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
Digiron [165]
3 years ago
8

Sally wants to know why the leaves of her plants are turning yellow. She suspects it is because the plants are not receiving eno

ugh nutrients. To test her hypothesis, she devises the following experiment.
First, Sally obtains four identical green plants. Then, she places each plant in separate, but identical pots, with the same type and amount of soil. Although Sally gives each plant the same amount of water and Sun exposure each day, she changes the amount of fertilizer placed in each pot. Finally, she records the number of yellow leaves that she sees in each pot every day over the course of one month.

What is the dependent variable in Sally's experiment?
A.
the number of yellow leaves
B.
the type of green plant
C.
the amount of water
D.
the amount of fertilizer
Biology
2 answers:
OleMash [197]3 years ago
7 0

The correct answer is option A, that is, the number of yellow leaves.  

An independent variable refers to the variable, which is monitored or modified in a scientific experiment to examine the influences on the dependent variable. A dependent variable refers to the variable being measured and examined in a scientific test. Hence, in the given case, the number of leaves getting yellow is a dependent variable.  

Both the dependent and the independent variables may be observed in terms of the cause and effect.  


Jlenok [28]3 years ago
6 0
<h2>Answer:</h2>

The correct answer is option A which is the number of yellow leaves.

<h3>Explanation:</h3>
  • In mathematics modeling , or statistical analysis or in scientific experiments a n independent variable is considered as the input of experiment and it can be changed depending upon the protocols.
  • Dependent variable is the out put of the experiment, that depends upon the independent variable.
  • In the above experiment, sally wants to know about the number of yellow leaves upon changing the fertilizer amount. So input means yellow leaves are dependent variable.
You might be interested in
Suppose you run a regression of a person’s height on his/her right and left foot sizes, and you suspect that there may be multic
zvonat [6]

Answer:

D: All of these options

Explanation:

The p-values for the coefficients indicate whether these relationships are statistically significant.

A low t value shows that your hypothesis is true

Multicollinearity means when independent variables in a regression model are correlated.

7 0
3 years ago
the study of injury biomechanics in crash testing has helped us learn what happens to the human body in passenger car crash true
german

Answer:

The study of injury biomechanics in crash testing is true because they use test dummies

6 0
2 years ago
after being bit by a poisonous snake, jacob was treated with an injection of an antiserum produced by immunizing a horse or shee
brilliants [131]

T cells and B cells are the two main cell types that are crucial to the efforts of the adaptive immune response, in addition to cytokines and APCs.

<h3>Passive immunity is conferred by which of the following?</h3>

By supplying antibodies or lymphocytes that have already been produced by an animal or human donor, a vaccination may also impart passive protection. Most vaccines are administered parenterally (by injection), although some can also be taken orally or even nasally (in the case of flu vaccine).

Monoclonal antibodies search for and bind to the spike protein that protrudes from the coronavirus that causes COVID-19 after they have entered your body. Monoclonal antibodies that bind to the spike protein can prevent the virus from entering cells, slowing the infection.

The endothelial cell glycocalyx, which serves as a molecular sieve, and pressure gradients in the capillary beds both affect how lymph fluid is formed. toward with fluid propulsion

To learn more about Passive immunity refer to:

brainly.com/question/15255230

#SPJ4

6 0
1 year ago
The density of the rock known as granite is 2.7 grams per cubic centimeter.
emmainna [20.7K]

Answer:c

Explanation:

7 0
3 years ago
This method can be used to sterilize a liquid media without
Lena [83]

Answer:

a. autoclaving

Explanation:

The autoclave is a device designed to sterilize contaminated material and media, in order to reliably eliminate microorganisms that would otherwise be present in objects that are used in diagnostic, treatment or research activities in hospitals and laboratories health institutions . This sterilization is usually carried out with moist heat in devices called autoclaves. It is also a widely used equipment in the food industries and in the pharmaceutical industry.

For sterilization of culture media to be effective, the selected temperature and time must be achieved throughout the liquid. Since the transmission of heat in the liquid of the vessels is carried out from the outside inwards, it is evident that the efficiency of the process will depend on the volume of liquid.

In general, it is not convenient to sterilize large and small containers together. In any case, the temperature and time will be selected according to the volume of the containers.

Hermetically sealed containers must be introduced into the autoclave without completely closing the cap, to facilitate the entry of steam during the process. When emptying the autoclave after sterilization we will proceed to completely close these containers.

Empty containers require a longer sterilization time than containers with liquid inside.

The autoclaves are available in many sizes, the small ones are desktop and the larger ones are complex equipment that require a large amount of pre-installation for their operation. In order to measure its size, the volume of the sterilization chamber is usually taken as a reference, which is measured in cubic centimeters or liters. Depending on their operation they are semi-automatic or automatic.

8 0
3 years ago
Other questions:
  • This the period during the cell cycle between the DNA replication and mitosis. Chromatin condense into chromosomes and the chrom
    11·2 answers
  • Donna is concerned about her adolescent daughter's tendency to flare-up at the mildest provocations. Donna says that her daughte
    15·1 answer
  • Know the 3 basic types of water pollution and be able to identify examples of each.
    6·1 answer
  • Which of the following best describes how a blood cell and skin cell have the exact same DNA sequence and yet look different and
    5·1 answer
  • The production of pink flowered plants from a cross between a red flowered plant and a white flowered plant is an example of​
    8·2 answers
  • A cell's organelles are suspended within its _____.
    11·1 answer
  • Please help me. &lt;&gt;&lt;&gt;&lt;&gt;&lt;&gt;&lt;&lt;&gt;
    9·1 answer
  • Explains how the atoms that make up glucose can be used to construct macromolecules
    14·1 answer
  • Please help me with this​
    14·2 answers
  • Which organelle is labeled H???
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!