Answer:
a. The substance is from an animal source.
Explanation:
Glycogen is a carbohydrate polymer in which animals store their excess glucose as. When animals digest their ingested food, it gets broken down into GLUCOSE. This glucose, when in excess, gets stored as GLYCOGEN.
According to this question, a substance found at a crime scene is being examined using chemical tests. The test revealed that glycogen is present in the substance. This can mean that the substance is from an ANIMAL source because GLYCOGEN is only present in animals.
<u>Answer</u>: c. a and b
Trees play vital roles in the production of oxygen as well as the fixation of carbon from 
. As trees use nitrogen, phosphorus and water as nutrients for growth, their diminishing numbers would change the balance between these three elements significantly.
Thus, during rains, the water level will rise much faster and higher in the absence of trees. These could possibly lead to increasing cases of devastating landslides.
A. increased demand for natural resources; need to create environmental laws to protect natural resources for human consumption; need to develop air quality control systems for big business; need to ensure proper disposal of human waste
Sexual reproduction would create the most diversity among a population
