What characteristic is shared by birds, salamanders, and sharks?

The four structures unique to plant cell

Which of the following is a result of meiosis? a. skin cells b. bone cells c. blood cells d. brain cells e. egg cells

The Greeks assigned what magnitude to the brightest star seen the night sky? 1

Microbes, like bacteria, can only survive in a certain environment. Describe the factors that ideal environment for a microbe must have

Which systemâs main purpose is to allow organisms to create more organisms?

Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids. how many different types of amino acids are used to construct proteins?

What is a change analysis survey?

The function of a chromosome is to A. provide structural support. B. transport cellular wastes. C. produce cellular energy. D. store genetic material. Which of the following is true about genes? A.

Minerals that do not have weak bonds along specific planes will A. streak B. luster C. cleave D. fracture

In industrialized nations, childhood diseases have declined dramatically during the past half-century, largely as a result of