Answer:
- the region surrounding the earth or another astronomical body in which its magnetic field is the predominant effective magnetic field.
- the region of Earth’s magnetic field shaped by the solar wind
Explanation:
A magnetosphere is a region around any celestial body producing magnetic field. It is the portion of magnetic field around the Earth which interacts with the charged particles emitting from the sun at high speeds. It is a pear shaped magnetic field region surrounding the Earth. It is shaped by the solar wind.
Thus, the correct answer is b. the region of Earth’s magnetic field shaped by the solar wind
Answer:
stars spend most of their lives on the main sequence fusing hydrogen gas to helium gas. stars eventually swell up to form a red giant star. stars like the Sun end their lives as planetary nebulae and white dwarfs.
Explanation:
Structure B. Chloroplasts are the site of ATP production in plant cells
11. c. crossing-over. Notice how one of the bottom arms of each of the gray and white chromosome overlaps with each other, then their genes switch to the other's arm. That's called crossing over, when homologous chromosomes' genes flip-flop with each other.
14. b. meiosis. Gametes are special daughter cells that are either sperm or egg for sexual reproduction. Since genes are shuffled and daughter cells are not like parent cells, this is meiosis. 1 parent --> 4 non-identical gametes.
16. a. centromeres. During late prophase and all of metaphase of mitosis, identical sister chromatids are fused together at the center of the chromosome "X" by what's called a centromere. Then, during anaphase, the sisters are pulled apart, at these centromeres, by spindles attached to centrioles toward opposite sides of the cell.
17. c. Metaphase only. Although late prophase has this appearance of chromosomes, the best answer is probably only metaphase. It's not in anaphase because that's when sister chromatids are pulled apart at their centromeres.