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lara31 [8.8K]
2 years ago
12

Which of the following was a control variable in this experiment?

Biology
1 answer:
DIA [1.3K]2 years ago
7 0

Answer:

<em><u>b</u></em>

Explanation:

<em><u>mark</u></em><em><u> </u></em><em><u>me</u></em><em><u> </u></em><em><u>as</u></em><em><u> </u></em><em><u>brainleist</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em>

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17. What is pathogenic bacteria? How does it infect an organism?
deff fn [24]
<span>Pathogenic bacteria are the disease causing bacterias
Infection occurs when </span>viruses<span>, </span>bacteria<span>, or other </span>microbes <span>enter your body and begin to multiply. Disease, which typically happens in a small proportion of infected people, occurs when the cells in your body are damaged as a </span>result<span> of infection, and </span>signs and symptoms<span> of an illness appear.</span>
7 0
3 years ago
What are abiotic and biotic factors?
Setler79 [48]

Answer:

abiotic factors are factors that are not organ or biotic as one would say like the nevirmwnt or air or water biotic factors are things like tress food plants ect

3 0
3 years ago
Read 2 more answers
The Y axis of a graph gives the units for the
igor_vitrenko [27]

Answer:

The y-axis of a graph gives the units for the dependent variable.

Explanation:

Dependent variable is the variable being tested and measured in an experiment, it depends on the independent variable.

7 0
3 years ago
A population of 150 individuals has an allele frequency of 0.2 for the dominant allele (H) and a frequency of 0.8 for the recess
Amanda [17]
Hardy-Weinberg Equation (HW) states that following certain biological tenets or requirements, the total frequency of all homozygous dominant alleles (p) and the total frequency of all homozygous recessive alleles (q) for a gene, account for the total # of alleles for that gene in that HW population, which is 100% or 1.00 as a decimel. So in short: p + q = 1, and additionally (p+q)^2 = 1^2, or 1
So (p+q)(p+q) algebraically works out to p^2 + 2pq + q^2 = 1, where p^2 = genotype frequency of homozygous dominant individuals, 2pq = genotype frequency of heterozygous individuals, and q^2 = genotype frequency of homozygous recessive individuals.
The problem states that Ptotal = 150 individuals, H frequency (p) = 0.2, and h frequency (q) = 0.8.
So homozygous dominant individuals (HH) = p^2 = (0.2)^2 = 0.04 or 4% of 150 --> 6 people
Heterozygous individuals (Hh) = 2pq = 2(0.2)(0.8) = 0.32 or 32% of 150
--> 48 people
And homozygous recessive individuals (hh) = q^2 = (0.8)^2 = 0.64 = 64% of 150 --> 96 people
Hope that helps you to understand how to solve these types of population genetics problems!
6 0
2 years ago
A ______________ is a change in matter in which the substances that make up the matter change into other substances that have ph
Eduardwww [97]

Answer:

chemical change.

Explanation:

There are two types of changes in matter: physical change and chemical change.

physical change- it is a change in matter that alters only its physical properties or its physical appearance. This type of change is reversible. For example- freezing of water, the water turns into solid ice and it can be reversed by melting the ice.

chemical change- it is a change in matter that alter its chemical and thus its physical properties. Most chemical changes are irreversible. for example- burning of paper, results in black soot and ashes- Thus changing both physical and chemical properties.

7 0
2 years ago
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