You are presented with the question "a greenhouse is used to protect plants by doing what?" and the following answer choices: - reduced heat - colder and wetter - storing lawnmowers - holding plant pots - retaining heat - In the winter - food and shelter - starting fires Now knowing that agreenhouse is used to protect plants by keeping them warm and retains heat in cold weather, reflects exterior heat in warm weather, choose the best answer.
retaining heat
(Question)
You are presented with the question "what happens when muscular walls of blood vessels contract?" and the following answer choices: - digestion - weathering - blood pressure rises - Dehydration - recovery time from fatigue - rapid expansion - major threat to health - respiration Now knowing that constriction occurs when the muscular walls of blood vessels contract and constriction raises blood pressure, choose the best answer.
(Answer)
blood pressure rises
Ques: You are presented with the question "what might leave an environment to find food and water if those things decrease?" and the following answer choices: - bears - humans - pigeons - Lobsters - grass - clouds - h2o - omnivores Now knowing that if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water and all humans are animals, choose the best answer.
Ans: humans
(Q).
You are presented with the question "How does a guitar create sound?" and the following answer choices: - electrically - mechanical - Amplifying it with electricity - The musician being trained - Tuning it properly - Plucking a string - Through play - lowered energy cost Now knowing that plucking a string can cause that string to vibrate and all guitars produce sound through the mechanical vibration of strings, choose the best answer.
(A).
Plucking a string
Ques:You are presented with the question "Arthropods with what may live in large colonies and have complex social behaviors." and the following answer choices: - fur - gills - animals - complex - Wasps - vertebrae - Flowers - wings Now knowing that insects may live in large colonies and have complex social behaviors and insects are the only arthropod to have wings, choose the best answer.

Ans:wings
Ques:You are presented with the question "What can soil have a positive impact on?" and the following answer choices: - nutrients - organic molecules - consumers - healing of wounds - water conservation - important habitats - watershed - Most plants Now knowing that zinc has a positive impact on the healing of wounds and sources of zinc are soil, zinc oxide, zinc sulfate, zinc chelate, choose the best answer.

Ans:
healing of wounds