Why is gene regulation necessary for multicellular organisms

Of the following cells, which is a prokaryote? a. oak leaf b. skin cell c. human blood cell d. bacteria

Sensory experiences that occur without a sensory stimulus are called

What does the term strain mean as it is used in genetic crosses

Which of these can determine the size of grains in igneous rocks?

What happens when an ecoystem is in equilibrium

What are the conditions required for natural selection? Check all that apply.

An aphid is an insect that has mouthparts to sip plant sap. when placed on a herbaceous stem, it soon has its mouthparts embedded and is withdrawing plant sap.

1. Which of the following is know as "the glue" that holds our Solar System and Galaxy together? A - Centripetal Force B-Gravity C - Magnetism D - Centrifugal Force

Which of the following could be considered a reliable source of scientific information? A. A scientist's presentation of experimental results at a scientific conference. B. A sales representative's glowing description of the benefits of a new drug.

Which statements describes how animals get their necessary water