What are constants in an experiment

Which of the following cannot undergo sexual reproduction? A) birds B) prokaryotes C) eukaryotes D) none of the above

Which of the following is an example of kinetic energy A. a girl running in a race B. a tank containing gasoline C. a car sitting motionless D. a sled sitting at the top of a hill

Why do scientists use models to explain atomic structure?

Which of the following organ systems is involved in the uptake and transport of materials required for life-sustaining processes?

The presence of DNA is important for cellular metabolic activities because DNA A. Directs the production of enzymes B. Is a structural component of cell walls C. Directly increases the solubility of nutrients D. Is the major component of cytoplasm

What areas of them body are involved in the lymphatic system

A patient with a suspected with a tumor in her left ovary. Cell samples were taken from her ovaries. A biopsy was conducted. Which of these might be the root cause of the cancer? a.

I know antibodies clump the antigens but when does that happen? are they produced before the phagocytes engulf the pathogen, after or during?

Where predation pressure is high, we generally find group composition to be a. one male harem b. a monogamous pair c. multimale/multifemale d. solitary

What would happen if your backbone and spinal cord was injured at your waist