True
Explanation:
Aqueducts are constructed channels for transporting water from one point to another.
- They were first constructed by the Roman to move water from hollow valleys and narrow areas.
- Today, aqueducts include canals, ditches, gutters, channels that are used to carry water.
- Aqueducts aids the movement of water from one place to another.
- Development of aqueducts by the Romans was seen as a great advantage in that civilization.
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Answer:
Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell to another. To receive and respond to a chemical signal, a cell must have a <u><em>receptor</em></u> for that chemical.
Explanation:
To generate a physiological response, all cells in the body have special proteins called receptors. These receptors are involved in detecting a chemical signal and generating a response. The receptors are specific for different kind of chemical signals. For example, a dopamine receptor will bind a dopamine molecule whereas an insulin receptor will be able to bind an insulin molecule. Apart from chemical signals, some cells might also respond to mechanical signals.
I don’t understand the question but here is what I understood:
DNA replication is for Both
Genetic Sameness is Asexual Reproduction
Genetic Variation is Sexual Reproduction
Meiosis is Sexual Reproduction
Mitosis is Asexual Reproduction
Nuclear division is both
Produces gametes is sexual reproduction.
I hope I answered your question properly. :)
