Explain why the two ecosystems have such different kinds of plants. Use the terms biotic factor, and limiting factor in the explanation

Two ecosystems might have different species of plant this is as a result of the nature of the ecosystem and the ability of plants to thrive in them.

Explanation:

An ecosystem can be defined as a community of organisms living together and interacting with their physical environment. There are different types of ecosystems but they are all categorized under terrestrial and aquatic habitats. They include forests, grasslands, deserts, freshwater and marine.

In the desert ecosystem an example of a plant that grows there is the cactus plant, this is as a result of their ability to conserve water.

In freshwater ecosystem, an example of a plant found there is the waterlily this is due to their unique ability to survive on water surfaces.

These different plant species are affected by different limiting factors in their ecosystems such as temperature, sunlight, nutrients.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.