Answer: The Earth's axis rotates (precesses) just as a spinning top does. The period of precession is about 26,000 years.
Explanation:
Answer: The correct answer for the fill in the blank is A) Circulatory, immune.
Circulatory system also called cardiovascular system is a vast network of organs and vessels that allow the circulation of blood so as to transport nutrients, oxygen, other gases, and hormones to different parts of the body.
Blood contains different cells like white blood cells, red blood cells, platelets.
White blood cells ( also called leukocytes) work closely with immune system. They provide defense against pathogen ( disease causing organisms) through various ways ( like ingesting foreign material, producing antibodies to clear the antigens). By doing so, they protect us from infection and disease.
Answer:
The ability to allow needed materials to enter and wastes to exit as well as the ability to block unneeded materials from entering the cell.
Explanation:
<em>A selectively permeable cell membrane only allows some things to go through it, therefore this answer choice is the correct one because it is explaining how it is selectively permeable.</em>
Answer:
you can see the moon because since the earth blocks sunlight
Earth's atmosphere bends sunlight and indirectly lights up the Moon's surface
Answer: It is B, A, C and C
Explanation:
You were correct
