Question

Answer the following Questions

1. Which of the following are heterotroph?
(a) Earthworms
(b) Mango trees
(c) Green algae
(d) Wheat
2. The stomata on the surface of the leaves helps in
(a) Exchange of gases
(b) Reduce the surface of the leaf
(c) Protect the leaf
(d) Prepare the food
3. Which pigment present in leaves help in photosynthesis?
(a) Cytoplasm
(b) Nucleus
(c) Chlorophyll
(d) Stomata
4. Why desert plants have reduced their leaves into spines?
5. In photosynthesis process what helps in the formation of carbohydrates?
6. Give one example of parasitic and saprophytic organism each?
7. Name the bacteria that helps in nitrogen fixation?
8. Plant A grows on plant B. Plant A provides food to plant B. plant B absorbs nutrients and water from the soil for Plant A. what type of interaction is this?
9. Name an article on which fungi can grow?
10. How the insect gets digested in insectivorous plants.
11. A class is learning about a plant that eats animals. Which one of the following is not a characteristic of such plants?
(a) These plants can not make their food by photosynthesis
(b) They grow in the soil that lacks nitrogen
(c) The trapped insect gets entangled in the hair like structure of the plant
(d) They grow in the nitrogen reach soil.
12. Which of the following about fungi are true?
(a) some fungi spoil food and cause diseases in animals and plants
(b) fungi releases carbon dioxide
(c) fungi are autotrophic
(d) fungi cannot grow on paper.


13. Based on the mode of nutrition animals are
(a) Saprotrophs
(b) Heterotrophs
(c) Autotrophs
(d) Parasitic
14. Why do desert plants have leaves converted to spines?
(a) To increase loss of water by transpiration
(b) To increase food gain
(c) To reduce loss of water by transpiration
(d) To reduce loss of food
15. Which of the following statements about saprotrophs are true?
(a) They eat insects because they grow in soil where nitrogen concentration is low
(b) They have chlorophyll but they do not perform photosynthesis
(c) They absorb nutrient from dead and decaying matter
(d) Yeast, mushrooms and bread molds are saprotrophic
16. In which of the following relationship both the organisms share nutrient and shelter
(a) A tick living on dog fur and sucking blood
(b) A plant trapping an insect
(c) A barnacle attached to the body of whale in order to move to different places
(d) Some species of fungi living in the roots of the tree 17. Which of the following is incorrect about nitrogen?
a. They are absorbed in the form of nitrites and nitrates
b. Nitrogen is one of the very essential elements to make protein
c. Root nodule bacteria Rhizobium can fix atmospheric nitrogen
d. Nitrogen can be directly taken up from the atmosphere.
18. Which cell organelle is not present in animal cell but found in plant cell?
19. What happen to the carbon dioxide released in the process of respiration in plants during the day time?
20. Tick the correct statement
a. Vacuoles are present in plant cell
b. Animal cells have a cell wall around them


Class 7 science Ch 1

Answer 1

Answer:

1 earthworm

2 exchange of gases

3 chlorophyll

Explanation:

5 star only pease