If widening occurs when cell walls relax, then when cell walls relax they? Answer choices: - migrate - slows - nektar - vibrate - sweat - widen - expand - heat
widen

If poison causes harm to birds, then what causes harm to birds? Answer choices: - pesticide - poison - toxins - food - water - chemicals - life - parasites
poison

Q: If bacteria causes serious illness, then what causes serious illness? Answer choices: - oxgen - influenza - viruses - disease - chickenpox - bacteria - cooking food - contracting itchiness
A: bacteria

Question: If biomass is the total mass of living things at a trophic level, then biomass is the total mass of living things at each what? Answer choices: - trophic level - important habitats - Energy. - food and shelter - Power plants - animals - body water - heat energy
Answer: trophic level

*Question*
If vesicle transport requires energy for movement of substances against a chemical gradient, then why does vesicle transport need energy? Answer choices: - it helps plants in growing - to prevent movement - for movement of substances - during the day - Transfers energy - flow of electrons - to breath - magnetism
**Answer**
for movement of substances

*Question*
If shelter protects creatures from harmful rain, then what protects creatures from harmful rain? Answer choices: - stars - Conifers - shelter - Frogs. - clouds - moon - Frogs - the skin
**Answer**
shelter