Which two important factors affect cell differentiation? A. Environmental influences and cytoplasmic determinants B. Sperm binding and acrosome reaction C. Sperm binding and cortical reaction

Hot coffee in a mug over time and the mug warms up. Which describes the energy in this system

Hormone receptor complex binds to DNA. 2. Messenger RNA directs synthesis of specific proteins. 3. Hormone binds to receptors in the nucleus (sometimes in the cytoplasm). 4. Messenger RNA synthesis is activated. 5.

What is true about scientific knowledge? A. It isn't based on observation B. It changes as new evidence is found C. It is agreed upon by all scientists D. It is rarely proven wrong. Is it D?

A researcher notices a decline in organism and population numbers over several years in a stream environment. What human activity may have affected organisms and populations in this way?

What is phosphorus found in?

These are organisms that are brought into a new environment, sometimes accidentally, sometimes on purpose; and have no natural enemies or controls.

You decide that the introduction should also discuss the extremophiles that are referred to as the archaea.

Banff and Minsk are located at similar latitudes. What could account for Banff's average yearly temperature being lower than Minsk's?

What you think can be done to reduce levels of carbon dioxide in the atmosphere

Alzheimer's and Parkinson's are both diseases affecting the central nervous system and they share some similar characteristics.