Bryophytes, ferns, and fern allies all require for sexual reproduction because the sperm cells ) dry conditions; must be dry before they fertilize egg cellsb) pollinators; depend on animals for distributionc) surface water; swim to the egg celld) wind currents; depend on wind for gamete distributione) none of these choices are correct.

option C

Bryophtes, ferns and ferns allies require surface water to swim to the egg cell.

Explanation:

Bryophytes are Nonflowering and seed producing group of plants. They are found in moist habitats and are small. Bryophtes consist of ferns, mossess, liverworts and hornworts. In the gametophyte life cycle which is responsible for producing gametes for sexual reproduction, the flagellated sperm is produce in the antheridia through meiosis.and the non motile egg is produced in the structure called archegonia through meiosis. The flagellated sperm swim in the water to non motile egg to fertile the egg and produce a zygote. This zygote into a sporophyte.

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.

i think the answer is a.keratin is the pigment responsible for skin color.