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（请给出正确答案）
A.donate
B.check
C.withhold
D.release
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更多“Green plants take in carbon dioxide and give off oxygen in a food-making process called ph”相关的问题
根据以下材料，回答题
An Essential Scientific Process
All life on the earth depends upon green plants. Using sunlight， the plants produce their own food. Then animals feed upon the plants. They take in the nutrients the plants have made and stored.
But that"s not all. Sunlight also helps a plant produce oxygen. Some of the oxygen is used by the plant， but a plant usually produces more oxygen than it uses. The excess oxygen is necessary for animals and other organisms to live.
The process of changing light into food and oxygen is called photosynthesis. Besides light energy from the sun， plants also use water and carbon dioxide. The water gets to the plant through its roots. The carbon dioxide enters the leaves through tiny openings called stomata. The carbon dioxide travels to chloroplasts （叶绿题） ， special cells in the bodies of green plants. This is where photosynthesis （光合作用 ） takes place. Chloroplasts contain the chlorophylls （叶绿素） that give plants their green color. The chlorophylls are the molecules that trap light energy. The trapped light energy changes water and carbon dioxide to produce oxygen and a simple sugar called glucose.
Carbon dioxide and oxygen move into and out of the stomata. Water vapor also moves out of the stomata. More than 90 percent of water a plant takes in through its roots escapes through the stomata. During the daytime， the stomata of most plants are open. This allows carbon dioxide to enter the leaves for photosynthesis. As night falls， carbon dioxide is not needed. The stomata of most plants close. Water loss stops.
If photosynthesis ceased， there would be little food or other organic matter on the earth. Most organisms would disappear. The earth"s atmosphere would no longer contain oxygen. Photosynthesis is essential for life on our planet.
In the first paragraph， the word "excess" means___________ . 查看材料
A.heavy
B.extra
C.green
D.liquid
PART C
Directions: You will hear three dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.
听力原文： Green plants can produce their own food. They use substances in the environment. This process is known as photosynthesis. In contrast, all animals including humans, get their food either directly from plants or indirectly by eating animals which have eaten plants. So animals take in a wider range of foods than plants.
Plants are generally stationary. They do not have the power of locomotion. Animals, on the other hand, can usually move around. Therefore, plants appear to be less sensitive than animals although they respond in some ways to light, heat, physical contact and other stimuli.
In external appearance plants are usually green. They grow in a branching fashion at their extremities. Their growth continues throughout their lives. Animals, however, are very diverse in their external appearance. Their growth pattern is not limited to their extremities but is evenly distributed. Growth occurs in a definite period of time.
The most basic difference between plants and animals is in the unit of structures and functions: i.e. , the cell. Plant cells have a wall which is nonliving in chemical nature whereas animal cells do not have this characteristic.
What is the most fundamental difference between plants and animals？
A．Plants produce their own food but animals don't.
B．Plant cells have a wall which is non-living in chemical nature but animal cells haven't.
C．Plants are green but animals aren't.
D．Plants can't move but animals can.
听力原文： We have just climbed out of a spaceship onto the surface of the moon. Behind us is the ship, half in the sunlight and half in deep shadow. A few miles ahead is a wall of mountains towering against the black sky. And there, as though resting on the mountains, is a great ball of light, beautifully colored in blue and green and brown with a patch of dazzling white at the top. It is our faraway world —the earth.
We take a step and rise like prize jumpers —up, float, and down again. Hopping carefully, we explore the valleys, the sloping crater walls, the shadowy crater floors.
Not a sound can be heard —there is no air to carry sound, no wind; there are no smells, no plants, no animals. There is nothing but rock and dust, blinding sunlight and cold black shadows.
(37)
A．On the earth.
B．On the moon.
C．At sea.
D．In a spaceship.
just on rugged mountain peaks but also on sunbaked desert rocks. They are usually the
first life to appear on a mountainside that has been scraped bare by an avalanche.
Unlike other members of the plant kingdom, lichens are actually a partnership between
5 two plants. The framework of a lichen is usually a network of minute hairlike fungus that
anchors the plant, The other component is an alga (similar to the green film of plant life
that grows on stagnant pools) that is distributed throughout the fungus. Being green plants,
algae are capable of photosynthesis--that is, using energy from the Sun to manufacture
their own food. The fungi arc believed to supply water, minerals, and physical support to
10 the partnership.
Lichens are famous for their ability to survive ~ water shortage. When water is scarce
(as is often the case on a mountain), lichens may become dormant and remain in that
condition for prolonged periods of time. Some lichens can even grow where there is no
rain at all, surviving on only occasional dew--the moisture that condenses on the surface
15 of the plants at night, And unlike most other plants, lichens are little affected by the strong
ultraviolet rays in the mountains.
Lichens use little energy, for they grow slowly. Some grow so slowly and are so old
that they are called "time stains." You may find lichens that are centuries old; certain of
these lichen colonies have been established for an estimated 2,000 years.
20 For decades, scientists wondered how the offspring of an alga and a fungus got together
to form. a new lichen, it seemed unlikely that they would just happen lo encounter one
another. It was finally discovered that in many cases the two partners have never been
separated. Stalklike "buds" that form. on certain lichens are broken off by the wind or by
animals; these toll or are blown to a new location
Which of the following questions does the passage answer？
A．Where can the oldest lichens be found？
B．How long does it take for lichens to establish themselves？
C．How large can lichens he？
D．Where do lichens usually occur？
A.a green crown
B.a green song
C.a green thumb
D.a green pond
Small plants like grasses and herbs are grown widely on intensive green roofs.
A．Right
B．Wrong
C．Not mentioned
A、green 'house (=house painted green)
B、'greenhouse (=glass house for growing plants)
A、green HOUSE(=house painted green)
B、GREENHOUSE(=glass house for growing plants
Small green plants are very important to dry places because______.
A．they don't let the sun make the earth even drier
B．they don't let the wind blow the earth away
C．they hold water
D．all of the above
2. The fruit color of squash is controlled by two pair of genes W (white) /w and Y (yellow) /y (green). When two plants with white fruit color cross each other, the phenotype of offspring is White: Yellow: Green = 12:3:1. Question: (1) What are the genotype of parents with white fruit color？ (2) Which is the interaction type of these two non-allelic？ (3) What are the genotypes of white, yellow and green fruit plants in the offspring？ (4) If the white fruit color plants in the offspring cross with a green fruit color plant, half of the offspring are yellow. What is the genotype of the white fruit color plant？ Why？
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