Answer:In old stems the epidermal layer, cortex, and primary phloem become separated from the inner tissues by thicker formations of cork. Due to the thickening cork layer these cells die because they do not receive water and nutrients. This dead layer is the rough corky bark that forms around tree trunks and other stems.
Explanation: wikipedia.
The statement that does not better protect the marine environment and organisms is disposing of all waste in a landfill. The correct answer is B.
There are differences between Eukaryotic and Prokaryotic cells. This difference is considered to be the most important distinction between groups of organisms. A Prokaryotic cell does not contain a nucleus. It only contains one chromosome and is a single-celled organism. It was the only form of life on earth for millions of years. Examples of a Prokaryotic cell are the different types of bacteria present today.
A Eukaryotic cell contains a nucleus; more than one chromosome and is typically a multi-celled organism. <span>Both plant and animal cells are eukaryotic cells.</span>
The best answer is that Genes code for proteins!
Chromosomes is where the genes are located (humans have a lot less chromosomes than genes)
Enzymes are chemical substances that participate in the creation of proteins.
RNA is another molecule which is important for making of proteins, but it is more fitting to say that the Genes are the ones coding for proteins. (RNA participates in the coding and decoding of genes)
Answer:
Change in DNA sequence leads to genetic mutation.
Explanation:
A mutation is a change in DNA. The organisms DNA can affect the way it looks in the future and can cause changes in the aspects of that organisms life. Mutation is quite crucial to evolution and is the raw material of genetic variation. The way the DNA functions can affect the mutation.