A keystone species helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether.
Answer:
A. I would be startled by the sudden noise and would probably take cover some wheres. B. My nerves in my ears would send a signal to my brain causing my twitching muscle fibers to react quickly and heart might stop for a moment. C. The heart rate would increase the brain would be aware that there may be more sudden noises or events your adrenaline would be pumping and your quick twitch muscle fibers would probably be tense or contracted ready to make quick sudden movements if necessary and your hairs would stick up i guess as extra senses for if something would touch you.
Explanation:
not to mention but by the time you are startled your senses would probably be heightened due to you being aware of your surroundings such as you would be constantly looking around you would hear better and probably move quicker for a short period of time due to pumping adrenaline.
Answer:
Answer are given below.
Explanation:
The main function of Carbohydrates to provide quick energy to the body. Examples of carbohydrates are sweet foods and drinks etc. The main function of Lipid is storing energy, signaling, and acting as structural components of cell membranes. The element present in lipids are carbon, hydrogen and oxygen, phosphorus, nitrogen and sulfur. Beef fat and heavy cream are the examples of lipids. Proteins are the substances that is responsible for building muscles. Amino acid is the monomer of proteins. Elements present in proteins are carbon, hydrogen, and oxygen atoms, nitrogen and sulfur atoms. The main function of nucleic acid is to provide storage for genetic information. Elements present in nucleic acid are carbon, hydrogen, oxygen, nitrogen and phosphorous. DNA and RNA are the examples of nucleic acid.
Answer:
The three muscle layers in the stomach's mascularis externa.
Explanation:
The stomach has four layers in their wall; The mucosa which is the inner lining of the stomach that secretes hydrochloric acid. The submucosa made of connective tissues, nerve fibres and blood vessels. The mascularis externa, made of 3 muscle layers responsible for contraction and parastalsis. The outer fibrous membrane or layer called serose.
The muscularis externa in the stomach is unique in that it has three muscle layers compared to the rest of the gastrointestinal tract. This is because the stomach has to work extra hard in mechanically breaking down chunks of food into smaller pieces during digestion.
The answer is D. Sedimentary rock takes millions of years to form since sedimentary rock is formed by sand cementing together over long periods of time.
