What is the ability to allow certain ions or chemicals into or out of a cell?

Which of the following would be a cost of drilling for oil in Antarctica? A many new jobs would be created B there would be a greater opportunity to study area wildlife C the cost of heating fuel would be increased D an oil spill could harm food

Which of the following occureduring photosynthesis

How many cells are in a single drop of blood? explain your answer.

Which of the following statements is true? A) Both prokaryotic and eukaryotic organisms can have one or more cells. B) Prokaryotic organisms are always unicellular, but eukaryotic organisms are always multicellular.

The Sabin vaccine is a liquid containing weakened polio viruses. How do the weakened viruses protect vaccinated individuals against polio because that week end virus.

Jessi consumes a diet of 1920 total kcalories that has 80 g of fat. what percent of jessi's diet comes from fat? (give answer to the appropriate reporting digit. only give the value. do not include the term percent or its abbreviation.)

Scientists break down evolution into catogories

The process of sediments being compacted and cemented to form sedimentary rocks is called A. metamorphism. B. deposition C. crystallization D. lithification

What is presumptive identification of a microorganism?

Which statement best describes the climate of a city? Select one: The average annual temperature of Austin, TX is 68.5°E San Antonio, Texas had a high temperature of 102°F today. Dallas, Texas had 8.6 centimeters of rain today.