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
Nady [450]
3 years ago
9

Why do scientists usually try to work without making the animals aware that humans are present

Biology
1 answer:
FromTheMoon [43]3 years ago
4 0

Answer:

In animal field studies, why do scientists usually try to work without making the animals aware that the humans are present? It is necessary to observe the animals without disturbing them. When a controlled experiment is not possible, why do scientists try to identify as many relevant variables as possible?

You might be interested in
Cells from a squirrel are considered eukaryotic and bacteria cells are prokaryotic because -​
Vadim26 [7]

Answer:

D

Explanation:

Prokaryotic cells have no nucleus, eukaryotic cells do. A squirrel is eukaryotic, therefore it’s genetic material will be stored in the nucleus.

4 0
2 years ago
Earth's energy sources include both renewable and nonrenewable resources. Name at
madam [21]

Answer:

See Explanation

Explanation:

I wont be able to answer your full question due to that I don't know where your home is located.

<h2><u>Question 1</u></h2>

Four possible sources of energy in your home are:

Thermal Energy, like your microwave or oven

Solar Energy, solar panels if you have any

Wind Energy, like a fan blowing

Electrical Energy, like plugging in a device

<h2><u>Question 2</u></h2>

Probably, in our world today, your home would mostly be powered with one of the following:

Solar Energy: If you have solar panels installed. They generate a lot of energy for electricity.

Electrical Energy: Power Plants create electric energy that go through cables to millions of billions of homes. Electrical Energy is most people's main source of power due to electric companies providing it every second.

I will continue on, in order to answer Questions 3 and 4, your location is required.

Hope this helped! :)

7 0
3 years ago
If you put a cell in pure water, will the cell shrink, stay the same size, or swell? Why?
Maslowich

Answer:

swell

Explanation:

the cell will swell and become turgid as more water will be absorbed into said cell. this process is called osmosis, where water passes through a partially permeable membrane.

4 0
2 years ago
A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 4 picograms of DNA
damaskus [11]

Answer:

b: 8;8

Explanation:

Mitotic or meiotic cell division constitute the m phase of the cell cycle. At the end of the m phase, the new cells enter the interphase stage of the cell cycle. The interphase is further sub-divided into;

  • <em>the G_0 phase,</em>
  • <em>the G_1 phase,</em>
  • <em>the S phase; and</em>
  • <em>the G_2 phase</em>.

The G_0 phase is essentially a resting phase. Cells that do not need to divide except when necessary move into this phase after exiting the m phase.

Actively dividing cells enter the G_1 phase after exiting the m phase. Cell development and growth takes place. From there, the cells enter the S phase where DNA replication/synthesis takes place. The cells then enter the G_2 phase where proteins are synthesized in preparation for division or m phase.

At the S phase, the amount of DNA a cell carries is doubled but the chromosome number remains the same. For example, if a cell enters the S phase with 2 g of DNA containing 10 chromosomes, at the end of S phase, the amount of DNA would have come 4 g while the number of chromosomes will remain 10.

Hence, if the average amount of DNA in the assayed cells immediately after mitosis is 4 picograms, the amount would be 8 picograms at the end of S phase and will still remains 8 picograms at the end of G_2 phase.

The correct option is b.

8 0
2 years ago
Pepsin is an enzyme found in the human stomach that breaks down protein. Pepsin will not break down starch.
Andre45 [30]

The statement which best explains why Pepsin will not break down starch is that enzymes only work for specific substrates.

<h3>What is an Enzyme?</h3>

This is referred to as a biological catalyst which helps to speed the rate of chemical reaction in the body by lowering the activation energy needed to start it up. it is also proteinous and can be denatured by heat and other substance such as chemicals.

They are also substrate specific which means they can't act on any type of substance. For example enzyme such as amylase acts on only starch while pepsin acts on only protein.

Read more about Enzyme here brainly.com/question/1596855

#SPJ1

brainly.com/question/28215908

5 0
11 months ago
Other questions:
  • Explain how climate and temperature can affect the behavior of individuals.
    11·2 answers
  • What is the texture and consistency of the dna? 2. why did we use a salt in the extraction solution? 3. is the dna soluble in th
    10·1 answer
  • The breast-shaped projection on the temporal bone that provides anchoring sites for neck muscles is called the . Each rib articu
    5·1 answer
  • Discuss the relationship between food webs and trophic levels.
    9·1 answer
  • A study was conducted in men aged 40-70 in order to determine whether exercising for 2 or more hours per week decreases the like
    8·1 answer
  • Earth's axis of rotation is almost parallel to the plane of its orbit. Please select the best answer from the choices provided T
    5·2 answers
  • Use the Transcription Translation interactive to answer the question. Arrange the amino acids coded for in the translation porti
    6·1 answer
  • According to the pressure-flow hypothesis, what mechanism causes the movement of phloem sap from sources to sink tissues? See Se
    5·1 answer
  • Please help it’s urgent!!!!
    5·1 answer
  • A description of the three topics, concepts, or theories you learned about in the module that you consider most important; choos
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!