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
vichka [17]
3 years ago
6

There are many different types of scientific investigations. Which of the following forms requires the identification and contro

l of variables?
A.
model-building
B.
observational field studies
C.
collection of specimens
D.
laboratory experiments
Biology
1 answer:
ludmilkaskok [199]3 years ago
4 0

D) laboratory experiments because every experiment needs a control and a variable.

You might be interested in
Why have plants evolved ways to prevent self-fertilization? Why do you cross-fertilization (plant to plant) more beneficial to t
aliya0001 [1]
It might be because making it a hybrid could help get nutrition and other things it needs. I don't know exactly though

8 0
3 years ago
Neurotransmitters can affect postsynaptic cells by I) initiating signal transduction pathways in the cells II) causing molecular
Yakvenalex [24]

Neurotransmitters can affect postsynaptic cells by causing molecular changes in the cells.

The term "chemical messengers of the body" is frequently used to describe neurotransmitters. The nervous system uses these molecules to send information between neurons or from neurons to muscles. A neurotransmitter influences a neuron in one of three ways: excitatory, inhibitory or modulatory.

When a stimulus is potent enough, the chemical messenger neurotransmitter is transferred into the nerve impulse. If it is powerful enough, it will reach the postsynaptic cell and affect the structure of the neuron. And when signal transduction happens, everything mentioned above is completed.

To know more about neurotransmitters visit the link:

brainly.com/question/15257730?referrer=searchResults

#SPJ4

8 0
2 years ago
If a label indicated the presence of a radioactive isotope, you would know what
Citrus2011 [14]

Answer:

Radioisotopes are radioactive isotopes of an element

Explanation: Radioactive isotopes are detected by: photographic film.

a cloud or bubble chamber.

a liquid scintillation detector.

a Geiger-Muller counter.

5 0
2 years ago
Read 2 more answers
Why do major arteries squirt blood when cut, while veins bleed with a slower steadier rate?
scZoUnD [109]

Answer:

Arteries at at a higher pressure than veins.

Explanation:

Arteries receive blood after the heart beats, putting them at a higher pressure. They are also thicker than veins as well.

5 0
3 years ago
Will give brainless if you answer all. Which dad is the father of the baby? Explain why.
Lana71 [14]

Dad 2 is the baby's father because his DNA matches up the most with the babies, hope that helps!

6 0
2 years ago
Other questions:
  • What is lactic acid?
    14·2 answers
  • Give examples of bone injuries. How are the different bone-related structures affected in such injuries?
    13·1 answer
  • What are hippocampal place cells? A. Neurons that fire when the subject remembers being in a specific place B. Neurons that fire
    12·1 answer
  • Borrelia is classified as a spirochete because it A) Is aerobic. B) Possesses an axial filament. C) Is a rod. D) Is a pathogen.
    7·1 answer
  • How do aerobic and anaerobic respiration differ?
    7·1 answer
  • What would happen if the cell went<br> through mitosis but not cytokinesis?
    15·1 answer
  • Sean lives in an area that experiences hot, dry summers that change gradually to cold, snowy winters. If he wants to forecast th
    14·1 answer
  • Give two examples of density-dependent factors.
    13·1 answer
  • To what extent should humans manipulate human reproduction or genetic characteristics?
    7·1 answer
  • Lifting a stone with the tip of foot is?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!