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Veronika [31]
3 years ago
13

Carbon dioxide and oxygen enter and exit a leaf by diffusion. which structure(s) on a leaf allow(s) this process to happen?

Biology
1 answer:
Montano1993 [528]3 years ago
3 0
The stomata and their guard cells allows this happen.

Stomata is like a hole or gap on a leaf, most of them are present in a bottom side of the leaf, since waxy cuticle is not present over there. And 2 guard cells make up a stomata.

Guard cells are able to control the size of the stomata, depending on the situation. For example, the guard cells close up during day time because a lot of sunlight may cause more water loss.

In conclusion, guard cells and the stomata are the main structures that allow carbon dioxide and oxygen (water too) diffuse in and out of leaves.
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Which outcome is most likely if a nonnative species is introduced to an ecosystem
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Alright! <span>In most cases it will induce nutrition or sth. like that to the ecosystem because it's simply going to be eaten or die or whatever. Just a large amount of animals will be able to survive. They need to be lucky enough to stand the environment (temperature & stuff) and they need to be able to find food and water sources.
In this rare case (I heard it's less than 10%) it might have the luck to have no natural foes so it can spread. The fact that they might not have any natural foes might cause a strong reduction of their food source. So if you have a big ape that keeps on eating dodos and its population keeps on growing and there's nothing that stops it... then one day there will be no dodos left. You see, an alien species usually will not be specialized on one prey, (or food source) because if they were so specialized, they'd be specialized on a food source that you can find at their homes and not at their new environment. (so they would have died out in advance already). So they're likely to survive a little longer.

You have the cats and camels in Australia for example... there are huge masses of them and there are no real natural enemies to "stop" them.

You see, in the usual case there will always be a balance.
Imagine a fox only eats rabits... once there are no rabbits left, the population of foxes will shrink because there's almost no food. Population of rabbits will grow again which makes it possible for foxes to find food easily which will increase their population and as a consequence decrease the population of rabbits ;)
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2 years ago
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frosja888 [35]

1. What is the relationship between chromosomes and DNA? The chromosome is a molecule formed by a chain of DNA associated with proteins. Together, they form a group of molecules directly responsible for heredity.

2. What is heredity? It is the biological process where the genes present in a DNA are transmitted by parents to their children, through the division of gametes. These genes carry the codes that form the genotypic and phenotypic characteristics, which allows a similarity between parents and children to occur.

3. What is the role of proteins associated with the DNA molecule that makes up the gene? Proteins are responsible for keeping the DNA line tightly compressed, maintaining the chromosome structure. In addition, they control the activities of the genes present in this DNA molecule, being essential in maintaining heredity.

4. How do chromosomes participate in gene transmission? As mentioned above, genes are part of DNA and DNA is the molecule that makes up chromosomes, in this case, chromosomes are molecules loaded with genes. In the human body, cells have 46 pairs of chromosomes, with the exception of gametes that have half that number. During the reproductive process, the gametes (reproductive cells) divide and produce a new being. The mother's gametes unite with the father's gametes to form a new being. Each gamete has 23 chromosomes, which contain the genes responsible for transmitting the characteristics.

4 0
3 years ago
What are some events that involve matter and energy
natita [175]

Answer: The heating process and the freezing process

Explanation:

When ice is heated up and begins to melt, the matter that makes up the ice (water) is infused with energy. The energy causes the ice to melt into a liquid and then into a gas. As the energy becomes greater and faster, the heat is more effective on melting/evaporating the ice/water.

When water is put in the freezer to chill, the cold air causes the energy cells to slow down, causing air to condense into water, and water to freeze into ice.

These are some examples that are easier to understand than other concepts, but there are many more of these occurrences in the world!

4 0
3 years ago
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