Answer:
An experiment where an antibiotic is tested against bacteria. The antibiotic can vary in its concentration for example, different amounts are applied to a sample of bacteria to see if it is affected by the action of the antibiotic and if so, in what concentration. So, the independent variable is the concentration of antibiotic while the dependent variable is the survival (or not) of the bacteria.
Explanation:
An independent variable is a variable that represents a quantity that the scientist modifies in an experiment. A dependent variable represents a quantity whose value depends on how the independent variable is modified. This is the variable being studied and measured.
So, an example of this applied to bacteria or viruses could be:
An experiment where an antibiotic is tested against bacteria. The antibiotic can vary in its concentration, different amounts are applied to a sample of bacteria to see if it is affected by the action of the antibiotic and if so, in what concentration. So, the independent variable is the concentration of antibiotic while the dependent variable is the survival (or not) of the bacteria.
To complete the experiment, an antibiotic whose effect is already known can be used as a positive control. That is, it is already known to kill the bacteria. And as a negative control you can simply use water, which has no effect and is known not to kill the bacteria. In this way, we validate the results and make sure that there is not something else that is affecting the bacteria and that only the antibiotic being studied has an influence.
how many cells are in each phase and whats the percent of the cells
how does the cell work
Which of the following has to
occur in order for mammals to
create offspring?
A. fertilization
B. self-reproduction
C. mutation
D. self-fertilization
Four differences between viruses and bacteria
Answer:
bacteria :
1. need microscope to see them.
2. need warmth moisture nutrients.
3. saprophyte or parasite.
4. can be harmful or useful.
viruses:
1. smaller than bacteria.
2. spend on living host.
3. always parasite.
4. where is harmful.
Super easy. Please help
Answer:
Identical twins tend to be more similar to each other than fraternal twins do.
Explanation:
Can some one help???
Answer:
what is it you need
Explanation:
In a sex linked trait, the recessive phenotype is most often found in males because...
Answer:
X-linked recessive diseases most often occur in males. Males have only one X chromosome. A single recessive gene on that X chromosome will cause the disease. The Y chromosome is the other half of the XY gene pair in the male.
Explanation:
Why are you learning this stuff anyways.Girl????????
Choose which statement best describes an element.
A. Anything that takes up space
B. A pure substance that cannot be broken down into other substances by chemical means.
C. Water
D. Atom has a nucleus with neutrons and protons in it.
Answer:
B
Explanation:
Elements are pure substances that cannot be broken down into other substances by chemical means .
B cells can divide to form plasma cells. Each plasma cell contains many mitochondria
and an extensive endoplasmic reticulum. Referring to the function of plasma cells in your answer, explain why these features are important adaptations.
Answer:
Explanation:
The presence of mitochondria and an extensive endoplasmic reticulum are the features that are important for adaptations of the plasma cell because plasma cells (white blood cells) secrete immune proteins also called antibodies which only formed due to the presence of endoplasmic reticulum whose function is to formed proteins for the cell so that's why plasma cells have large sized endoplasmic reticulum.
Water, ice, wind, sand, and chemicals are constantly crumbling mountains, flattening hills, widening valleys, and deepening canyons. __________________ never stops
Answer:
erosion
Explanation:
What does the prefix pseudo mean in the word pseudoscience?
false
subjective
systematic
factual
Hii!!! I believe the answer is A. False. (:
Help!! Please!! I'll name you brainliest!!
Explanation:
the same as the charge on the ion.+1 +2-25. -1
plz mark my answer as brainlist plzzzz you get it helpful ☺️.
Hope this will be helpful to you.
which part of the eye is sensitive to light?
Which part of the eye is sensitive to light?
Retinasorry kalo salah
To ligth The sensitive of teh eye
Despite his fear of germs, Howard Hughes neglected his own hygiene despite having those around him follow strict cleanliness practices. Hughes had these odd behaviors because __________.
A.
he believed he was unable to escape any infection
B.
he developed obsessive-compulsive disorder at an old age
C.
he thought he would be contaminated from the outside
D.
his paralysis at a young age prevented him from being self-sufficient
Answer: it’s c he thought he would be contaminated from the outside
Explanation:
I took the test
Howard Hughes neglected his own hygiene despite having those around him follow strict cleanliness practices. Hughes had these odd behaviors because he thought he would be contaminated from the outside.
What is importance of cleanliness?Cleanliness gives rise to a good character by keeping body, mind, and soul clean and peaceful. The cleanliness only which helps to improve our personality by keeping clean externally and internally.
Thus, option "C" is correct.
To learn more about cleanliness click here;
https://brainly.com/question/4279403
2. What can you infer from the fact that ants make up
20 percent of the mass of all land animals combined?
a. Ants are very heavy
b. Ants live for a long time
c. Ants thrive in locations all over the world
d. Ants breed faster than any other organism on earth
Ant breed faster than any other organism on earth, 20% of earth mass have land animals. Many ants are on the earth. Thus, option D is correct.
What are the major features of ants ?Ants belongs to Formicide family which is related to so called eusocial insects like bees and termites. It is appeared in the Cretaceous period that is more than 90 million years ago.
The diversity of ants is every where except Antarctica.
The body has three parts such as a head, a meso-some and metasoma or gaster.
Ants are mostly omnivorous but can be scavengers , predators or herbivores based on ecological context.
The reproduction in which young, queens fly during mating time, fertilize with male, this flight is called as nuptial flight.
Then queen lay eggs, then larvae emerge to become pupae, then adults such as workers, soldiers, males or other queens are produced.
Thus, option D is correct.
Learn more about ants, here:
https://brainly.com/question/932986
#SPJ2
When organisms
they increase in size.
Answer:
The increase in size and changes in shape of a developing organism depend on the increase in the number and size of cells that make up the individual. Increase in cell number occurs by a precise cellular reproductive mechanism called mitosis.
Explanation:
Put "Sympatric Speciation" in a sentence
Answer:
A 2008 study suggests that sympatric speciation has occurred in Tennessee cave salamanders.
Explanation:
Hope this helps
Which of these contributes the most oxygen to our planet?
a. Photosynthetic fungi
b. The Amazon Rain forest
c. the National Forests
d. Phytoplankton
Answer:
D. Phytoplankton
Explanation:
The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize.
Have a wonderful day! <3
Answer:
D
Explanation:
this is because the ocean produces the most oxygen and most of that comes from plankton in the ocean
I need help on these questions please.
what is the relation between cell cycle disruption and cancer?
I need help!!!?
Help me really quick please
Answer:
a
Explanation:
potential energy is highest at its highest point
DNA fingerprint can be obtained from… (check all that apply)
Answers:
the pattern on a finger
hair with follicle attached
skin
blood
hair with no follicle attached
Answer:
Did u really delete mine so u can get credit wow you're crazy
Explanation:
Give advantages and disadvantages of asexual reproduction.
Answer:
Advantages and Disadvantages Of Asexual Reproduction
Advantages Of Asexual Reproduction Disadvantages Of Asexual Reproduction
The process requires less energy. Since the offspring is an exact copy of the parent, any negative mutation will also pass on to the offspring
3. What two paths can a cell take after it has grown?
Answer:
Explanation:In eukaryotic cells, or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase.
the nose produces a sticky material called mucus, which is moistens the air and traps particles true or false
Answer:
True
Explanation:
It traps the particles and stops them from reaching your lungs and harming them.
What happened at point B? Why?
Answer:
population has decreased over that period ,MAyBe
Explanation:
I don't know why
Type Newton's Second Law of Motion as it is written.
Answer:
I hope you understand please give brainliest
Explanation:
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Answer:
Yes it is written that second law of Newton is motion of an object
PLS HELP ASAP!!!!!!!
Answer:
3. A and B are true
4. oxygen, photosynthesis, I think oxygen, cellular respiration
Explanation:
Hope this helps! :) I am think all of my answers are correct.
In this food web, birds would be classified as
A)
carnivores.
B)
decomposers.
herbivores.
D)
omnivores.
Answer:
D) omnivores.
Explanation:
The bird consumes both plants and arthropods
Answer:
omnivores
Explanation:
omnivorous consumers. they eat other animals like snails and worms but they also eat berries.
Twenty years after his voyage to the Galapagos, what did Darwin identify as the creative force driving the evolution of species?
Darwin discovered many animals but he observed finches(a type of bird) with unique beaks.