If viruses cannot make copies of themselves alone. They need to attach themselves to cells, then how can viruses make copies of themselves? Answer choices: - A compound that donates proton - attach themselves to cells - have sex with another virus - distances themselves from cell - attach themselves to viruses - it needs them - rapid expansion - By wind and rain
attach themselves to cells

If weight lifting increases strength, then what does lifting weights increase? Answer choices: - intelligence - stamina - energy - sweating - timidness - Energy. - strength - fragility
strength

Q: If cells have multiple repair mechanisms to fix damaged DNA duplication, then cells have multiple repair mechanisms to fix what? Answer choices: - a tree falling - direct damage to the lungs - that material's properties - damaged DNA duplication - an area swollen with pus - Veins and arteries. - the body's largest organ - The bending of a ray of light
A: damaged DNA duplication

Question: If arteries carry blood, then arteries in the body are able to carry what? Answer choices: - saliva - breathe - water - Air - oxygen - blood - veins - liquid
Answer: blood

*Question*
If ethologists usually study how animals behave in the animals' homes, then ethologists study how animals behave in animals'? Answer choices: - Summer - state - Birds - life - seasons - health - homes - fields
**Answer**
homes

*Question*
If glass slows the transfer of heat, then what can slow the transfer of heat? Answer choices: - engines - forces - keratin - Glass - muscles - fur - oil - sweat
**Answer**
Glass