Use the information below to answer the question following this description: Maggie read that some plants grow better if the soil is acidic.

#1: She wonders of a plant can really grow when it is exposed to acid.

#2: Maggie thinks that plants she will not grow better when acid is added to the soil.

#3: She puts potting soil in two planting containers and transplants two of her geraniums that seem about the same size into the pots. She puts the pots in the same location so that both get the same sunlight each are at the same temperature and she makes sure they get the same amount of water.

#4: However, Maggie puts a tablespoon of acidic vinegar in the water she gives to one of the plants.

#5: She measures the growth every week for five weeks.

#6: Maggie finds that the plants in the acidic soil had a greater height than those without acid.

QUESTION: Which statement number is describing the independent variable?

a. 3
b. 4
c. 5

4

Explanation:

it changes the outcome and makes it different from the other plant

hope this !

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.