Gas exchange between the air in the lungs and the blood takes place in the alveoli.
ALVEOLI:
- Gaseous exchange is a phenomenon whereby gases (carbon dioxide and oxygen) are taken in and out of the body.
- Carbon dioxide is a product of respiration, hence, giving out. Oxygen is a reactant, hence, taken in. Carbon dioxide and oxygen are absorbed and removed from the blood in the general respiratory process.
- The alveoli are richly supplied with blood capillaries and are sites of gaseous exchange in some living organisms.
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The process is called Fertilization
Answer:
c. the formation of bone from within fibrous membranes
Explanation:
On the basis of formation ossification process is divided into two types:
1) Endochondral ossification : The process by which bone is formed from haline cartilage.
2) Intramembranous ossification : The process by which bone is formed by replacing a fibrous membrane and not from cartilage. This type of ossification occurs as follows :
- An ossification center appears in the fibrous connective tissue membrane.
- Bone matrix is secreted within fibrous membrane
- Woven bone and periosteum forms.
- Bone collar of compact bone forms and red marrow appears.
Hence option c. the formation of bone from within fibrous membranes is the right option
Answer: Positive: Coastal areas help prevent erosion; filter pollutants; and provide food, shelter, breeding areas, and nursery grounds for a wide variety of organisms.
Negative: Added to this are impacts such as increased erosion due to coastal development, increased pollution, and increased boat traffic - all of which lead to further habitat loss and put increased pressure on marine species. ... Other coastal developments can also harm sensitive marine habitats and species.
Explanation:
