Consider a plant that grows best in bright sunlight in which seed germination is controlled by phytochromes. Which of the following statements describe(s) the structure and function of phytochromes in this plant? Select all that apply View Available Hint(s) The effects of red and far-red light on phytochromes are irreversible. Phytochromes absorb red light and far-red light equally when the phytochrome is in the Pir configuration. The plant seeds are more likely to germinate after exposure to red light than after exposure to far-red light Phytochromes contain photoreceptors When a phytochrome in the Pfr configuration absorbs far-red light, the phytochrome reverts to the Pr configuration. Far-red light stimulates the plant seeds to germinate when the phytochrome is in the Pfr configuration Phytochromes absorb red light maximally when the phytochrome is in the Pr configuration Submit

Which of the following is a cost of urbanization? a-cities can provide a high standard of living. b-cities are hubs of entertainment and education. c-paving over land changes the environment. d-job opportunities are greater in urban centers.

The diagram below represents a marine food web and a process that can harm the human population. each circle represents an organism and the smaller dots inside them represent a toxic substance. what is being represented and how does it harm the population? the diagram represents biological half-life, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents biomagnification, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents the process by which different organisms prey upon each other; this can impact the human population by reducing the number of organisms that do not contain the toxin. the diagram represents the way that toxins are metabolized by living organisms, with those at greater trophic levels able to metabolize more efficiently than those at lower levels. this means that those at higher tropic levels are safer for humans to consume compared to the organisms at lower trophic levels.

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?