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]
3 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]3 years ago
6 0

Answer: C)

Explanation: You need a control group.

You might be interested in
Eye pigment in a particular strain of fly is determined by two genes. An autosomal gene that controls the color of the pigments
Semenov [28]

RrXtXt×RrXTY is representing the cross between the white eyed female and red eyed male.

Option D

<h3><u>Explanation:</u></h3>

The genes that are discussed here both are completely dominant over their recessive alleles. In the autosome, the dominant R gene is responsible for red eye and recessive r gene is responsible for sepia eye. But in allosome, the dominant T gene allows the eye colour to be expressed and the recessive t gene doesn't allow eye colour to be expressed and makes it white.

As the female do have 2 X chromosomes and the female is white eyed, then both the chromosomes of female have t gene.

As the male is red eyed and have one X chromosome, so the male must have atleast one R gene in autosome to make the eye colour red and must have T gene in his X chromosome to make it appear in phenotype.

So the most possible cross that is given here is RrXtXt×RrXTY.

6 0
3 years ago
Explain how cell division allows changes in the DNA of a zygote to be inherited by future generations
Katarina [22]

Answer:

Explanation:

When cell divides, the DNA will replicate in the parent cell or make copies of itself and this will make the chromatics to split or divide in order to create a new cell or daughter cell which contain the exact same DNA. The daughter cell then pass these DNA to subsequent generations, when it also undergo cell division and the dna is been replicated

6 0
3 years ago
What combination of sex chromosomes is shown in the image?<br> o<br> Please help a boi out ;-;
mestny [16]
C)XY ...............
5 0
3 years ago
Read 2 more answers
All layers of the cean have the same amount of oxygen
VLD [36.1K]

Answer:

What do I do with this information? XD

7 0
3 years ago
Read 2 more answers
During respiration, members of the animal kingdom use ______ and then release ______ as a waste gas.
eduard
Oxygen; carbon dioxide
8 0
3 years ago
Other questions:
  • The phase of the bacterial growth curve in which newly inoculated cells are adjusting to their new environment, metabolizing but
    13·1 answer
  • Tubulovillous adenoma with high grade dysplasia
    6·1 answer
  • What is the solution?<br>-3=t-12​
    8·2 answers
  • Which organs or structures are involved in a gastroenterocolitis?​
    9·2 answers
  • If one parent is a carrier of the cystic
    10·1 answer
  • g Use the information gathered in the Nature Article Expanding the Genetic Code in the Laboratory to answer the question. How ma
    13·1 answer
  • In what ways are conjugation and transformation similar and in what ways are they different?
    13·2 answers
  • In human populations of northern European origin, the disorder called hemochromatosis causes excess iron uptake from food and af
    14·1 answer
  • Which statement best describes evolution in a population?
    11·2 answers
  • Which organ in body cannot feel pain? 1-2 sentences
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!