Answer:
a) stomata
Explanation:
The stomata are little pores / doorways / openings that have the express purpose of allowing gases in and out. Without this, plants would not be able to fix carbon, which is essential in respiration.
Why not c or b: The xylem and phloem channel water through the plant, not gases.
Why not d: The cuticle is the waxy outer layer of the leaf meant to protect it, not allow gases through.
Primary succession can occur in essentially lifeless areas or regions in which the soil is incapable of sustaining life as a result of such factors as lava, sand dunes, or rocks left from a retreating glacier.
There are different types of biomes but,here`s my example
https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjBhKrevPjeAhXym-AKHZrCCFsQjRx6BAgBEAU&url=https%3A%2F%2Fkidsbiology.com%2Fbiology-basics%2Fpolar-ice-biome%2F&psig=AOvVaw0ggrhmzAXQiH3vAVGusTXb&ust=1543542147595612
Answer:
D.group;the same number of valence electron
Explanation:
for eg O It Has 8 Atomic No 2,6
S It Has 16 Atomic No 2,8,6
Answer:
A I think I may be wrong 17 more days until Christmas
