A pure breed black guinea pig was crossed with a pure breed white guinea pig. All the F1 generation where black. Explain with diagram.

Which statement is true about the male reproductive system? The testes produce semen. a. Sperm cells are the largest component in the composition of semen. b. The scrotum functions to keep the testes at an optimum temperature. c.

New combinations of alleles may be generated in offspring by which method of reproduction? A. asexual B. budding C. sexual D. cloning

What are the primary products of the complete combustion of fossil fuels?

Why did people think that archae and bacteria are the same

What substance, produce during photosynthesis, provides food for plants and animals in a food web?

Which of the following correctly arranges the planets by the size of their diameter? A) Uranus < Neptune < Mercury < Earth B) Earth < Mercury < Neptune < Uranus C) Mercury < Earth < Saturn < Jupiter D) Jupiter < Saturn < Earth < Mercury

How does ultra radiation cause skin cancer

How many ribose molecules are found in ATP?

Would a person be squashed by extreme gravity, float with ease, freeze, burn up, or something else

According to "Life Without Gravity," why can astronauts' muscles become weak? A. Without gravity, the blood is rerouted from the legs to the head. B. Without gravity, the body "grows" by as much as several inches. C.