Answer: The external submucosa I'd the layer of the alimentary canal that contain the blood vessels,glands and nerve plexus that help to regulate digestive activity.
Explanation:
The alimentary canal or gastrointestinal tracts is the organ in the body that helps to break down ingested food into pieces that can be absorbed by human body and expels unwanted food as wastes. The alimentary canal consists of structures from mouth to the anus. The alimentary canal have four distints layers which are the the mucosa, submucosa,muscular layer and serosa.
The mucosa is the inner layer of alimentary canal and it surrounds the lumen. This layer have direct contact with digested food.
The submucosa consists of dense connective tissues, blood vessers, glands and nerve plexus. It regulate digestive activity.
The muscular layer consists of inner circular layer and longitudinal circular layer. It prevents food from going backward.
The serosa is the external layer of the alimentary canal and iits have several connective tissues.
Answer:
1. Cells are composed of chemicals and both the structure and function of cells are regulated by the basic principles of chemistry. true
2. Scientists have successfully sequenced the entire genome of humans but have not yet sequenced the entire genome of any other species. false
3. Living systems are the most complex chemical systems on earth. true
4. Living systems are governed by the same principles of chemistry and physics that govern non-living systems. true
5. Living organisms contain unique chemical elements which are not found in non-living systems. false
6. An input of energy is required to maintain the complexity of living systems. true
7. The energy conversions that take place in living systems are governed by the same laws of thermodynamics that govern non-living systems. true
Explanation:
Cells are the basic unit of life which differentiate a living thing from a non- living thing. Although a living system, is made of the same chemical elements from which a non-living t=might be made, yet they are different from the non-living things as living things carry out the seven basic principles of live.
All living things carry genetic material from which their genome is made. Scientists have currently been able to sequence the genome of humans as well as many other organisms.
Answer:
Because Paraquat only effective on the herbs not algae.
Explanation:
Paraquat did not cause the coral bleaching because the Paraquat is a herbicide which is used to kill herbs present in the field. Coral bleaching refers to the whitening of the coral due to the removal of algae. This bleaching only be done when the environment of corals are very hot. If we apply Paraquat herbicide so there is no effect on the coral because the algae present inside corals are not killed by this herbicide.
Answer:
The reactants of photosynthesis are carbon dioxide and water.
