In which of the following periods of the Paleozoic Era did the first vascular plants appear on land?

A. Silurian

B. Permian

C. Cambrian

D. Ordovician

Darker skin produces more what than lighter skin

Plants that might be called "weeds" are often great pioneer species. What characteristics do they possess that would make them a successful pioneer species?

Describe the life cycle of a horse

The nurse is preparing to delegate a bath for a 90-year-old client who is nonresponsive and has mild skin breakdown. which type of bath will the nurse delegate to the unlicensed assistive personnel (uap) ?

Christie's doctor recommends that she eat 40 grams of protein a day. She's already consumed 50% of her protein recommendation for the day. How many servings of the given snack should Christie have to meet her daily protein recommendation?

What is the energy released during respiration used for?

How does the precision of measurements affect the precision of scientific calculations?

What are gametes??

The main job of erythrocytes, or red blood cells, is to transport what to supply to cells?

Bacteriophage viruses have which of the following macromolecules? DNA and lipid DNA and RNA DNA and sugars DNA and protein