Answer:
A. Transport of materials in xylem
Xylem tissue helps in the transport of water and minerals
Water is transported upwards from roots to aerial parts of plants
Transport in xylem requires physical forces such as transpiration pull.
B. Transport of materials in phloem
Phloem tissue helps in the transport of food.
Transport of food in phloem requires energy in the form of ATP.
Food is transported in both upward and downward directions.
Answer:
CLOSED.
Explanation:
Stomata are found in epidermal layers in green aerial parts of plants, especially leaves. They occur mainly on the lower surface of dicotyledonous leaves, although on monocotyledonous, they are found on both surfaces. Intercellular air spaces found throughout the leaf are linked to stomata.
Stomata permits plant uptake of carbon dioxide, which is a necessity for photosynthetic processes. They also help to reduce water loss by closing when conditions are hot or dry. Stomata look like tiny mouths which open and close as they assist in transpiration.
Therefore, it can be said that Stomata adjust temperature, staying closed when temperatures are hot and dry.
Answer:
Nitrogen Base
Explanation:
This molecule is made of a nitrogen base (adenine), a ribose sugar, and three phosphate groups.
The twenty- first pair of chromosomes failed to seperate during meiosis, so aziz received three of these chromosomes rather than the normal two. Aziz has down syndrome.
