Answer:
b. Aquifer
Explanation:
An aquifer is a body of saturated rock through which water can move quickly. An aquifer must be both penetrable and porous. It includes such rock types as sandstone, conglomerate, fractured limestone, and unconsolidated gravel and sand. Fractured volcanic rocks, such as columnar basalts, can also make suitable aquifers. The rubble zones between volcanic flows are generally both porous and permeable and make excellent aquifers. Rocks such as granite and schist are generally poor aquifers because they have very low porosity.
Answer:
1. Signaling molecule
2. Signaling receptors
Explanation:
Hormones, growth factors, neurotransmitters, etc. serve the function of signaling molecules for cells. These molecules are released by one cell and bind to the receptors present on/in the target cells to elicit the desired response. Thereby, the signaling molecules serve in cell-cell communication.
For example, insulin hormone synthesized and released from beta cells of pancreas binds to its cell surface receptors present on the surfaces of liver cells and muscle cells to stimulate the uptake of the glucose from the blood.
Likewise, neurotransmitters released from the presynaptic neuron bind to receptors present on the membrane of postsynaptic neuron and serve to carry the nerve impulse to the postsynaptic neuron.
Marrying a first cousin might be a bad idea because a recessive trait that runs in the family may appear in the offspring of the union.
<h3>What are recessive traits?</h3>
Recessive traits are traits which do not always appear in every generation except in the absence of the gene for the dominant trait.
Marrying a first cousin might be a bad idea because a recessive trait that runs in the family may appear in the offspring of the union.
In conclusion, recessive traits are might appear on.tg offspring of related individuals.
Learn more about recessive traits at: brainly.com/question/800811
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