Frozen water (ice) has less density than liquid water.
how does this property of water affect life on earth?

1)ice floats on the surface, sustaining life at the bottom of lakes and oceans.

2)ice floats on the surface, animals migrate over lakes and bays.

3)ice floats on the surface, maintaining sub–zero temperatures at the bottom of lakes and oceans.

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 tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

idk and i also need to know where are those bio brainy acts lol