A dichotomouys key is used to identify a plant. 1a. Leaves are spiny Pinus taeda 1b. Leaves are broad Go to 2 2a. Single leafGo to 3 2b. Many leaves Go to 4 3a. Leaf edge is smoothCornus florida 3b. Lead edge is roughUlmus americana 4a. Leaflet edges are smoothAlbizia julibrissin 4b. Leaflet edges are roughJuglans nigra A plant has many broad leaves with rough edges. What type of plant is this? (1 point) albizia julibrissin
pinus taeda
cornus florida
juglans nigra

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

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.

Aresident is five feet tall.what is the measurements in iches