Which of these is not an example of mechanical weathering?
a. waves crashing on a seashore
b. a glacier moving down a mountainside
c. a river flowing from a mountain into a valley
d. a cave forming when limestone rock is exposed to acid

What organ systems are working to you cool down after a workout?

The diagram shows a chicken embryo and a human embryo

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.