Why are conifers so common in American forests? They are a very hardy type of tree.
They don't grow well in cold weather,
There are more conifers than other types of trees.
All of the above

Answer is C

Explanation:

Coniferous forests grow in a wide range of climates, from the coldest polar regions to the warmest tropical regions and everything in between. The reason they're so prevalent worldwide is because they take advantage of certain environmental conditions that other trees aren't able to live in as well. Conifer trees are adapted for cold and harsh climates. ... The needle-like leaves are an important adaptation to Conifer trees because they do not accumulate much snow, keeping the weight load mild. Even though Tamarack trees lose their leaves in the winter, they are still subject to some snowfall.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

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.