The problem of plant photosynthesis is very simple, and it may be possible to give points when you c

Wrong. 1. First of all, it can be said from the point of view of oxygen content, and many people have the same opinion.

Plants have photosynthesis, which synthesizes substances such as sugars and releases oxygen. At the same time, plants, like animals, have a respiration function, absorbing oxygen and exhaling carbon dioxide. Like animals, plants respire day and night.

However, during the day, plants also have photosynthesis, that is, inhaling carbon dioxide, converting the carbon into sugars needed for plant growth, and releasing oxygen at the same time. Because of this, plants play an important role in human beings and nature. Photosynthesis can only take place when there is light energy, so plants cannot photosynthesize at night.

This leads to your brother's conclusions. But this is only a conclusion based on the understanding of the book, and it is not necessarily entirely correct.

2. After a night of respiration by plants and animals, photosynthesis has not yet started in the morning, and the oxygen in the air will be less than other times, but less oxygen does not mean that the air quality is poor, in fact, in terms of air quality, the air quality should be the best time of the day within 1-2 hours after the sun rises in the morning, because compared with the impact of plant breathing on air quality, the impact of human activities on air quality is more important. The air pollution caused by human activities has been precipitated overnight, and the air is freshest in the early morning before human activities have started, especially in large cities.

So, your brother's argument emphasizes the effect of plant respiration on oxygen levels while ignoring the more important human activity, and the conclusion is only one-sided.

From the earth's point of view, when it is night on our side and daytime in the other hemisphere, then the plants there can photosynthesize, and because the air is fluid, there is basically no huge air quality problem caused by the respiration and photosynthesis of plants.

Otherwise, according to your brother's meaning, the trees in the north are bald in winter and cannot photosynthesize, and everyone has to hold an oxygen cylinder, otherwise they will suffocate and pull...

Not exactly. The lowest levels of oxygen are before dawn, not in the morning. Oxygen concentrations are highest in the evening. In addition, oxygen concentration alone should not be considered as the only indicator of how good or bad the air is.

Not all plants are capable of photosynthesis. Not all plants can photosynthesize, they must contain enough chloroplasts for photosynthesis. In the deep sea or some plants that do not have chloroplasts are not able to photosynthesize.

The process of photosynthesis is a relatively complex problem, on the surface, the total reaction formula of photosynthesis seems to be a simple redox process, but in essence it includes a series of photochemical steps and material transformation problems.

Reaction process:The process by which green plants use the sun's light energy to assimilate carbon dioxide (CO2) and water (H2O) to make organic matter and release oxygen is called photosynthesis. The organic matter produced by photosynthesis is mainly carbohydrates and releases energy.

Not all plants are capable of photosynthesis.

Chloroplasts are the basic conditions for plants to photosynthesize, so no plant without chloroplasts can photosynthesize.

Mononuclear algae such as cyanobacteria and globular algae, as well as parasitic plants such as gastrodia and silk seeds of the orchid family.

Cuscuta chinensis lam), also known as Zen Zhen, Bean Parasitism, Bean Yama King, Yellow Silk, Yellow Silk Vine, Golden Silk Vine, etc.

Annual parasitic herb. The stems are winding, yellow, slender, leafless. The inflorescences are lateral, with few or many clusters of flowers forming small umbels or small clusters of umbels; bracts and bracts small, scaly; peduncle slightly stout; calyx cup-shaped, commissurated below the middle, lobes triangular; corolla white, pot-shaped; stamens bearing corolla lobes bent slightly below; scales oblong; The ovary is nearly spherical, columella 2.

The capsule is spherical in shape, almost entirely surrounded by a corolla. Seeds 2-49, light brown, ovate, about 1 mm long, with a rough surface.

The Flower of the Underworld "has no leaves or flowers, and instead has white scales all over the plant, which usually clings to dead creatures to draw nutrients, which is where it comes from."

Plants that don't need to photosynthesize, but are covered in scales and are called "flowers of the underworld" (what are some plants that can't photosynthesize?). -Zhihu (

Plants that do not photosynthesize can survive as long as they can get enough energy. It is mainly divided into two categories: parasitic plant rights and saprophytic plants.

Strictly speaking, parasitic plants still have a lot of photosynthesis. For example, mistletoe and mulberry parasitism all have leaves, of course, the most cattle's parasitic plants should be heavy parasitic plants, these guys are parasitic on the parasitic plant mulberry parasitism. These plants are almost reduced to the point of having only inflorescences, they live entirely on the host, and all the nutrients are drawn from the host's vascular bundles.

Photosynthesis is certainly not required.

There are many orchids that are saprophytic and live like mushrooms. For example, we are familiar with gastrodia. As well, some coral orchids and mesa orchids.

These plants rely on symbiotic fungi that break down cellulose in decaying plants for nutrients. These plants also do not need to photosynthesize.

Not all plants can photosynthesize, for example, Cuscuta is a parasitic plant and cannot photosynthesize.

Plants with green leaves are able to photosynthesize. Nutrients are made through photosynthesis.

All living things on Earth need oxygen to breathe, and we all know that plants can photosynthesize, so how do plants make oxygen?

Photosynthesis, that is, photoenergy synthesis, is a biochemical process in which plants, algae, and certain bacteria, under the irradiation of visible light, undergo light reactions and dark reactions, using photosynthetic pigments, to convert carbon dioxide (or hydrogen sulfide) and water into organic matter, and release oxygen (or hydrogen). Photosynthesis is the sum of a series of complex metabolic reactions, which is the basis for the survival of the biological world and an important medium of the earth's carbon and oxygen cycle.

The process of photosynthesis consists of two stages: light reaction and dark reaction

Light reaction. Photolysis of water: 2H2O4[H]+O2 (providing reduced hydrogen for dark reactions) ATP formation:

ADP + PI + Light Energy — ATP (provides energy for dark reactions) dark reactions. Fixation of CO2: Reduction of CO2+C5 2C3C3 compounds:

2c3+[h]+atp→(ch2o)+c5