Which gas in Earth's atmosphere has increased over time due to burning fossil fuels

A. Oxygen

B. Nitrogen

C. Water vapor

D. Carbon dioxide

Cells use sugars to produce energy through several different processes. Which process would provide the most energy for cell functions? a. Glycolysis b. aerobic respiration c. aerobic fermentation d. anaerobic fermentation

Male cones produce what, which contains cells that develop into sperm

Some frogs, when sitting, can absorb all the oxygen they need through the skin. Only when they move do they start to breathe. Explain these observations.

Which type of cell has the potential to develop into any type of cell

When water reaches an arctic region, it sinks because it becomes A. less dense as it gets colder and saltier. B. more dense as it gets colder and saltier. C. less dense as it gets colder and less salty. D. more dense as it gets colder and less salty.

Which did a large earthquake in Alaska initally cause? which did a large earthquake in Alaska initally cause? A. a volcanic eruption B. flooding C. a landslide D. a tornado

What type of asteroid/meteorite do they believe brought some water to the Earth? a. Stoney Iron b. Iron c. Steel d. Carbonaceous Chondrite

If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis? and can u explain because i dont understand

A lab technician runs the results of a simple PCR reaction through a gel electrophoresis to test a sample of imported hamburger meat for the presence of a DNA sequence that is known to be found in kangaroos and not in cows.

If Earth was not titted on its axis, what changes would you expect to see in the seasons?