Which of the following provide chemical evidence of ice ages? A. variations in pH levels in fossils B. concentrations of compounds in rock C. variations in ratios of isotopes in fossils D. concentrations of compounds in old trees

What's the difference between transgression and marine regression

How much energy is available at the third trophic if the first trophic Level has aout 300,000 kJ available energy and the loss rate between trophic levels is 90 percent

Explain how force, motion, and energy interact with one another

Choose facts for Inner planets. (more than one answer possible) Inner planets are closest to the sun. Inner planets are mostly made of gasses. Inner planets are smaller in size as compared to Outer Planets. Inner planets have rings.

The chart below shows the three loan types of plant tissues and associated tissues. Which row (A, B, C, or D) best completes the chart above?

Ryan accidentally drops a very heavy object on his foot. In a matter of just a few seconds, he feels a tremendous amount of pain. He experienced the pain quickly because neurons rapidly carries the impulse to the brain.

What r 5 main reasons for getting a nosebleed

How does mccandless compared with the other wanderers?

If an individual inherits two of the same alleles, either both recessive or both dominant for a particular trait, the inherited genotype is what

What aspects of abundance do population density and population size measure, respectively?