Astronomers are examining stars in our galaxy and are wondering if they make a sound. The astronomers know that space is a vacuum and sound will not travel far in space, but are wondering if the stars themselves are capable of producing sound. Which two questions should the astronomers investigate to help determine if stars make a sound? 1. Are stars made of matter?

2. Does the matter inside stars collide?

3. Are stars transparent or translucent?

4. Do stars convert thermal energy into light energy?

5. Do stars reflect waves?

Which statements help to support your selections above?

6. Reflection is a property of light waves, so if stars reflect waves then they are only capable of producing light waves.

7. If stars convert thermal energy into light energy, then there won’t be any energy available to produce sound waves.

8. Collisions are one way to convert mechanical energy into sound energy, if the matter within them collides, sound waves could be produced.

9. Sound waves require matter to be transmitted, if stars are made of matter then they can transmit sound waves.

Select which combination best represents your thinking.

A.
1 and 9 & 5 and 6

B.
3 and 9 & 4 and 7

C.
1 and 9 & 2 and 8

D.
4 and 7 & 5 and 6

the pic attached shows the stages of mitosis. hope it !

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

a community that experiences major changes undergoes progress