Speciation is the process by which new species are formed. Which of the following circumstances is most likely to lead to speciation?

14. Within a single use of the scientific method, which of the following steps can only be performed after data is collected? A. Controls and variables are chosen. B. The initial experiment is designed. C. The initial hypothesis is formed. D.

What is the process by which a trait present in an ancestral organism is modified by natural selection over time in descendants of that ancestor?

Cell division is triggered when cells reach a certain size because

An observational field study allows scientists to gain information about how things occur in behavior or in nature.

I need 3 different food chains for a forest including 5 animals per chain

What is the ploidy of this cell model? A circle containing six blue lines. Each line is a different length. What is the ploidy of this cell model? A circle containing six blue lines. Each line is a different length.

Carbohydrates may form larger carbon-based macromolecules by combining with which elements? A. sodium, potassium, nitrogen B. nitrogen, sulfur, phosphorus C. potassium, sodium, sulfur D. silicon, phosphorus, sodium

This is a characteristic of minerals. It describes the mineral's resistance to fractures or scratches.

Neural signals from the spinal cord are transmitted to your stomach muscles by the

Which characteristic describes all organisms in the domain Eukarya? A. Their cells contain a nucleus B. Their cell nuclei lack DNA C. Their cell are prokaryotic D. Their cell wall contain peptidoglycan