Answer:
Genetic variation among plant populations often occurs along different climatic gradients, such as temperature and precipitation gradients.
Environmental factors are often responsible for the patterns of genetic structure observed at small spatial scales (Sacks, Brown, & Ernest, 2004).
Answer:
My instagram is _rubenboii
Explanation:
Lightweight beaks, heavy teeth, stability in flight
The purpose of MHC molecules is to bind and display pathogen-derived peptide fragments on the cell surface so that the relevant T lymphocytes can recognise them.
<h3>What are MHC proteins, or major histocompatibility complex proteins?</h3>
MHC, or the major histocompatibility complex, is a set of genes that produce proteins located on the cell surfaces and that aid the immune system in identifying foreign objects. In all higher vertebrates, MHC proteins are present. The complex in humans is also known as the HLA (human leukocyte antigen) system.
<h3>What exactly are MHC proteins, and why are they crucial?</h3>
The major histocompatibility complex (MHC) is a collection of genes that code for cell surface proteins that play a significant part in the immune response. MHC molecules have a major role in how they display antigens.
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Answer:
<em>The option D) 'Every cell has a nucleus that contains genetic material' is not a part of the cell theory.</em>
Explanation:
The cell theory has three main postulates which are:
- All living things are made up of a cell or different cells.
- All cells arise from pre-existing cells
- Cells are the basic unit of life.
The cell theory does not claim that every cell shall have a nucleus. The prokaryotes lack a nucleus yet still are living things. However, all cells will have genetic material in the form of DNA or RNA.
