Cells lining the trachea have whiplike motile extensions on their free surfaces. what are these extensions, what is their source, and what is their function?

Of the organisms (and one virus) listed below, which are composed of cells? Select all that apply. A : Euglena (a flagellate protist), Euglena gracilis B : Slime mold, Dictyostelium discoideum C : Yeast, Saccharomyces cerevisiae D : Tobacco mosaic

What happens to the membranes in the plant cells and their chloroplasts when these cells are ground up in acetone?

Which of the following 9 objects is living or nonliving: bacteria, virus, moss, you, a lemon seed, the air, bread, lettuce and rocks. Apply each of the characteristics of life to each object in order to answer the question.

Which of the following reflexes is the most rapid? a) vestibulocollic reflex b) eye blink reflex c) leg withdrawal reflex d) vestibulo-ocular reflex

In the fruit fly Drosophila, there is a dominant gene for normal wing shape and its recessive allele for dumpy wings.

Energy Distribution provides utilities, which are

What is an unintended consequence of urban growth

Why do some birds have bright colors whole others look more camouflaged?

When the M phase begins during the cell cycle, it starts with prophase metaphase telophase anaphase

What happens to a sedimentary rock after it evaporates with water? What would it turn into? A) sedimentary rock B) metamorphic rock C) igneous rock D) sediment