Answer: He didn’t grow a plant without fertilizer.
Explanation: Manu has nothing to compare his plant to. Meaning, he cannot prove that fertilizers help plants grow. He needs to grow a plant with and without fertilizer.
<span>Hormones are protein-based substance that are secreted by endocrine glands. They serve as a way to transport information from one part of the body to another in order to regulate.</span>
<h2>Exchange of Gases in the lungs</h2>
Explanation:
- Gas exchange occurs by process of <u>diffusion.</u>
- Gas exchange occurs in sac like structures called <u> alveoli.</u>
- <u>Oxygen</u> diffuses from the alveolar sacs into the blood in the capillaries.
- <u>Carbon dioxide</u> diffuses from the blood in the capillaries into the alveolar sac .
As blood passes through the lungs, it picks up oxygen and gives up carbon dioxide simply by diffusion down partial pressure gradients between blood and Alveoli,.
The blood having returned from body is relatively low in oxygen and high in carbon dioxide. On the other hand the alveolar air has higher oxygen concentration and lower carbon dioxide concentration.
Thus, when venous blood flows through pulmonary capillaries, oxygen moves from alveoli into the capillaries while carbon dioxide flows from capillaries into the alveoli.
Relative datingThe process of determining whether an object or event is older or younger than other objects or events.
Radiometric datingFinding the absolute age of a sample by determining the relative percentages of a radioactive parent isotope and stable daughter isotope
Answer is D:BOTH COMPARE THE OBJECT TO AN EVENT IN HISTORY.<span />
Answer:
Los componentes de un ecosistema incluyen los elementos de esa área específica y los nichos locales de las POBLACIONES de plantas, animales y otros organismos. No incluye otros ecosistemas o nichos de diferentes áreas.