A double-blind, randomized study is being used to test the effectiveness of a new drug that targets the multi-drug resistant bacterium Clostridium difficile. Infected participants in the study were given either a placebo or the test drug and then monitored for one month for clearance of infection. This type of study can best be characterized as a(n)_________________.
A. observational study
B. cross-sectional study
C. Correlation study
D. experimental study

Answers

Answer 1

the answer is c. correlation study


Related Questions

Organisms that do not have a membrane-bound nucleus are called:.

Answers

Answer:

Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.

Because their role is to move the eyeball, all of the extrinsic eye muscles have insertions on the ______.

Answers

The Answer is Sclera.

Explain. How mitotic cell division results in more cells that allow growth of the organism, can differentiate to create different cell types, and replace dead cells to maintain a complex organism.

Answers

Answer:

The mitotic cell division results in more cells that allow growth of the organism because of mitosis. Mitosis is when a single cell divides into two identical daughter cells. The major purpose of mitosis is for growth and to replace worn out cells.

hope this helps :)

Explanation:

TWO FUNCTIONS OF CELL DIVISION FOR MULTICELLULAR ORGANISMS AND GIVE AN EXAMPLE FOR EACH FUNCTIOM

Answers

Answer:

Two functions of a cell, which are involved in the cell division are: Nucleus – It is the control centre of the cell. Chromosomes are present inside the nucleus.

EXAMPLE:  Nuclear membrane disintegrates during division and reforms after the division.

Explanation:

mutations!
1. Mutations are changes in DNA which can sometimes change the DNA
I
2. Mutations can be
or be caused by exposure to harmful
or
Anything in the environment that can cause a mutation is called a
3. Only mutations in
(egg and sperm) can be passed on
Type of mutations
4
mutation is when a base is
or substituted with another base.
5. A
mutation is a deletion or addition of one or more bases that changes how you
the message
6. A deletion is when a base is
and an addition is when a base is
7. If you change the DNA or RNA code it can change the
and
Mutations can be good, bad or have no effect.
8. Good example: Bacteria that are
to our drugs
9. Bad example:
anemia and
cancer
Click to add speaker notes
cms
S
US 1:04

Answers

Answer: TYSM!!! FOR HELPING PEOPLE!

Explanation: UR GREAT AT THIS STUFF :) sorry lol its in caps

what properties DO NOT require a tool?
1. Cleavage
2. Hardness
3. Luster
4. Carbonate Content ​

Answers

Answer:the correct answer is luster

Explanation:took the quiz made a 100

a reflected light glow: sheen specifically: the appearance of a mineral's surface dependent on its reflecting qualities the luster of polished metal

What does it mean by luster?a reflected light glow: sheen specifically: the appearance of a mineral's surface dependent on its reflecting qualities the luster of polished metal The luster of the stars: a glow of light from within. b: radiance is an inner beauty.Glossy paper is extremely shiny, whereas lustre paper is semi-shiny. Glossy prints have more vibrant colors. A lustrous finish, on the other hand, reveals more accurate skin tones. A lustrous finish is also less susceptible to fingerprints, smudges, and scratches.

To learn more about : Luster

Ref : https://brainly.com/question/4701542

#SPJ2

what are the levels of organization in a living thing

Answers

Answer:cells

Explanation:cells

What occurs during the latent period of these isometric contractions.

Answers

Answer:

The latent period refers to the period of time, in which no force is generated, that elapses between the generation of an action potential and the beginning of muscle contraction. The contraction phase begins at the end of the latent period and ends at the peak of muscle tension.

Explanation:

:)

During the latent period of isometric contractions, there is no visible change in muscle length. It is the time period between the initiation of a stimulus and the actual start of muscle contraction.

Here is a step-by-step explanation of what occurs during the latent period:

1. The stimulus is received by the muscle fiber, either from a motor neuron or an electrical impulse.
2. The stimulus triggers the release of calcium ions from the sarcoplasmic reticulum.
3. Calcium ions bind to troponin, causing a conformational change in the troponin-tropomyosin complex.
4. This conformational change exposes the binding sites on actin for myosin heads.
5. ATP is hydrolyzed by myosin, providing energy for the myosin heads to bind to actin.
6. Cross-bridge formation occurs, where myosin heads attach to actin filaments.
7. However, during the latent period, there is no visible shortening or movement of the muscle fiber.
8. This is because the force generated by the myosin heads is balanced by an opposing force within the muscle, preventing any visible movement.
9. The opposing force is created by the tension in the series elastic elements of the muscle, such as the tendons and connective tissues.
10. This tension allows the muscle to maintain a stable position and prepare for the upcoming contraction.
11. The latent period typically lasts for a few milliseconds, depending on the type of muscle and the intensity of the stimulus.
12. After the latent period, the muscle enters the contraction phase, where the myosin heads continue to bind and detach from actin, causing muscle shortening and generation of force.

In summary, the latent period of isometric contractions is the time between the stimulus and the start of visible muscle contraction. During this period, the muscle prepares for contraction by releasing calcium ions, allowing myosin to bind to actin. However, there is no visible movement because the force generated by the myosin heads is balanced by an opposing force within the muscle.

To know more about isometric contractions:

https://brainly.com/question/14486229

#SPJ6

Emerging viruses that infect human cells can originate from __________. View Available Hint(s)for Part A poor hygiene a rapidly mutating lytic phage lambda viruses that were previously confined to bacterial populations that can now spread due to technological changes a virus spreading from one host species to humans

Answers

An emerging virus result from a rapidly mutating lytic phage lambda viruses that were previously confined to bacterial populations that may from technological changes.

What are emerging viruses?

An emerging virus refers to an entirely new virus that does not have a previous record of infections in the past. In short, an emerging virus is a novel virus.

One of the possible origins of an emerging virus is a rapidly mutating lytic phage lambda viruses that were previously confined to bacterial populations that can now spread due to technological changes.

Learn more about viruses: https://brainly.com/question/3122852

1. Which property allows water to remain in liquid form at high temperatures?
A. Density
B. Polarity
C. Surface Tension
D. Electrical Conductivity

Answers

Answer:

polarity

Explanation:

Name the system- name as many human body systems as you can. ( don’t use internet)

Answers

Answer:

integumentary

circulatory

nervous

lymphatic

skeletal

muscular

Explanation:

im so sorry this all i know from the top of my head

2. Make separate shopping lists for 2
meals that are low in sugar and saturated fat.

Answers

Answer:

cheesy scrambled eggs:

carton of eggs

salt

pepper

fat free cheddar cheese

non fat cooking spray

fat free margarine

sugar free whole wheat bread

chicken pasta salad:

fusilli

olive oil

red wine vinegar

Tabasco

red onion

cherry or baby plum tomatoes

chicken breasts

basil Explanation:

Marcie is writing an article on the Big Bang Theory. What fact should she include in it? A. The universe started expanding after the Big Bang. B. The universe started shrinking after the Big Bang. C. The universe coalesced into one solar system after the Big Bang. D. The universe ended at the Big Bang.

Answers

Answer:

C. The universe coalesced into one solar system after the Big Bang.

Explanation:

This is true because, since she is writing about Big Bang theory, she would have to include how the universe was able to expand to one solar system made up of different planetary bodies. This explanation would help someone reading her writeup to understand what the Big Bang theory is all about.

Answer:

C

Explanation:

The correct answer is (C) because Marcie has the simple information but she is missing how the the (Big Ban) happened

One recent approach to vaccine development has been production of peptide vaccines. In these vaccines, antigenic peptides are injected instead of whole bacteria or viruses. Peptide vaccines have not been particularly useful against viral pathogens because viral infections require a CD8+ T cell mediated immune response. Why is a peptide vaccine unable to create such a response?

Answers

Answer:

Explanation below

Explanation:

Immunization is the process of protecting the body from infections. This can be divided into two, namely

1. Natural immunization

2. Artificial immunization

Natural immunization is the one that is being developed by the body naturally, to protect the body from infections. This is usually known as the white blood cells.

Artificial immunization is being developed through the introduction of atenuated organisms into the body, so that the body can react by producing antibodies against that infectious organisms. This is known as vaccination.

The peptide vaccines have been developed for the body to be able to produce antibodies against some infections.

It should be noted that, owing to the relatively small size of peptides, they are often weakly immunogenic by themselves and therefore require carrier molecules, to add chemical stability and adjuevating for the induction of a robust immune response.

can someone explain what the questions mean i will mark brainliest

Answers

Answer:

What happened during the growth of your seedling to effect how it has grown?

What kind of energy (sun-light, water, soil nutrients) contributed to the growth and development of your seedling?

Explanation:

This is how I interpret what the question means. I hope this helps.

WILL MAKE BRAINLIST IF CORRECT HELP FAST PLEASE 20 POINTS!!!! Which soil is made of 25% sand 25% silt and 50% clay?

Answers

Answer: loam sandy

Explanation: sandy loam is a type of story is used for gardening this we were typing is normally made up of sand along with getting them out of silt and clay

The soil which is made up of 25% sand, 25% silt, and 50% clay is known as loamy soil.

What are the characteristics of soil?

The characteristics of soil are as follows:

Soil is typically composed of organic matter and small inorganic matter.It is significantly composed of minute rock fragments and is the roughest in texture. It possesses a broad characteristic of texture, structure, porosity, chemistry, and color. It generally consists of air, water, and moisture.

According to the context of this question, the loamy soil significantly consists of 25% sand, 25% silt, and 50% clay. This is because it is the only soil that possesses a mixture of sand, clay, and silt.

Apart from this, it also consists of 50% pore spaces and water. The presence of an equal amount of soil particles of various sizes imparts enough pores to loamy soil to facilitate water drainage.

Therefore, the soil which is made up of 25% sand, 25% silt, and 50% clay is known as loamy soil.

To learn more about Loamy soil, refer to the link:

https://brainly.com/question/4539121

#SPJ2

What would happen to the plant population if the caterpillar population decreased?

Answers

It would increase because it has 1 less thing that eats it

Answer:

it was increase

Explanation:

Which tool is used to detect yellow light rays emitted by stars from outer space?

Answers

Answer:

the Hubble space telescope

Explanation:

how much food is required for a blob to reproduce from one generation to another

A: 1
B: 2
C: 3
D: 4

Answers

Answer:

Reproduction is achieved from a single cell type, if the organism itself consists of many cell types because each cell that reproduces has a similar DNA in an organism.

A blob to reproduce from one generation to another is option "A" which is 1.

Reproduction is achieved from a single cell type if the organism itself consists of many cell types because each cell that reproduces has a similar DNA to an organism.

What is reproduction in living things?

Reproduction occurs when an organism makes a copy of DNA and produces offspring. All living things on Earth are a process of reproduction.

Thus,  option "A" is 1.

To, learn more about reproduction click here:

https://brainly.com/question/7464705

what type of restriction enzymes are used in genetic engineering to mend DNA segments together ?

Answers

DNA ligase



Many restriction enzymes make staggered cuts, producing ends with single-stranded DNA overhangs. However, some produce blunt ends. DNA ligase is a DNA-joining enzyme. If two pieces of DNA have matching ends, ligase can link them to form a single, unbroken molecule of DNA.

can i get some help on this please ​

Answers

I think it’s b because I had this on a test before so just try b❤️
I believe it is b hope this helps

The single largest threat against a river ecosystem is ___________.
a) pollution
b) silt
c) muttering
d) ransom
e) estuary

Answers

Answer:

a) pollution

Explanation:

Multiple environmental stressors, such as agricultural runoff, pollution and invasive species, threaten rivers that serve 80 percent of the world's population. These same stressors endanger the biodiversity of 65 percent of the world's river habitats putting thousands of aquatic wildlife species at risk.

The obvious answer is Pollution. Hope this helped!

NEED HELP!

Why would the shrimp in the ecosphere die if there was no sunlight?

Answers

Answer:

The shrimp would die wthout sunlight because they eat algae and algae live on the water's surface. Algae undergo photosynthesis and for photosynthesis to occur, sunlight is necessary. If there is no sunlight, there is no algae. And without the algae around the shrimp no longer have anything to eat. Therefore, without the sunlight (and algae) the shrimp will not be able to survive.

Explanation:

^

If two organisms have similar rrna sequences, you can conclude that they.

Answers

Answer:

evolved from a common ancestor

Explanation:

If two organisms have similar rRNA sequences, you can conclude that they: evolved from a common ancestor.

Hope it helps!!!Brainliest pls!!!

Which lists three living units of the human body in order from the simplest to the most complex level of organization?

A. red blood cell → circulatory system → blood
B. nervous system → nerves → brain
C. red blood cell → heart tissue → circulatory system
D. bone tissue → skeletal system → bone

Answers

Answer:

C

Explanation:

Cell to tissue to organ to organ system to organism

Answer:

The correct answer is

(B.) nervous system → nerves → brain

Explanation:

The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.

Hope this helped you!If it did ,hit that BRAINLIEST button!

Golgi apparatus meaning

Answers

Answer:a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transpor

Explanation:

Answer:

a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.

happy to help

Explanation:

do you think you can answer this?​

Answers

84.798 is the mass number

You have learned about how to sample a population and estimate size from density. In this
activity, you will: construct a model of a population, sample the population to determine its
density, then use its density to determine its size.
Part One: Construct the Model
Materials
1 piece of 8.5 by 11 in. letter paper
1 pen or pencil
1 ruler
50 small dry beans or other small objects such as buttons
1 small cup
Directions:
1) Use your pen or pencil and ruler to divide the paper into four equal sections.
2) Place the 50 beans into a small cup.
3) Scatter the beans as evenly as possible over the entire paper, making sure to get some of
the beans into each section.


Student Name:
Modeling Population Size
Part Two: Use the Model to Estimate the Size of the Population
In your model, each bean represents a starfish and the paper represents its ocean floor habitat.
1) Within the habitat, choose one of the four sections and count the number of starfish in that
section.
2) Use your ruler to measure the dimensions of the section you chose and calculate the area
that you sampled.
3) Calculate population density based on your sample.
4) Use your ruler to measure the dimensions of the entire habitat and calculate the total
habitat area.
5) Use your calculated population density and total area to estimate total population size.
6) Compare this estimation to your known population size (50). Did you under‐ or
overestimate based on your sample?

Answers

the answer will be 4

please help! will give brainliest :))

Answers

Answer:

#A

Explanation:

Answer:

A, D, B

Explanation:

All have layers protecting the inside.

Which kingdom has members that lack major organelles such as endoplasmic reticulum, mitochondria and Golgi bodies?

A) Bacteria
B) Protist
C) Fungi
D) Plantae

Answers

Answer:

A, Bacteria

Explanation: Prokaryotic bacteria are very simple and lack organelles like ER, mitochondria, Golgi, etc.

Other Questions
How did the musical Oklahoma! change musical theater? PLEASE HELP!!! A school has 3 tons of gravel to bespread over the playground. Themembers of the landscaping crewcan move 80 pounds of gravel in eachwheelbarrow load. How many wheelbarrow loads will it take to move all the gravel? Which of the following is directly involved intransforming the remains of organisms intofossil fuels?A. pressureC. sunlightB. windD. precipitation Directions: This group of questions consists of five lettered headings followed by a list of phrases or sentences. For each phrase or sentence, select the one heading to which it is most closely related. Each heading may be used once, more than once, or not at all This group of questions refers to molecules of the following substances. (A) Cytochrome (B) FADH2 (C) NAD (D) NADP (E) Oxygen order the numbers from least to greatest 8.062, 8.26, 8.026, 8.6 And angle measure 88. 2 more than a measure of is complimentary angle what is the measure of each angle what dose the term "life story"means ANSWER THIS QUICK FOR BRAINIEST WHAT DO YOU THINK CAMEL DID WHEN DJINN LEFT Which of the following are NOT SAFE things to do, as we might get an electric shock? 1) Touching the switch of a geyser with dry hand. 2) Standing on a wooden stool to check a plug point. 3) Poking a metal rod into an electrical socket. 4) Touching the water in which an immersion heater is kept. An electromagnetic wave traveling through a vacuum has a wavelength of 1. 5 101 meter. The period of this electromagnetic wave is A subcontinent is???????? Solve the equation for z.-2z + b = h How are parallelograms and rectangles similar and how are they different?. Choose the answer that is hyphenated correctly.twenty-nine years of agePre-testInternationally-known cellist A school sells pizza slices at the concession stand during each sporting event. The school sells a mean of200 slices per event with a standard deviation of 25 slices.The school spends $160 of fixed costs to buy the pizza before the event and earns a revenue of $2 perslice. They calculate their profit per event according to this formula:profit(total revenue) (total costs]What will be the mean and standard deviation of the distribution of profit per event? answer pls i need help Which of the following would be a good name for the function that takes the pages in a reading assignment and returns the time needed to complete it? A. Time(pages) B. Cost(time) C. Time(cost) D. Pages(time) E. Year(time) F. Time(year) SUBMIT < PREVIOUS in short easy answer pls! Venice was an extremely cosmopolitan city, where many different ethnic and religious groups practiced ________and integrated intothe larger society. *a) assimilationb) iconoclastc) bombastd) replete