If stress causes harm to living things, then _causes harm to living things? Answer choices: - Nematoda - organisms - stress - pesticide - nutrients - stimuli - animals - moisture
stress

If sharks have a skeleton made of tough tissue that contains a protein called collagen, then what has skeleton made of tough tissue that contains a protein called collagen? Answer choices: - mammals - rocks - animals - sharks - a fish - cows - humans - plants
sharks

Q: If cells are the basic units of the structure and function of tigers, then cells are the basic units of the structure and function of what? Answer choices: - water - mammals - ice - tigers - animals - humans - plants - the Sun
A: tigers

Question: If whistles use air to make sound, then what do whistles use to make sound? Answer choices: - Collagen - air - Energy. - power - oxygen - waves - friction - energy
Answer: oxygen

*Question*
If all biological membranes have lipids as the main consituent which consist of fatty acids, then what is the major thing that biological membranes consist of? Answer choices: - chemicals - glucose - lipids - Energy - complex - oxygen - matter - an ion
**Answer**
lipids

If if seeds stick to the fur of an mammal then that seed will be transported by the mammal, then how can mammals transport seeds? Answer choices: - mechanical - Movement - with their ears - with their teeth - with their eyes - with their fur - four limbs - circulatory systems
with their fur