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
disa [49]
3 years ago
12

John and Pat are identical twins with identical DNA. John works in a movie theater, and Pat works as a lifeguard. They have very

different skin pigmentation. Which is the best explanation of the difference?
Biology
2 answers:
ioda3 years ago
7 0
Pat has likely been in the sun longer than John, since she/he works outside. Since she is outside longer, her/his skin has learned to adapt to it by producing more melanin to protect her/him. John doesn't go outside as much so his skin doesn't need to adapt to sun rays.
mihalych1998 [28]3 years ago
4 0

The answer is:

A) Skin color, a polygenic trait, is also determined by environmental factors.


Hope it helps!

You might be interested in
continuous microfluidic self-assembly of hybrid janus-like vesicular motors: autonomous propulsion and controlled release
Andrew [12]

Continuous microfluidic self-assembly of hybrid janus-like vesicular motors.

  • Artificial micro/nanomachines have enormous applications in such as targeted drug delivery, [ 1 ] separation of biomolecules or cells, [ 2 ] surface patterning, [ 3 ] and environmental remediation
  • Micro/nanomotor systems that have been investigated include multimetallic and dielectric particles, [ 6 ]bimetallic nanorods, [ 7 ] tubular catalytic microengines, [ 8 ] andcapsule motors
  • In the past decade, microfl uidic technology has emerged as a powerful platform for a wide range of applications such as bioanalysis, [ 15 ] tissue engineering, [ 16 ] cellular biology, [ 17 ] and chemical synthesis/assembl
  • Microfluidics offers several advantages over conventional batch reaction or assembly, such as continuous and automatic processing, precise control over synthetic conditions, and high reproducibility. [ 19 ] Microfluidic approaches have been used for the assembly of amphiphilic building blocks such as lipids, block copolymers (BCPs), and inorganic NPs into vesicular structures with superior controllability. [ 18a , 20 ] However, to date, there has been no report of continuous micro fluidic synthesis of nano- or micromotors.

To know more about  Microfluidic  visit : brainly.com/question/28192808

#SPJ4

4 0
2 years ago
Which describes a eukaryotic cell, but not a prokaryotic cell? a. uses DNA to control cell activities b. is surrounded by a cell
11Alexandr11 [23.1K]

Answer: Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes.

So..the answer should be D. Eukaryotic cells have a true membrane-bound nucleus and prokaryotes do not

All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. Prokaryotic cells lack a nucleus and membrane-bound structures. Eukaryotic cells have a nucleus and membrane-bound structures called organelles.

So..it can't be C. or A. or even B.

Correct me if I'm wrong.

4 0
4 years ago
When a newly formed cell enters into interphase and begins conducting metabolic functions, it is in _____. G0 phase G1 phase G2
Ratling [72]
<span>When a newly formed cell enters into interphase and begins conducting metabolic functions, it is in G1 phase.</span>
7 0
4 years ago
Read 2 more answers
A rightward force is applied to a book in order to move it across a desk
IRINA_888 [86]

If a rightward force is applied to a book, it moves right across the desk.

8 0
3 years ago
Read 2 more answers
What is a example of universal solvent
MatroZZZ [7]

Answer:

Read more here:

Explanation:

Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. ... Water molecules have a polar arrangement of oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.

3 0
3 years ago
Read 2 more answers
Other questions:
  • How does atrazine stop plant growth
    14·2 answers
  • If a tornado destroys a deciduous forest, what kind of succession follows?
    10·2 answers
  • Read the following selection from "A Retrieved Reformation" and answer the question that follows:
    12·2 answers
  • A force that pulls water up slowing its downward movement is___
    7·1 answer
  • How are the chemical equation for photosynthesis and cellular respiration related?
    8·1 answer
  • The kidneys filter 2of blood every hour
    15·1 answer
  • Anesthesia blocks (A. Sensory Neurons B. Motor Neurons C. Interneurons) from carrying signals to the (A. spinal cord B. muscles
    11·1 answer
  • What makes an illness reportable? Give an example of a mandatory reportable disease and a reason
    7·1 answer
  • Explain the use of NBT<br>​
    13·1 answer
  • The theory of evolution by natural selection states that?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!