The layer of soil that is closest to the surface is known as the ______________ horizon. Question 7 options: a. surface b. organic c. substratum d. bedrock e. subsoil.

Which is the correct answer please? What would a biologist say is the role of nutrients in an ecosystem? A. Nutrients are substances that prevent eutrophication and oxygen loss in lakes B. Nutrients are elements that are permanently destroyed when organisms decompose C. Nutrients are carbohydrates that fuel photosynthesis for primary producers D. Nutrients are elements from which organisms construct the molecules of life.

1. Outline the steps of an experiment to prove that photosynthesis occurs with both light dependent and light independent phases. What are the materials needed and what is the expected outcome? Include a diagram to support your answer.

The datum point is a point within the archaeological site that serves as reference to locate the vertical position of all of the archaeological materials collected in the archaeological site.   Question 20 options:   A) True   B) False

Contrast is the extent to which detail in an image is preserved during the magnifyingprocess. is the amount that an object's image is enlarged. is the degree to which image details stand out against their background. focuses radiation emanating from an object to produce an image. Question 6 (1 point) The maximum useful magnification for a light microscope is about 100X 1000X 10,000x 100,000X Question 7 (1 point) The two image-forming lenses of a compound light microscope are the condenser and the objective the condenser and the ocular the objective and the ocular none of these.

Ocean acidification impacts __________________________. a. fishes b. marine ecosystems c. organisms with a calcium shell d. all ecosystems

During the ____________________ phase of microbial population growth, the rate of cell division begins to slow down or division stops entirely.   a. stationary b. lag c. death d. exponental growth

If a person wanted to to prevent erosion on a slope of their property, they should plant tall trees with deep tap roots on it.     Question 9 options:   True   False