Base your answers to the next three questions on the diagram below, which represents the human digestive system
Required
1
HS-LS1-7Â
Required
1
HS-LS1-2Â
Question 8
8.
Which substance is an inorganic molecule?
water
starch
fat
DNA
Which group contains only molecules that are each assembled from smaller organic compounds?
proteins, DNA, fats, starch
proteins, carbon dioxide, DNA, starch
proteins, water, DNA, fats
proteins, starch, carbon dioxide, water
Cellulose is the chemical name for the fiber found in fruits and vegetables. Cellulose is similar in structure to starch. It is most likely that humans can digest starch but not cellulose because
humans have enzymes to break down starch, but not cellulose
humans have only starch-digesting ribosomes in their digestive system
cellulose molecules are too big to be absorbed into cells
humans convert excess cellulose to glucose
In a study made over a period of years in a certain part of the country, the research showed that there was a low amount of rainfall, a wide seasonal variation in temperature, and short periods of daylight. What best describes these environmental factors?
biotic factors important to decomposers in the area
abiotic factors of little importance to biotic factors
biotic factors which are affected by the abiotic factors
abiotic factors that limit the type of organisms present in the area
The human body has many cells that are deep inside the body. For this reason, the human body requires
a transport system and other organs
carbon dioxide from the air
the synthesis of many inorganic compounds
the breakdown of glucose by the digestive system
Question 6
6.
Question 7
7.
Rabbits have evolved strategies that get them through periods of time when there is little food. The diagram below represents essential life functions that rabbits need to perform
Which life function in the diagram could be eliminated without affecting an individual rabbit's ability to survive when food is scarce?
excretion
digestion
reproduction
circulation
Which statement best describes the chemical digestion of carbohydrates?
It begins in A and ends in E.
It begins in A and ends in G
It begins in B and ends in C
It begins in G and ends in D.
Peristalsis occurs in the structures represented by letters