Above 38oc and below 0oc the rate of photosynthesis decreases. propose a hypothesis to explain why this occurs.

a: enzyme activity decreases at these temperatures
b: at these temperatures plants wilt
c: chlorophyll cannot absorb energy from the sun at these temperatures
d: the cytoplasm of the plant cell cannot function

In the human body fibrinogen is necessary for sealing cuts and stopping the loss of blood. since fibrinogen is made of chains of amino acids it is an example of which type of organic molecule

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Time ! for a smell to begin the process of registering in your brain, first you must a) inhale odor molecules into the nasal cavity b)transduce scent chemicals c)have a scent to inhale d)all answers can work