First Plasmid is a chromosomal element often a circular DNA.
The uptake of a plasmid from the environment is NOT a common event reason being, bacteria naturally take up DNA from their environment in a process called transformation. Thus if a bacterium takes up a piece of DNA that cannot be maintained in a cell then that cell will not survive.
The answer is number 4 hope this helps
B because a and c are incorrect and in letter d it states earth has no protection at all. And it DOES have protection B is most definitely true
Answer and Explanation:
When talking about heart diseases, there are numerous factors that may aggraviate or increase the risk for heart disease, such as lifestyle choices including diet, drug consumption, smoking, etc.
- <u>High blood cholesterol levels</u> - consuming food high in cholesterol leads to the congregation of extra cholesterol in the the arteries.
<u>Solutions</u>: reduce the consumption of food that is high in cholesterol, such as eggs, cheese, and meat (especially red meat).
- <u>Low physical activity</u> - increases the probabilities of having obesity and high cholesterol, which could lead to heart disease.
<u>Solutions</u>: practice exercise often, e.g. a walk in the park every evening, going to the gym, running, swimming, etc.
- <u>Smoking</u> - this increases the probability of having a heart disease as it damages both the heart and blood vessels.
<u>Solutions</u>: avoid smoking at all costs.
Answer:
Empirical evidence of his ideas
Explanation:
The scientific process involves the formulation of hypotheses that enable to answer questions about the real world, and then to carry out experiments or observations that are used to confirm (or reject) such predictions. In the last 160 years, Darwin's ideas on 'descent with modification' have constantly been subjected to experimental assessment, and obtained data confirmed his observations. For example, molecular evidence based on the DNA and RNA -which constitute the genetic material of all living organisms- has shown the conservation of this process. In consequence, molecular evidence has been used to construct 'evolutionary' phylogenetic trees from DNA/RNA sequences. Moreover, evidence in genetics has shown the critical role played by mutations in the mechanism of natural selection proposed by Darwin, thus also confirming his theories. These are only some examples, and supporting evidence confirming Darwin's ideas has been collected from different research fields ranging from ecology to molecular biology.
