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
ValentinkaMS [17]
4 years ago
15

A scientist who is researching marshes observes that marsh grass, Spartina bakeri, grows to different heights at different locat

ions in the marsh. If the scientist wants to find the reason for this difference, what is the correct first step? Conduct an experiment and change only one variable at a time. Determine which technology would assist most in answering the question. Form a research question based on knowledge of the marsh. Establish a control group for comparison.
Biology
2 answers:
9966 [12]4 years ago
7 0
I belive "form a research question based on knowledge of the marsh," in other words, your hypothesis which is the 1st step in the scientific method after observation (which your scientist has already done)
MAXImum [283]4 years ago
7 0

The correct first step would be to conduct an experiment and change only one variable at a time.

There are generally two types of variables in all the valid research, that is, independent and dependent variables. These variables permit a researcher to find the precise association among the variables.  

Thus, in the given study, if the scientists are aiming to determine the cause of length distinction in the marsh grass, then he has to perform an experiment with the application of independent and dependent variables.  


You might be interested in
What’s the difference between a standing defense and an induced defense?
gizmo_the_mogwai [7]

The correct answer is: 4) Standing defenses are always present; induced defenses develop in response to a threat

Induced defense is defense that can be changed or invoked when needed. Induced defenses are slow to happen. When invoked, induced defense requires energy but otherwise doesn’t.

Standing defense is always there. It is use, for example when predation is a constant threat.

3 0
3 years ago
Which of the following is an example of a population?
sesenic [268]

Answer:

The correct answer will be option-A

Explanation:

The ecological population is the group of the organism belonging to the same species which live or is found in the particular area and can interbreed.

Since in the given question, the redwood trees live in the same geographical area (forest) which can interbreed shows the population. The other examples represent the community which consists of more than one species.  

Thus, option-A is the correct answer.

3 0
3 years ago
Which parasitic protist evades the host immune system by altering its surface proteins with each generation?
aleksandr82 [10.1K]

Answer:

Trypanosoma brucei

Explanation:

T. brucei is a unicellular eukaryotic parasite that causes sleeping sickness. This organism has an elongated body, central nucleus, only an elongated mitochondria housing the kinetoplast, where the mitochondrial DNA is located; It has a scourge that gives it motility. Its undulating cell membrane, as a result of flagellar movements, is covered with glycoproteins that elicit little immune reaction, allowing this parasite to go unnoticed.

This organism infects the host by evading the host's immune system by altering its surface proteins with each generation.

7 0
3 years ago
Choose all the answers that apply.
patriot [66]
Is caused by vibration, can travel through a vacum, and travels in longitudinal waves<span />
5 0
3 years ago
Read 2 more answers
The father donates the _______________, and the mother donates the ___________.
balandron [24]

Answer: The father donates the Y chromosomes, and the mother donates the X Chromosomes

Explanation:

5 0
3 years ago
Other questions:
  • DNA contains all of the genetic information for a cell and is often called?
    13·2 answers
  • How do you know that your pregnant? How long does it take to know if you are pregnant
    9·2 answers
  • With the Moon directly over the
    15·1 answer
  • In which decade were the first laws important laws passed to decrease to water pollution?
    11·2 answers
  • During lung inflation Multiple Choice surfactant is found in the pleural cavity. the lungs cling to the internal surface of the
    5·1 answer
  • How are the circulatory systems in animals and plants alike?
    12·1 answer
  • An environmental change causes a decrease in the amount of oxygen that is dissolved in the pond water. Explain why this change w
    11·1 answer
  • which aspect of el nino can give scientists a preview of earth as temperatures rise with global warming?
    9·1 answer
  • How does Earth’s orbit affect the weather and climate?(1 point)
    12·2 answers
  • There are no carriers for Huntington’s Disease - you either have it or you don’t. With this in mind, is Huntington’s disease cau
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!