Explain why an ecological pyramid can be used to illustrate energy flow from one trophic level to the next in an ecosystem.

What is the golden standard for scientific research?

The occurrence of withdrawal symptoms signals that the body has adjusted to the presence of the drug. indicates that substance abuse has developed. is seen when use of any psychoactive substance is terminated.

What is the function on mitochondria in cells? A:Storing Water B:Forming Lipids C:Packaging Proteins D:Producing energy

The largest reservoir of phosphorus in most ecosystems is

Raj made the timeline below to show the progression of thinkers who developed theories about the earth's place in the universe.

Compared with normal hemoglobin, the hemoglobin of a person with sickle cell disease a. is longer. b. is shorter. c. has a different sequence of amino acids. d. is sickle-shaped. e. has the same sequence of amino acids.

If a white dwarf in a binary star pair is accreting mass and it exceeds the 1.4MSun limit, it will: Turn into a Neutron Star Turn into a Black Hole Turn into a Main Sequence star. Explode

A scientist is investigating mutations. She observes a mutation where one or more nucleotides are inserted into a sequence of DNA. The scientist claims that this insertion mutation will affect genetic variability.

Which type of gene is most likely to be widely expressed in the body of someone who has a superficial scrape?

Which of the answer choices is an example of stabilizing selection? 1. decrease in the number of birds with intermediate-sized beaks 2. who are unable to eat large or small seeds 3. breeding dogs from wolves selection for average 4.