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
BARSIC [14]
3 years ago
8

A scientist wants to test whether the pH, salinity, and temperature of seawater impacts coral development. He sets up an experim

ent with three conditions: Aquarium 1: Normal pH, normal salinity, normal temperature Aquarium 2: High pH, high salinity, high temperature Aquarium 3: Low pH, low salinity, low temperature He finds that coral grow the least in Aquarium 2. He concludes that coral does not grow well in conditions with high salt. Why is this an invalid conclusion?
 The experiment does not have a control group.
 The experiment changes more than one variable at once.
 The experiment does not have an experimental group.
 The experiment does not measure any dependent variables.
Biology
1 answer:
romanna [79]3 years ago
4 0

The conclusion that coral does not grow well in conditions with high salt is invalid because (B)  The experiment changes more than one variable at once.

In order to correctly study the effect of three variables on there needs to be, 3 x 3 x 3 = 27 different aquariums (every variable takes 3 different values and there are 3 different variables).

In these aquariums, only one condition needs to be varied at a time to study its effect. To study the condition with high salt, the temperature and pH needs needs to be kept fixed at a particular value whilst varying the salinity from normal to low to high.  


You might be interested in
Why do we have different time zones
swat32

As Earth rotates, different parts of Earth receive sunlight or darkness, giving us day and night. Since different parts of Earth enter and exit daylight at different times, we need different time zones. In the late 1800s, a group of scientists figured out a way to divide the world into different time zones.

6 0
3 years ago
Read 2 more answers
The Roman Colosseum and many other ancient examples of architecture contain the metamorphic rock marble as part of their constru
Snowcat [4.5K]
True. Metamorphic rocks are pre-existing rocks that have been modified through the exposure to unusual temperatures and/or pressures. It has been used for blackboard, roofs, sidewalks, floors, and marble is an example of a  metamorphic rock that is used to make floor tiles, countertops and it is carved into statues and was used extensively in the building of the Roman Colosseum and other historic buildings. 
3 0
3 years ago
Which of the following statements is INCORRECT about how the components of hemoglobin are recycled?
Over [174]

Answer:

C

Explanation:

The globin of the RBC is broken down into constituent amino acids that can be reutilized by the phagocytic cells (this can occur in the spleen, liver and lymph node). The chains cannot be reused in their large form. The heme(iron) is transported by the blood to the bone marrow and is used to make new red blood cells.

5 0
2 years ago
What are the levels of organization within the human body from the most simple to the most complex?
Aleks04 [339]

Answer:

D. cell, tissue, organ, organ system, organism

Explanation:

also before cells there are also (and in order) atoms, molecules, organelles

(have a great day!)

;)

5 0
2 years ago
(*Need Done ASAP*)What does the theory of evolution tell us about living things?
Sindrei [870]
C. Their environment makes them change slowly over time.

In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species are related and gradually change over time.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Many researchers argue that teens today have weaker social skills than teens of the past because they are no longer used to comm
    9·2 answers
  • What responses are observed in a person experiencing acidosis, a condition defined by the ph of the blood falling below 7.4?
    11·1 answer
  • What will most likely happen if the level of greenhouse gases continue to rise? A. Global temperatures will gradually decrease.
    11·1 answer
  • What makes up the cell wall
    14·1 answer
  • What is the primary function of the calvin cycle?
    6·1 answer
  • What name is given to the most common phenotype in a natural population?
    6·1 answer
  • What is today im du/mb so i dont know what today it is
    14·2 answers
  • Ay yo I'm bord in the house bord in the house any one Feel the same way?
    5·2 answers
  • True or false? Vegetable oils are part of a balanced diet.
    15·1 answer
  • Which component of a urinalysis reflects the amount of waste products and solids in urine?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!