A forest fire destroys trees in a large area. The forest rangers use the burned area to study the effect of different types of grasses on soil erosion. They
choose ten plots of ground that are the same size. Each of these plots receives
the same amount of sun. Each of these plots also has the same kind of soil and
the same slope. The rangers plant each with a different type of grass.
Measurements of soil erosion are made every week for the entire
summer. What hypothesis is being tested in this study?
If areas are burned over, then they will have greater erosion than forested areas.
If the slope of the land is changed, then soil erosion is affected.
Certain types of grass have a greater effect on reducing soil erosion than others.
O If grass is planted, then the amount of soil erosion will be reduced.

Complete the sentences by matching the names of trees to the appropriate blanks. to do this, drag the names on the left into the appropriate blanks in the sentences on the right. match the words in the left column to the appropriate blanks in the sentences on the right. terms may be used more than once. make certain you have filled every blank with a term before clicking submit. 1. deciduous trees lose their leaves seasonally and include trees such as maple and elm. 2. conifer leaves are generally thin and needle-like, while seeds are contained in cones. conifers include cedar and pine. 3. evergreens are plants that maintain their leaves in all seasons and include trees such as cedar, elm, and pine. 4. hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as maple, , and cedar. elm returned you filled in 2 of 10 blanks incorrectly. mango trees are tropical broad leaf plants that maintain their leaves all year long. no credit lost. try again.

Differentiation of cells changes the nucleic information. true false

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.