Answer:
parenchyma have primary cell walls (thin) and are unspecialized and metabolically active (photosynthesis, respiration)
collenchyma have primary cell walls (unevenly thick) which provide a level of structural support in areas of high growth, they are alive so have a protoplast
sclerenchyma have secondary cell walls which means they have lignin and are thick, they are functionally dead at maturity so provide support in areas that are done growing and are involved in transport of water
Explanation:
PLEASE HELP During a lunar eclipse, what is the penumbra?(1 point)
A. It is the part of the moon’s shadow where the sun is completely blocked.
B. It is the part of Earth’s shadow where the sun is completely blocked.
C. It is the part of Earth’s shadow where the sun is only partially blocked.
D. It is the part of the moon’s shadow where the sun is only partially blocked.
Answer:
B
Explanation: