Answer:
<u>Cuticle</u> - It also has a waxy material that protects the leaf from attacks by bacteria, protects inner tissues from mechanical damage and acts as a water proof layer to prevent excessive water loss.
<u>Palisade mesophyll</u> - They have many chloroplasts used to absorb light energy used for photosynthesis.
<u>Spongy mesophyll</u> - The cells are loosely packed together leaving air spaces that allow for air circulation and gaseous exchange.
<u>Guard cell</u> - They have thick inner walls and thin outer walls to control the opening and closing of the stomata.
<span>Unit train cargo uniformly goes from location A to B, while mixed train cargo is mixed in delivery, from point A to B, but also A to C, etc. Unit trains are more efficient because no extra time is needed to detach cars to send to other locations.</span>
Answer:
C. At least five mass-extinction events have occurred during the last 500 million years.
Explanation:
- The history of mass extinct is related to the five mass extinctions that are caused over by the 350 million years n which many species have disappeared in there short geologic time.
- A massive extinction is caused in the Permian Triassic extinction event i.e about 250 mn years ago which on an estimate has killed 90% of the species.
- The Cretaceous–Paleogene extinction event that occurred over 66 million years ago is known to have wiped out the dinosaurs and many other species.
Answer:
endoplasmic reticulum
Explanation:
ER is full with proteins than help to synthesize phospholipids in plant cells
