Which step happens first in translation?
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a. a trna molecule attaches to a codon.
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b. the amino acid pulls apart from trna.
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c. the amino acids form peptide bonds.
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d. the ribosome reaches the start codon.

A. A tRNA molecule attaches to a codon.

Explanation:

The first step of translation is that a tRNA molecule attaches to a codon. These tRNAs (transfer RNAs) bring the amino acids to the ribosome - rRNA complex, where they connect to the codons and are arranged into a full protein.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.