Study an ecosystem of your choice such as a meadow, a patch of forest, a garden , or an area of wetland. (If you cannot do this physically, do so virtually by reading about an ecosystem online. Determine and list five major plant species and five major animal species in your ecosystem. Write hypotheses about which of these species, if any, are indicator species. Which of them, if any, are keystone species

In a wetland ecosystem:

1- Indicator species: turtles

2- Keynote species: freshwater crayfish

Explanation:

A wetland is an ecosystem either covered with water or saturated with water. Examples of plants living in wetland ecosystems include water lilies lotus, trees (e.g., swamp she-oak), mosquito fern, eelgrass (Vallisnaria spiralis), etc. Examples of animals living in wetlands include dragonflies, mosquitoes, alligators, salamanders, snakes, turtles, grouse, plover, etc. Alligators and freshwater crayfish can be considered keystone species because they are fundamental and their presence defines wetland ecosystems (without these species, wetlands would be dramatically impacted). Moreover, turtles can be considered indicator species because their abundance and distribution in a wetland is an indicator of environmental conditions. These animals (turtles) carry around different organisms (e.g., algae) that are eaten by other species (e.g., fish), and thus contribute to the homeostasis of the ecosystem.

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation: