D. Answer the following questions.
L. Diferentiate between living things and non-living things
2 Describe the cellular organisation in living beings.
3. With the help of an example, explain stimulus and response in plants.
4. What do you understand by the term 'respiration? Why do living things need to respire?
5. Define photosynthesis. Name the things needed by plants to carry out photosynthesis.
6. Define ecosystem. What are the different living and non-living components of our
7 Observe the picture given below. Label the picture and describe in your own words how
recycling of nutrients take place in nature.
Answers
Answer:
question no 1
living things who can breathe.
non living things who can not breathe
Answer:
1) :
Living Things Non- Living Things
1}Living things are made up of living cells
Non-living things are not made up of cells
2}Require food, air and water
Do not require food, air and water
3}Growth is present
Growth is absent
4}Reproduction is present Jim
Reproduction absent
5}Respiration present
Respiration absent
6}They can move on their own
They cannot move on their own
7}They are sensitive and respond to changes around them
They are not sensitive and do not respond to changes around them
8}They excrete and get rid of waste materials from their body
They do not excrete
9}Living things have a definite life span after which they die
Non-living things do not have definite life cycle
2} : Cellular organization is the basic tool which acends from simplest to complex one.
Starting from base Atom organized into molecule into organelle and here comes the Cell.
Cell are combined to form tissue, tissue into organ, organ into Organ system, and finally into Living organism.
Cellular organization may be diploblastic and triploblastic without or with organ system.
For example, many individual organisms can be organized into the following levels: Cell: Basic unit of structure and function of all living things. Tissue: Group of cells of the same kind. ... Organ system: Group of organs that work together to perform a certain function.
3} : A tropism is a response that an organism makes to a stimulus. An example of a common tropism in plants is phototropism (or light response). Plants grow towards light sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.
4} :
All living things respire because they need energy to grow, to replace worn out parts and to move. Respiration takes place in the mitochondria of the cell. There are two types of respiration, with and without oxygen. Aerobic respiration uses oxygen and releases a large amount of energy
5) :
ANSWER
Photosynthesis is the process by which photosynthetic organisms (Green plants, algae, photosynthetic bacteria) capture light from the sun and is converted into the chemical energy, in the form of carbohydrate (starch)
with the help of atmospheric carbon dioxide and water to carry out vital functions of living things.
The basic substances for photosynthesis are Chlorophyll, Sunlight, Carbon dioxide, and Water.
Chlorophyll: It is a green color pigment, present in the chloroplast of the plant cell. The two components of Chlorophyll a, PSI (photosystem I) and PSII (photosystem II) absorbs sunlight and the captured energy further used to split the water molecules.
Sunlight: Photosynthesis is a light-dependent process; thus, the specific wavelength of sunlight (red and blue) excites the photoreceptor (chlorophyll) to carry out the photo-chemical reaction.
Carbon dioxide: This gas is abundantly present in the atmosphere. Plants absorb carbon dioxide through the small openings present on the leaf surface, known as stomata.
Water: Plants absorb required water from the ground through their roots, and water transported to the leaves via stem through a complex transport tissue, the xylem.
6) :
An ecosystem can be categorized into its abiotic constituents, including minerals, climate, soil, water, sunlight, and all other nonliving elements, and its biotic constituents, consisting of all its living members
7} :
Nutrient recycling is the way in which elements are continuously being broken down and/or exchanged for reuse between the living and non-living components of an ecosystem. Carbon forms part of all organic nutrients – carbohydrates, fats and proteins.
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