0.08 0.08 0.09 0.04 0.17

0.16 0.05 0.02 0.06 0.18 0.20

0.11 0.08 0.12 0.13 0.22 0.07

0.08 0.01 0.10 0.06 0.09 0.18

0.11 0.07 0.05 0.07 0.01 0.04

(i) Make a grouped frequency distribution table for this data with class intervals as 0.00 - 0.04, 0.04 - 0.08, and so on.

(ii) For how many days, was the concentration of sulphur dioxide more than 0.11 parts per million?

Which of the following species cannot interbreed but is difficult to separate on the basis of only morphological characters?

STATEMENT 1:
An astronaut in an orbiting space station above the Earth experiences weightlessness.
STATEMENT 2:
An object moving around the Earth under the influence of Earth’s gravitational force is in a state of ‘free- fall’.

A monograph is the detailed study of

Use the following information to answer the next question.

The first word in a biological name of an organism represents the, which always start with aletter.

The information in which alternative completes the given statement?

Use the following information to answer the next question.

Emily has five gold fishes in her glass aquarium. She feeds them regularly. One day, she accidentally switches off the air circulation pump of the aquarium and the next morning, she finds that three of the fishes have died.

The fishes in the aquarium die because of the lack of

In which of the following figures is the parent not paired with its young one?

Which of the following organisms is an adult?

Which of the following would be classified as “living”?

Most living organisms have common needs. Animals and plants also share some common needs.

Which of the following factors is essential for plants but not for animals?

Which of the following is not a characteristic of all living things?

Which of the following statements about movement in living organisms is not correct?