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skelet666 [1.2K]
3 years ago
6

Which statement about the use of independent variables in controlled experiments is correct?

Biology
1 answer:
Nataly_w [17]3 years ago
8 0

Answer:

3. Only one independent variable is used for each experiment.

Explanation:

A controlled experiment is an experiment in which one variable is changed or tested at a time, while others are kept constant. In an experiment, one of the two major variables is INDEPENDENT VARIABLE. Independent variable is the variable that is changed or manipulated in the experiment.

In a controlled experiment, only one independent variable is used at a time i.e. ONLY one variable is changed or manipulated for each experiment. This is to ensure the validity of the experiment.

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Based upon data from the Human Microbiome Project (HMP), define microbial antagonism and discuss how the various microbial popul
Xelga [282]

Answer:

Suppression of one microorganism by another microorganism.

Explanation:

Microbial antagonism is the suppression of one microorganism by another microorganism. For every organism, God creates another organism in order to control its growth and population. So harmful microorganisms that cause diseases in human can be controlled by another beneficial microorganism. If the beneficial microorganisms are removed from the environment, the harmful microorganisms causes more damage to human and their property.

4 0
3 years ago
Which of the following is NOT a method that maintains lymph flow? Which of the following is NOT a method that maintains lymph fl
exis [7]
<h2>Capillary Smooth Muscle Contraction</h2>

Explanation:

  • Blood flows through blood vessels, which form the closed system called the circulatory system. Like a system of roads, the circulatory system has its highways, back roads, and alleyways, which we call arteries, veins, and capillaries
  • Capillaries are the alleyways that extend and branch into every tissue of your body, ensuring that every cell has a blood supply. It is here, in the capillary beds, that your cells pick up oxygen and nutrients and drop off carbon dioxide and wastes
  • Muscles are composed of two major protein filaments: a thick filament composed of the protein myosin and a thin filament composed of the protein actin. Muscle contraction occurs when these filaments slide over one another in a series of repetitive events
  • All muscles contract as a result of interaction between special proteins within the myocytes. Skeletal, cardiac, and smooth muscle cells synthesize the contractile proteins actin and myosin, which are needed for muscular contraction

7 0
4 years ago
By which mechanism of heat transfer does heat travel in a straight line at the speed of light, allowing heat to travel through v
Sladkaya [172]

Radiation is the  mechanism of heat transfer by which heat travel in a straight line at the speed of light, allowing heat to travel through vacuums and air spaces.

Radiation in physics is the emission or transmission of energy in the form of waves or particles through space or matter medium. This includes:

  • Electromagnetic radiation such as radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays (γ)
  • Particle radiation beams such as alpha rays (α), beta rays (β), proton rays, and neutron rays (with static energy non-zero particles)
  • Acoustic Radiation such as ultrasound, sound waves, seismic waves (due to physical transmission media)
  • Gravitational radiation in the form of gravitational waves, or waves of curvature of space-time

Radiation is often classified as either ionizing or non-ionizing, depending on the energy of the particles it hits.

Learn more about Radiation here : brainly.com/question/893656

#SPJ4

3 0
2 years ago
A scientist investigated DNA replication in two groups of cells, labeled A and B. She injected radioactively labeled nucleotides
hichkok12 [17]

Answer:

A is a eukaryotic cell while B is a prokaryotic cell

Explanation:

The researcher can conclude that <u>cell A is eukaryotic while cell B is prokaryotic.</u>

In eukaryotic cells, the <u>DNA is located majorly in the nucleus and the replication of the DNA happens in the nucleus</u>. Hence, it is only logical to find segments of new DNA in the nucleus of cell A during replication.

<u>Prokaryotic cells, however, lack a nucleus</u>. Their DNAs lie freely within the cytoplasm. This thus means that replication can only happen in the cytoplasm. Hence, it follows logically to find a new DNA segment in the cytoplasm of cell B.

3 0
3 years ago
Which area shows the climax community of secondary succession?
Stolb23 [73]
Usually the place with the most stable community
(ex: Tall growing trees, plants that live a long time)
5 0
4 years ago
Read 2 more answers
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