Answer:
Explanation:
Out of the 25 elements found in living things, 19 of them can be found in some organisms but not all.
There are 25 elements that living things on Earth need to survive. Out of all these 25 however, only 6 are needed by all living organisms universally. They include:
Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus, and,
Sulfur
In conclusion, this means that 19 elements can be found in some living things but not all of them while 6 can be found in all of them.
Answer:
The first type is the primary consumer, an organism that ONLY eats producers.
Explanation:
The first type is the primary consumer, an organism that ONLY eats producers. That means that primary consumers ONLY eat plants or algae. Examples include cows (who eat grass and hay) and many types of insects (who collect and use pollen or eat leaves on trees).
saliva in mouth
pepsin,hcl,and mucus are responsible for digestion of food
Answer:
1. Ends of the respiratory branches are called alveoli.
2. C. To control blood flow to different areas of the body depending on activities
Explanation:
1. The trachea divides into left and right primary bronchi which in turn divide multiple times upon entering the lungs and make the bronchial tree.
The final branches of the bronchial tree are the terminal bronchioles that lead to alveoli. The alveoli are the balloon-shaped structures and serve as the site of gas exchange between the blood and inhaled air.
2. The opening and closing of sphincters of capillary beds regulate the direction of blood flow. The opening of sphincters allows the blood to flow into associated branches of capillary beds while closed sphincters direct the blood from arterioles to venules via thoroughfare channel.
This local change in blood flow is responsible for the autoregulation of blood flow to different tissues to match their respective metabolic demands. For example, during physical activity, more blood is directed to skeletal and cardiac muscles.
