I say A not sure tho but I did get a grade 5 in biology
Answer:
N
Explanation:
Both carbohydrates and lipids contain Carbon, Hydrogen, and Oxygen. However, all proteins have Nitrogen as well.
Answer:
Chemicals that are secreted from antigen-presenting cells then activate helper T cells.
Explanation:
<h3><u>Answer;</u></h3>
756 mm Hg
<h3><u>Explanation;</u></h3>
- Intrapleural pressure is the pressure of the air within the pleural cavity, between the visceral and parietal pleurae. This pressure changes during different phases of breathing.
- <em><u>Due to certain characteristics of the lungs, the intrapleural pressure is always lower than, or negative to, the intra-alveolar pressure. It remains approximately –4 mm Hg throughout the breathing cycle.</u></em>
- <em><u>Therefore; if the intrapulmonary pressure was 760 mm hg then the intrapleural pressure will be (760 -4) mm Hg, that is 756 mm Hg</u></em>
Many act as decomposers, breaking down the dead bodies of plants and animals and recycling the nutrients they hold. ... The fungal decay makes these nutrients and carbon dioxide available to green plants for photosynthesis, and it completes an important cycle of raw materials in the ecosystem.
