Viruses are so small that they can be seen only with an electron microscope, and objects to be viewed are illuminated by electrons in an electron microscope. Given these facts, what of the following can only be viewed by illuminating electrons? among the following options: - insects - small animals - eyelashes - Light - an image - fungi - viruses - an object
viruses

(Question)
Fish have a circulatory system with a two-chambered heart, and each side of the heart is divided up into two chambers. Given these facts, ish have a circulatory system with what among the following options: - our nearest star - divided heart - solid, liquid, gas - Veins and arteries. - kinetic energy - flow of electrons - reducing acid rain - matter vibrating
(Answer)
divided heart

Ques: Evolution occurs by a process called natural selection, and evolution is a sequence of variation and selection. Given these facts, what produces variation among the following options: - animals - evolution - pollen - environment - a doorbell - movement - seasons - competition
Ans: evolution

(Q).
Scales are used for protection by scaled animals, and fish are covered with scales. Given these facts, what are covered with protection among the following options: - apples - trees - coral - clams - roses - wings - hats - fish
(A).
fish

Ques:Smell is used for finding food by some animals, and another of our five major senses is the sense of smell. Given these facts, animals use five major what to locate food among the following options: - foraging areas - messengers - continents - Collagen - hormones - senses. - arteries - sound

Ans:senses.

The color of leaves on deciduous trees usually changes in the autumn season, and leaves change color, snow falls, and spring brings back the greenery. Given these facts, what season happens before snow falls, and spring brings back the greenery among the following options: - autumn - rainfall - Winter - H20 - spring - rain - middle - summer
autumn