If brain atrophy is caused by lack of oxygen, then what causes brain atrophy? Answer choices: - Smoking - sodium - Dehydration - sweating - death - birth - Veins and arteries. - lack of oxygen
lack of oxygen

If some plants store water after absorbing it with the roots, then some plants store water after absorbing it with what? Answer choices: - the petals - Roundworms - energy - the roots - Roundworms. - the succulents - fibrous - the arms
the roots

Q: If mollusks are animals who lack a backbone or spinal column, then what does an animal like a mollusk lack that many other animals have? Answer choices: - sensory neurons - Energy. - Bodily water - kinetic energy - alveoli - the skin - an organism's body - spinal column
A: spinal column

Question: If high winds can lead to destruction of aquatic habitats, then which normal weather event can threaten aquatic habitats? Answer choices: - wind - oil - cold - Winter - hail - snow - fire - sleet
Answer: wind

*Question*
If producers use energy and inorganic molecules for the retention of nutrients, then producers use energy and inorganic molecules for what? Answer choices: - neutralizing threats - dismissal of nutrients - heat produced - Transfers energy - retention of nutrients - decomposition - agriculture - iron in water
**Answer**
retention of nutrients

(Q).
If greenhouse gas concentrations in the air have increased over the last decade dramatically, then what have increased over the last decade dramatically? Answer choices: - gasoline concentrations - Warm air moving into cold air - Greenhouse gases - treehouse gas concentrations - movements in the earth's crust - concentrated orange juices - genetic diversity - greenhouse gas concentrations
(A).
greenhouse gas concentrations