What is the structure used in reproduction in pteridophytes?

what is the structure used in reproduction in gymnsperms?

Summarize variations in climate among three major zones as you travel south from the equator toward the South Pole?

Waves break on a beach due to: 1 turbulence near the shoreline 2 reducing depth of water near beach 3 increasing wavelength near beach

Proteins are broken down to form ammonia, which is toxic to cells. In which organ of the body is this ammonia converted to the less toxic compound urea?

Cellulose and starch are examples of: monosaccharides disaccharides lipids polysaccharides

What was the history of life on earth recorded in?

13. What is an example of a carbohydrate?

Heart disease is the leading cause of death among both men and women in the United States. It is usually caused when a sticky substance called plaque builds up in the arteries. Often, the only symptoms of heart disease are chest pain or discomfort.

Is the following sentence true or false? Weather is the average condition of the atmosphere in a particular place over a period of many years

How many cells make up a unicellular organism? one two three more than three

The cell membrane has many proteins embedded in it. These proteins have many different functions ranging from transport of materials to cell surface identity markers. True False