Explanation:

Seed formation without fertilization in flowering plants involves the process of ---
A) APOMIXIS
Their gametes would have half the number of chromsomes, so 24.
Guard cell o is ordered to opening and closing of stomata.
Answer: warm front
Explanation: When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses. This type of front is called a warm front. It generates nimbostratus clouds, which can result in moderate rain.
The piano could only be played with 12 fingers, which is rare because humans normally have ten fingers.