1. Xylem is the specialized tissue of the plants that transports water and nutrients from the soil to the upper parts like stems and leaves of the plant and provides mechanical support to them. It is composed of four different types of cells. Which xylem cells help in sideways conduction of water? 2.Name the type of plant tissue that provides buoyancy

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.

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?