Guard cells regulate the opening of stomata by integrating different signals, both endogenous and exogenous (environmental). The ability of plants to control stomatal opening allows them to respond quickly to changes in the environment.
<span>Meiosis reduces chromosome number so that sex cells (eggs and sperm) have a half set of chromosomes–one homolog of each pair. This is the haploid number. CONGRATULATIONS! YOU'RE SO SMART!</span>
