Calcite and aragonite minerals that constitute clam shells are examples of which method of mineral formation?

Me with biology endocrine system crossword also image left i need with hw

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.