Answer:
Photosynthetic organisms provide food for humans as well as glucose and oxygen. All the food we eat either directly (if we eat a plant) or indirectly (if we eat an animal that eats plants or other animals) can be traced to photosynthesis. Actually, almost all organisms obtain their energy from photosynthetic organisms.
Answer: Xylem fibers and xylem parenchyma are the elements of the xylem which is a vascular tissue in plants.
Explanation:
Xylem fibers are dead cells whereas the xylem parenchyma are living cells.
Xylem fibers are responsible for providing structural support to the entire structure of xylem whereas the xylem parenchyma is involved in conducting of water and minerals.
In xylem fibers the lignin is present whereas it is absent in xylem parenchyma.
Answer:
for different purpose like accuracy, validate
Answer:
The testes are two oval-shaped male reproductive glands that produce sperm and the hormone testosterone.
A) remain in the body after production
B) flag antigens for destruction
C) are an important part of the immune system
D) all of the above
D) ALL ARE CORRECT!!
