Answer:
Codominant
Explanation:
Often, when an individual has two different alleles that determine its certain trait, the effect of the dominant allele will be expressed, while the effect of the recessive allele will be hidden. For example, this is how we inherit eye color.
However, it isn't always like this. Sometimes, the effects of both (different) alleles are expressed. This phenomenon is called codominance, and the scenario you were given is an example of it.
Answer:
c. a proton gradient set up across the thylakoid membrane
Explanation:
During the photosynthesis (this also occurs in cellular respiration in mitochondria), hydrogen ions (H+) move across the thylakoid membrane down their electrochemical gradient (from the area of their higher concentration to the area with hydrogen ions lower concentration). An ion gradient can be used for the production of ATP.
Answer:
Because of the tilt of the earth on its axis. When the North Pole is tilted towards the Sun, the northern hemisphere experiences summer solstice. At this time, since the south Pole is tilted away from the Sun, the southern hemisphere experiences winter solstice.
That is why, When it is summer in the northern hemisphere, it is winter in the southern hemisphere. It's all because the Earth is tilted on its axis.
