42. Students made an electromagnet by wrapping a wire in loops around an iron nail and attaching the wire to a battery, as shown below.
The students conducted a test to learn how the number of wire loops affected the number of paper
clips held by the electromagnet. The table below shows the results of the test.
Number of wire loops
10
20
30
40
Number of paper clips held
2.
4
7
9
Based on the information from the table, which of the following is the outcome (dependent)
variable in this experiment?
A. The number of wire loops wrapped around the nail.
B. The number of paper clips held by the electromagnet.
C. The material the nail was made of.
D. The size of the battery,

oxidation

explanation:

answer

they deliver oxygen to the blood

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.