Write an essay about the possibility of mass extinction. 3-4 paragraphs including a comparison of extinction rates in the past and extinction rates now, causes of extinction, and what changes need to be made for exinction to not occurr, and
what will happen things continue as they are?

Nucleic acid certain protein cell membranes certain carbohydrates

Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.

How can fertilizer use be detrimental to the environment? a. it can enter waterways, causing them to accumulate an excess of nutrients. b. high levels of fertilizer in bodies of water can lead to excess algal growth. c. fertilizer can lead to oxygen depletion, and be harmful to organisms in waterways. d. all of the above select the best answer from the choices provided a b c d