The main function of the large intestine is to
A. supply enzymes for digestion.
B. remove water.
C. absorb nutrients.
D. produce vitamins.
B. remove water.
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A botanist is studying the growth rings of a redwood tree. She notices that three concentric rings are very thin compared to the surrounding growth rings. What can she deduce from the occurrence of these thin growth rings?
A. The tree developed more apical shoot meristems during that time period. B. The tree may have experienced a drought or had limited access to nutrients during that time period. C. The tree developed more secondary xylem during that time period. D. The tree had ample access to water and other resources during that time period.
The developing embryo implants into the uterine lining at about five days after fertilization. At this stage, it is a fluid-filled ball of cells called a ____
Fill in the blank with the appropriate word.
Potable water must be ________.
A. free of all elements B. free of pathogens C. sterile D. absolutely clear
What organelle and function pair best explains their ability to divide?
A. chloroplasts and peroxisomes, because they both have their own DNA B. peroxisomes and lysosomes are both derived from engulfed bacteria C. ribosomes and mitochondria, as each is a result of regression theory D. mitochondria and chloroplasts, due to their association with endosymbiosis theory