Question

(a)
Q.1. (A) Do as directed:
Write the correlated terms.
Mumbai : 5000 tonnes of solid waste :: Pune:
(b) Yoghurt : Lactobacilli :: Bread:
(2)
Write whether the following statements are true or false, if false correct the statement.
1
(a) The number of consumers in a food web is fixed.
1
(b) AIDS is caused by a virus.
1 (3) Find the odd man out: Nephrolepis, Marsilea, Cycas, Lycopodium
1 Q.1. (B) Select the correct option and write the completed statements:
(5)
Leaves of ............... show reticulate venation.
I
(a) Bamboo (b) Banana (c) Onion (d) Banyan.
(2) Lactobacilli kill the harmful bacteria like
present in the alimentary canal.
(a) Rhizobium (b) Saccharomyces (c) Clostridium (d) Alcanivorax
(3) The information stored in ROM is only ........
changes cannot be made.
(a) external memory (b) readable (c) accessible (d) physical
is the most important source of energy in any ecosystem.
(a) The Sun (b) The Moon (c) Producers (d) Decomposers
1 (5) Atmospheric conditions at a specific time at a particular place are referred to as
(a) environment (b) weather (c) climate (d) biosphere
Q.2. Answer the following. (any 5)
(10)
(1) Write a short note on Trophic level. (2) Which vaccines are given to infants? Why?
(3) Define: (i) Program (ii) Hardware
(4) Distinguish between monocots and dicots.
(5) Energy flow through an ecosystem is one way". - Give scientific reason
(6)
Draw a neat labelled diagram of Spirogyra. () What is the advantage of Rhizobium to farmers?
Q.3. Answer the following: (any 5)​

Answer 1

Answer:

sorry don't know the answer

Explanation:

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Answer 2

Answer: Q 1

(A)1600

(B)Yeast

2

(A)False

(B)True

3

(A)Marsilea

(B)

1. Bamboo
2. Clostridium
3. Physical
4. Sun
5. Weather

Q 2

1. Trophic level can be defined as the position of an organism in food chain.
2. BCG for protection against Tuberculosis, OPV 0 for protection against Polio and HB 1 for Hepatitis.
3. A program can be defined as a set of instruction given to a computer which it further uses as a command to perform a certain function.          ii) Hardware are the components of computer's mechanics that stores data and executes the working of a computer.
4. Monocots contains single cotyledon whereas Dicots have a pair of cotyledons in the embryo.
5. The energy passes from one trophic level to another in unidirection. Hence, the flow of energy in an ecosystem is one way.
6. Rhizobium helps farmers as it is greatly efficient at fixing the nitrogen of the soil in the legumes which helps the fertility of soil.

Explanation: Q 1

(A) 1600

Pune produces 1600 tonnes of solid waste everyday.

(B) Yeast

As the formation of yogurt is encouraged by Lactobacilli in the same way, Yeast helps in the production of Bread.

(2)

(A) False

The number of consumers in a food web is not fixed, it may change depending upon the complexity of the web.

(B) True

(3)

(A)Marsilea

This is a water oriented plant genre whereas others are land based.

(B)

1.  Bamboo

The leaves of show reticulate venation.

2. Clostridium

Lactobacilli kill the Clostridium bacteria in the human alimentary canal.

3. Physical

The ROM can not be changed once made. Only the physical appearance can be changed.

4. Sun

The sun is the most important source of energy in the ecosystem as all other phenomenons depend upon the sun.

5. Weather

Weather is the atmospheric conditions for a particular area for a short period of time.

Q 2

(1) Trophic level

The trophic level can be defined as the position of an organism in a food chain.

For example:

Plant ⇒ Goat ⇒ Lion

In this food chain, the trophic level of goat is 2.

(2) Vaccine

1. BCG (Bacillus Calmette Guerin) protection against Tuberculosis.
2. OPV 0 (Oral Polio Vaccine) for polio.
3. HB 1 (Hepatitis B) for Hepatitis.

(3) Define

1. Program : It is a set of instruction given to a computer which it further process as a command for a function.
2. Hardware : The components of computer's mechanics which stores the data.

(4) Monocots and Dicots

Monocots have a single cotyledon in the embryo while dicots have a pair  of cotyledons.

(5) The energy passes from one trophic level to another in unidirection. Hence, the flow of energy in an ecosystem is one way.

(6) Rhizobium helps farmers as it is greatly efficient at fixing the nitrogen of the soil in the legumes which helps the fertility of soil.

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