Which row of the table below correctly describes the role of cellulose, proteins and water in living organisms?
cellulose
proteins
water
D
solvent
enzymes & antibodies
for chemical reactions
B
strengthens cell walls
to make fats & oils
solvent
с
strengthens cell walls
enzymes & antibodies
solvent
D
solvent
enzymes & antibodies
strengthens cell walls

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?