"Green plants are the producers of organic matter in the biosphere" PPT courseware 5

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"Green plants are the producers of organic matter in the biosphere" PPT courseware 5

Think about it, discuss it

In addition to providing a sheltered habitat for frogs, what other important role do green plants play in frogs' lives?

Indirectly provide a food source.

(Because the food of most frogs is insects, most insects feed on green plants.)

Self-learning:

Look for the following four questions:

1. What is the role of dripping iodine solution in the test?

2. What is the role of alcohol in the experiment?

3. What are the products of photosynthesis?

4. Does photosynthesis have to occur under light?

experiment

Green leaves create organic matter under light

Purpose requirements

1. Check whether the organic matter produced by green leaves under light is starch.

2. Explore whether light is an indispensable condition for green plants to produce organic matter.

Experimental Materials

Geranium, also known as anemone and hydrangea. It is a perennial herbaceous plant belonging to the family Ermiaceae. The whole plant has fine hairs. Native to South Africa. Its flowers are colorful, have a long flowering period, and are easy to cultivate. They are important greenhouse potted flowers.

It is intolerant of heat and requires shade in midsummer. It is afraid of moisture and tolerates dryness. Propagation is mainly based on cuttings

The concept of photosynthesis

Green plants use the energy provided by light to synthesize starch and other organic matter in their chloroplasts, and the process of converting light energy into chemical energy and storing it in the organic matter is called photosynthesis.

So we say that plants produce a large amount of organic matter through photosynthesis. What are the functions of these organic matter?

Organic matter produced by green leaves can be transported throughout the plant through sieve tubes in the leaf veins, petioles, and stems.

2. From the organ level

Fruits such as apples and pears are rich in sugars

Soybean and peanut seeds are rich in protein and fat

Sesame and sunflower seeds contain more fat

Sweet potato roots and lotus root stems are rich in starch

3. From the individual level

Most of the substances that make up the dry weight of plants are organic matter, and only a very small part is inorganic salts.

The organic matter produced by green plants nourishes other living things

Herbivores: feed directly on plants.

Carnivores: feed indirectly on plants, and their food comes directly from various animals.

Omnivore: Feeds directly or indirectly on plants.

Green plants not only provide other organisms with materials to build themselves, but also provide other organisms with energy for life activities.

1. The correct order of the following experimental steps for "green leaves produce organic matter under light" is:

① Use alcohol to remove chlorophyll

②Put the geranium leaves under the light

③ Cover part of the geranium leaves with black paper

④Put the geranium in a dark place for a day and night

⑤Pick off the partially shading leaves and remove the black paper

⑥Rinse the leaves with clean water and add iodine solution

2. Take a piece of leaf made of a leaf that turns blue after adding iodine solution and observe it under a microscope. The blue part is ( )

A. All cells of leaves

B. Leaf epidermal cells

C. The part of leaf cells containing chloroplasts

D. Leaf cells contain parts other than chloroplasts

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For more information about the PPT courseware "Green plants are the producers of organic matter in the biosphere", please click the "Green plants are the producers of organic matter in the biosphere" ppt tag.

"Green plants are the producers of organic matter in the biosphere" PPT courseware 7:

"Green plants are the producers of organic matter in the biosphere" PPT courseware 7 Learning objectives: What conditions are needed for green plants to produce organic matter? What are the main organic substances produced? 1. The purpose of the experiment is to test whether the organic matter produced by green leaves under light is starch.

"Green plants are the producers of organic matter in the biosphere" PPT courseware 6:

"Green plants are the producers of organic matter in the biosphere" PPT courseware 6 Review the past and learn the new 1. Comparing plant cells with animal cells, the structures that plant cells have but animal cells do not are: _________, _________, _________, among which _________ is photosynthesis. ..

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"Green plants are the producers of organic matter in the biosphere" PPT courseware 4. From the previous study, we know that biology and the environment are a unified whole, and this unified whole is the ecosystem. Plants, animals, fungi and many microorganisms are divided into ecosystems...

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Update Time: 2024-11-21

This template belongs to biology courseware People's Education Edition seventh grade biology volume 1 industry PPT template

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