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
True [87]
3 years ago
15

During the development of a new drug, which would be included in the study by the researcher to prevent any bias or unrealistic

expectations of the new drug's usefulness?
A. A placebo
B. FDA approval
C. Informal consent
D. Efficacy information
Biology
1 answer:
lord [1]3 years ago
4 0

Answer:

Option-A

Explanation:

In the given question, since the examiner has mentioned the time that the factor the researcher should include during the development of a new drug is "the placebo". A placebo is used during the experiment as control by and its effect depend on the expectations of the patient since the placebo does not contain the active drugs.

The FDA approval, informed consent and the information are not used until the study is going on.

Thus, Option-A is the correct answer.

You might be interested in
⦁ Está constituido mayoritariamente por agua; diferentes moléculas orgánicas, como carbohidratos; y moléculas inorgánicas, como
Marina86 [1]

The question is in another language so, English translation for the given question is as follows:

It is made up mostly of water; different organic molecules, such as carbohydrates; and inorganic molecules, such as mineral salts. It carries out most of the chemical reactions of the synthesis of molecules and obtaining energy. To which of the following cell structures does the above description correspond?

a) Nucleus. b) Genetic material. c) Cytoplasm. d) Cell membrane.

Answer:

c) Cytoplasm

Explanation:

The Cytoplasm is defined as a thick solution filled inside each cell and all the organelles float in the cytoplasm.

The Cytoplasm is majorly made up of water, carbohydrates, salts, and proteins. Cytoplasm contains different molecules and enzymes that carries out most of the chemical reactions and obtain energy. Cytoplasm also helps in providing shape to the cell.

Hence, the correct option is c) Cytoplasm.

6 0
3 years ago
Describe the general flow of energy through an ecosystem beginning with the Sun and going through a third order consumer.
Illusion [34]

Answer:

1) Autotrophs transform solar energy into chemical energy.

2) Herbivores and omnivores (primary consumers) eat producers, make use of some of the energy, making from it their biomass.

3) Following, carnivores or predators (secondary, tertiary, and other consumers) eat herbivores, using only 10% of the flowing energy.

4) Decomposers (last order in the chain) recycle all the dead organic material and make use of some of the stored energy.  

Explanation:

<u>Energy flow: </u>From the whole quantity of energy that reaches the earth's surface, only 0.1 or 1% is absorbed by autotroph organisms or producers.  

From this input of solar energy, it begins a unidirectional energy flow through all the organisms in the ecosystem, from autotrophs to heterotrophs, until it is finally dissipated in the environment.  

Organisms that can use light, and turn it into organic matter according to their own needs are producers, and they are called autotrophic organisms. These organisms are by excellence all plants, algae, and bacteria that photosynthesize. Organisms that are incapable of producing their food are called heterotrophic. They depend on other organisms from the trophic chain such as plants or other animals to feed on, so they can get proteins and energy.  In the trophic web, heterotrophic organisms occupy the first, second, or third consumer level, after producers.  There are different types of heterotrophic animals: carnivorous, herbivorous, omnivorous, hematophagous, ichthyophagous, and etcetera. All of them depend on autotrophic organisms.

At each trophic level, it occurs an energy transfer from one level to the next, with only 10% being usable in each of them. This assessment is called <u>"The 10% rule".</u> This is, as a general rule, only about 10% of the energy stored as biomass at one trophic level, per unit time, ends up as biomass at the next trophic level, in the same unit of time.

The progressive reduction of energy determines the number of trophic levels in the chain (4 or 5).  

1) Autotrophs use water, CO2, and solar energy to produce O2 and glucose, by the process of photosynthesis and convert it into biomass. Producers transform solar energy into chemical energy.

2) Herbivores and omnivores (primary consumers) make use of some of this energy to survive, making from it their biomass. The rest of the energy is lost.

3) Following, carnivores or predators (secondary, tertiary, and other consumers) eat herbivores, using only 10% of the flowing energy. The rest of the energy is lost.

4) When different organisms die, decomposers (last order in the chain) recycle all the organic material and make use of some of the energy stored in their tissues. The rest is lost.

4 0
3 years ago
Look at the energy pyramid shown in the lesson. Suppose a trout eats a smelt and then a human eats the trout. About how many of
pav-90 [236]

Answer:

i got 187.2 i think

Explanation:

7 0
3 years ago
Which factors in this image are biotic? Check all that apply. bears water plants rocks sunlight birds
MAVERICK [17]

Answer:

Bears, Plants, and Birds

Explanation:

Just took the quiz

4 0
3 years ago
Read 2 more answers
If you touch a car window with no tint on a semi-sunny day and it feels warm what is most likely occurring?
erica [24]
D. The heat is there via convection from the sun
3 0
3 years ago
Read 2 more answers
Other questions:
  • Entities involved with the body’s immunity?
    8·1 answer
  • Why do scientists think the fossil record is incomplete?
    8·1 answer
  • PLEASE HELP! ASAP! FIFTEEN POINTS!
    11·1 answer
  • What is the structure in the cell that controls all of the cells activities
    10·2 answers
  • Your dog licked the last of your spaghetti off your plate. Why might you wash it in bleach water? (Remember to refer to bacteria
    9·2 answers
  • Which of the following is not a specialized epidermal cell?
    9·1 answer
  • (free brainliest) Why don't birds get electrocuted when they land on an electric wire?
    9·2 answers
  • Give one example of a bad mutation and one example of a good mutation.!
    10·1 answer
  • Respiratory pigment​
    9·1 answer
  • Help<br><br> Explain how cellular respiration and photosynthesis make a system together.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!