Egg laying land animals have evolved worries eggs with tough Shelton sure that A. External fertilization getting please
B. The egg and the sperm can fuse
C. Parental care is a necessary
D. The developing embryo does not dry out

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

What is a metal replacement reaction