The light reaction begins in photosystem 1.
true
true
false

False

Explanation:

The given statement is False.

The light reaction begins in photosystem 2 (PS2).

In the process of light reactions in photosynthesis energy is generated so that it can be use in the dark reactions.

During light reaction, water molecule breaks down into oxygen molecule and an electron.  this free electron attains  attains a higher energy level in the reaction center of photosystem 2. The state of an unstable electron undergoes an electron transport chain (ETC). The electron flows from PS2 to cytochrome and then to photosystem 1 (PS1). In PS1 the light-independent energy takes place where further electrons are transfered to NADPH.

c is the answer to this question. altitude affects the weather because air molecules evaporate.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.