The correct answer is D. Earth's axial tilt causes one side of Earth to be more exposed to the Sun than the other.
Explanation:
Seasons and therefore daylight in different locations of the Earth are mainly explained through two main factors. The first factor is that Earth orbits around the sun which make different areas of the Earth to be exposed to different intensities of sunlight. Additionally, the differences between Northen and Southern Hemispheres regarding seasons occur due to the Earth's axial tilt that means the Earth is placed obliquely and this makes one of the hemispheres to receive more light than the other and causes seasons to occur in the North and Sout hemisphere at a different time. According to this, the option that explains the variations in seasons and daylight is "Earth's axial tilt causes one side of Earth to be more exposed to the Sun than the other".
<span>B. A prokaryotic cell does not have nucleus and the other one does. The most defining characteristic of eukaryotic cells is their true nucleus. Prokaryotes lack true nucleus</span> and membrane bound organelles.
Cells are so little, so they can maximize their ratio of surface area to volume.
Explanation:
Smaller cells have a higher ratio which allows more molecules and ions to move across the cell membrane per unit of cytoplasmic volume. Cells are so small because they need to be able to get the nutrients in and the waste out quickly.
Women should stand by at least two months after travel (or 2 months after symptoms started to manifest if they get sick) before trying to get pregnant.The waiting period is longer for men because Zika stays in semen longer than in other body fluids.
