You are presented with the question "What do the simplest of green plants have?" and the following answer choices: - varied life cycles - spinal cords - backbones - Chemical energy - absorb light energy - Chlorophyll - lungs - photosynthesis Now knowing that algae have varied life cycles and algae Algae Green algae are the simplest of green plants, choose the best answer.
varied life cycles
(Question)
You are presented with the question "To make very small objects appear bigger, one can use what instead of light for illumination?" and the following answer choices: - electricity - electron beam - by indirect light - reflecting light - photons - Electrical energy - heat energy - mirrors Now knowing that an electron microscope is used for seeing very small objects by making them appear bigger and electron microscopes use a beam of electrons as their source of illumination, choose the best answer.
(Answer)
electron beam
Ques: You are presented with the question "what can cause harm to the eyes?" and the following answer choices: - hypothyroidism - acetic acid - juice - water - Pesticides - heating liquids - light - rays or beams Now knowing that vinegar can cause harm to the eyes and it is this bacteria which turns alcohol into acetic acid, the main component of vinegar, choose the best answer.
Ans: acetic acid
(Q).
You are presented with the question "What keeps a fire burning?" and the following answer choices: - energy - heat - Covering it with dirt - sun's heat - Removing fuel - power - fanning - Dousing it with water Now knowing that fanning a fire increases the oxygen near the fire and fire needs oxygen to continue burning, choose the best answer.
(A).
fanning
Ques:You are presented with the question "What can be used for heating a building by a heating system?" and the following answer choices: - the Sun's rays - peachleaf willow - engines - oxygen - photosynthesis - photons - air - hydrogen and oxygen Now knowing that energy is used for heating a building by a heating system and solar energy is the energy in the sun's rays, choose the best answer.

Ans:the Sun's rays
You are presented with the question "Which tree's leaves change color in autumn" and the following answer choices: - Fir - wind - Palm - blue - elms - Oak - Ficus - Aves Now knowing that the color of leaves on deciduous trees usually changes in the autumn season and common deciduous trees are the oak, elm and beech, choose the best answer.
Oak