This means that the micrograph was created by an electron microscope
Desertification extends beyond the expansion of existing deserts to include land degradation due to human activity in drylands. Land degradation destroys or reduces the productivity of the soil, and is caused by excessive and unsustainable activities such as deforestation, overgrazing, poor land management, soil salinization, and soil erosion.
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The brain has THREE major parts, which are the BRAINSTEM, CEREBELLUM, and the CEREBRUM.
Answer:
In quiet breathing inspiration involves muscular contractions and expiration is passive.
Explanation:
Respiration process involves two different stages, inspiration - inhalation- and expiration - exhalation-.
During inspiration, the diaphragm <u>contracts</u> and goes down, while intercostal muscles also <u>contract</u> and go up. These actions enhance the size of the thoracic box and <u>reduce internal pressure</u>. As a result, air flows in and fills the lungs.
During expiration, the <u>diaphragm relaxes</u> and the volume of the thoracic box diminishes, which causes the <u>pressure inside to increase</u>. In consequence, the lungs contract and the air is expulsed outside.
Answer:
1. cell wall, chloroplasts
2. A plant cell is rectangular, while an animal cell is circular. This is because of the cell wall.
3. The function of the chloroplasts is to make sugars and pigments for photosynthesis.
4. The vacuole acts as a storage structure and can hold food for the organism.
Explanation:
