False. Although enzymes work as catalyst, they are not carbohydrates, they are proteins.
Answer:
D. geographic isolation.
Explanation:
As the Grand Canyon formed, it became a physical barrier to the mixing of squirrels from its northern and southern sides. Each squirrel population was confined to a single side. This type of separation is referred to as geographic isolation.
The correct answer is C. It is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools.
Explanation:
Information is considered as reliable if it is supported by evidence and the author is an expert in the field. According to this, the information about the Labrador Retriever in the encyclopedia is reliable because it is based on multiple scientific studies and articles that likely used evidence such as tests, observations, among others. Besides this, the studies were done by scientists at veterinary schools, which are considered to be experts and authorities in the field of dog breeds. Thus, this source "is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools."
In the way that a magnifier is usually used, the object is placed closest to the focal point of the lens. As a result, a virtual image is created the furthest where it can be viewed by the naked eye.