If bones are kept healthy by exercise, then what are bones kept healthy by? Answer choices: - exercise - food - animals - nutrients - reduced heat - Cooking - Proteins - cells
exercise

If all liquids cause refraction of light, then what causes the refraction of light? Answer choices: - focusing a lens - Chemical energy - fossil fuels - all liquids - a solute - chemical changes - an electron lens - squids
all liquids

Q: If killer whales use saturated fatty acids to store energy, then what uses saturated fatty acids to store energy? Answer choices: - the Sun - peachleaf willow - Conifers - killer whales - perennials - generators - passenger pigeons - light bulbs
A: killer whales

Question: If animals and humans need to eat plants to survive, then animals and humans need to eat plants to what? Answer choices: - get pregnant - survive - be happy - health - energy - reproduce - be productive - Energy.
Answer: survive

*Question*
If ginkgo biloba sheds their leaves seasonally each year, then what does ginkgo biloba do every year? Answer choices: - Sheds their leaves - it keeps an organism warm - move to different locations - mate with females - produce offspring - reproduce - spread flower seeds - Move to another area
**Answer**
Sheds their leaves

Q: If harming an animal species has a negative impact on the number of individuals in that species, then harming an animal species has a negative impact on what? Answer choices: - The size of the individuals - global ecosystems - The food of the species - most organisms - The number of individuals - living things - The color of the species - Abnormal cell growth
A: The number of individuals