Which of the following correctly describes crossing over

Another name for unicellular organisms that dominated Earth up to the Precambrian time is A. cyanobacteria. B. stromatolites. C. eukaryotes. D. prokaryotes.

The largest mass extinction event in the history the Earth occurred at the end of the ___ period. A. Cambrian B. Ordovician C. Devonian D. Permian

Sugar changes into energy in a. golgi bodies b. mitochondria c. nucleus d. nucleolus

What is the best description of a plant meristem

A client in need of a lung transplant tells the nurse, "I will not take the organ of any person belonging to a different religion." The nurse initiates the process for resolving the ethical dilemma by collaborating with other healthcare team members.

Which organisms are prokaryotes a. Archaea b. Fungi c. Protist d. Plants

A population of lizards that originally had no predators lived on a small isolated island. Predators of the lizards were accidently introduced to the island from a visiting ship.

If there are 50 kcal of energy in the tertiary consumer trophic level, how many kcal would you expect to find in the primary consumer level

The plasma membranes of some plant cells use transport proteins to move protons out of the cell against their concentration gradient (from areas of low proton concentration to areas of high proton concentration). this is an example of:

What is algae? and where is come from?