18) the susquehanna river, which runs through the states of new york, pennsylvania, and maryland,
received the title of --america's most endangered river - in 2005. one of the river problems
results from the large number of sewage overflow sites that are found along the course of the river.
these sewage overflow sites are a direct result of an increase in human population. what effect de
you predict this will have on the biodiversity on the river ecosystem?
a. the biodiversity will decrease due to an increase in pollution
b. the biodiversity of the river ecosystem will decrease due to climate change.
c. the biodiversity of the river ecosystem will increase due to an increase in fertilizer
d. there will be no change in biodiversity of the ecosystem because the sewage will run into the
ocean

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.)chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.

What is the statement plant growth is affected by the color light