Answer:
C. They have trouble moving materials in and waste products out
Explanation:
A biochemical pathway (also called a metabolic pathway) is a series of enzyme-mediated reactions where the product of one reaction is used as the substrate in the next. Each enzymes is coded by a different gene. ... A mutation within a gene will often result in a non-functional enzyme.
<span>The answer is mammalia, whales and humans are both mammals.</span>
not only in the land but also in the ocean there is food web that is why we can find different spices of creature in the ocean alive
there are producer consumer and decomposer
u can present by giving example
u can give oration how the organisms are adapted in the water
Answer:B The nervous system controls the speed at which food moves through the digestive system
Explanation:During digestion,the nervous system helps to control the actions that takes place.they stimulate digestive juices and the muscles of digestive organs.
The extrinsic nerves comes to the digestive tract from the brain and the spinal cord.they release chemicals; acetylcholine and adrenaline.
Acetylcholine causes the muscles of the digestive organs to squeeze and push the food through the tract.adrenaline relaxes the muscles and reduces blood flow to the organs.these occurs unconsciously.
The intrinsic nerves acts to speed up or delay the movement of food in the digestive tract and also the production of digestive juices.