1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kruka [31]
2 years ago
6

Trey is conducting an experiment to determine which fish food causes the most goldfish activity over a period of two weeks. He i

s going to set up ten fish tanks with 4 goldfish each. He will feed the fish in half of the tanks Swift Salmon food and the fish in the other half of the tanks Fast Flounder food. He will expose them to direct sunlight for 4 hours per day. Each tank will have the same size and type of goldfish, which will be fed the same amount of fish food. Each tank will be filled with the same type and amount of water and with the same type and amount of river rock.
Which change would be the most effective way to improve the validity of this experiment?
A) Increase the number of goldfish in each tank.
B) Increase the daily amount of food for each tank.
C) Create another group that is fed regular fish food.
D) Increase the number of tanks in each treatment group.
Biology
1 answer:
statuscvo [17]2 years ago
6 0

Answer: C)

Explanation: You need a control group.

You might be interested in
In many plants, stomata are found only on the lower surface of the leaf. The most likely explanation for this fact is that
sergejj [24]
D. Plants have adapted to deal with the sun in many different ways, and this is one. The stomata are regulated by guard cells, which are activated by different things depending on the species of plant, and guard cells are supposed to keep the stomata from staying open all the time and losing too much water to evaporation. So, the solution is to have the stomata on the bottom of the leaf to prevent direct sunlight contact (and therefore more evaporation), and guard cells to protect the stomata. 
6 0
3 years ago
What is combustion and how does it affect the carbon cycle?
snow_tiger [21]
<span>During photosynthesis, plants use carbon dioxide and produce oxygen. During metabolism oxygen is used and carbon dioxide is a product. Humans impact the carbon cycle during the combustion of any type of fossil fuel, which may include oil, coal, or natural gas.</span>
6 0
3 years ago
Read 2 more answers
Saccharomyces cerevisiae (a yeast species) mutants are available that grow on pyruvate or ethanol, but not sugars or glycerol.
mezya [45]

Answer:

The enzyme is the pyruvate kinase

Explanation:

The designated enzyme can only grow in pyruvate or in ethanol. They are said to be in anaerobic conditions. If the end product of glycolysis is pyruvate and the enzyme that transforms phosphoenol pyruvate into pyruvate is called pyruvate kinase. In a reaction under anaerobic conditions, the pyruvate is transformed into ethanol. So if the pyruvate kinase enzyme is mutated, pyruvate cannot be transformed into ethanol and Saccharomyces cerevisiae could not survive in that medium.

7 0
2 years ago
A. convert sunlight to chemical energy. B. The , the , and the support the plant cell and help it to maintain its shape. C. stor
Bumek [7]

Answer:

1 plus 1 + 2= 8 ur welcome ;]

Explanation:

6 0
2 years ago
Sickle cell anemia is a genetic disorder in which the hemoglobin responsible for transporting oxygen is misformed. The disease b
notka56 [123]

Answer: protein , nuclei acid

Explanation:

8 0
3 years ago
Other questions:
  • What is the difference between a monosaccharide and a disaccharide?
    13·1 answer
  • Initiation of bacterial mRNA synthesis (transcription) requires
    15·1 answer
  • A client with a gastrointestinal bleed has been prescribed two units of packed red blood cells over three hours each, which the
    8·1 answer
  • Table salt is the result of a(n) _____.
    14·1 answer
  • About how much energy’s lost when an organism consumes another organism from a different trophic level?
    15·1 answer
  • a solar eclipse occurs when positions of the sun, the moon, and earth are such that one of these objects is between the other tw
    7·1 answer
  • What happens as warm air is less dense, what tends to
    5·1 answer
  • True or False: Evolution can occur at the organismal level.
    9·1 answer
  • How do you know that the gene being transcribed in the animation is in a prokaryote?
    14·1 answer
  • View attachment.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!