Some strains of insects have become resistant to ddt.

a. True

b. False

In the food chain below, which is the producer? flower - mouse - snake - hawk

Describe what it means for a field of study to be considered a science

Which source is considered primary source of scientific information Original

One of the most abundant elements in the human body is also a component of all organic compounds the name of this element is blank hydrogen carbon nitrogen oxygen

Which of the following statements about the cell membrane is FALSE? Select all that apply. A. The cell membrane is mainly composed of phospholipids and proteins. B. All materials can pass freely back and forth across the membrane. C.

How do cells become specialized for different functions?

Organisms do not adapt as a result of competition for resources. true or false

How do most cancers arise? question 1 choices choice a., from a single mutations arising simultaneously in a cluster of cells choice b., from a series of mutations that arise in the descendants of a single somatic cell choice c.

Briefly describe your experimental design for the first experiment. Make sure to include: a. The conditions you used to feed your mice (e. g., the foods you fed your mouse and the length of time the mouse was in the light box) b.

What caused the earth to develop layers as it cooled?