Natural selection can cause speciation, which increases the biodiversity of an ecosystem. Several bacterial colonies are placed on a petri dish that contains agar with antibiotics. After 24 hours, ninety percent of the original bacteria die, but the remaining ten percent survive and later reproduce.
Answer:
1. based on the cell theory, which of the following is true? - the correct choice is B. All living things are made of cells
2.What will most likely happen in the absence of a vacuole?
- the correct choice is C. The cell will not store food, water, nutrients and waste.
3. Which of the following best relates the statement to the correct type of theory? the correct choice would be A. I would say that both statements are about scientific theories derived from investigation of organisms with such things as electron microscopes to be able to see cells and see them propagating so a scientific person had to study organisms to come up with the best explanation of them in a scientific theory.
4. Which of the following is true for a cell that has DNA present inside a nucleus? The correct choice would be B. it must be a eukaryote because prokaryotic DNA floats inside of it.
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Answer:
C. Steroids
Explanation:
Some lipids such as steroid hormones serve as chemical messengers between cells, tissues, and organs, and others communicate signals between biochemical systems within a single cell.
Answer:
Chemical changes cause a substance to change into an entire substance with a new chemical formula. Chemical changes are also known as chemical reactions. The “ingredients” of a reaction are called reactants, and the end results are called products.
Explanation:
