Plants could not live if they were unable to get water and nutrients from soil. In some places, especially deserts, these resource are in short supply so plants must compete with each other for them. Which of the following is an actual strategy used by plants to keep competitors from being a problem? A) Having very spiky parts above ground

B) Releasing ‘plant poisons’ (herbicides) from their roots into the soil

A is your answer.

Explanation:

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the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.