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
tiny-mole [99]
3 years ago
15

Under normal conditions, when cells are not in contact with other cells this will signalthem to divide. When cells are too close

ly packed together they will stop dividing.These are examples of ______________ signals.
A. external
B. chemical
C. internal
D. None of the above
Biology
2 answers:
iren2701 [21]3 years ago
8 0
It is an example of external contact. The correct option is A.
Nitella [24]3 years ago
7 0
A. external
These types of signals are observed when there is a cut on the body. The epidermal cells lose contact with one another and divide faster until they are in contact once again. After they come into contact, division slows down again.
You might be interested in
when fossil fuels are burned they produce what the main greenhouse gas responsible for global warming trends
daser333 [38]
When fossil fuels are burned they can cause pollution which can cause global warming. 
7 0
3 years ago
Read 2 more answers
Every 18 months, during the Spring tide, the Moon is at its closest distance to the Earth, called its _____. This produces gravi
ankoles [38]
Perigee is the correct answer. T<span>his high tide is also known as the proxigean </span>spring tide<span>.</span>
8 0
3 years ago
Read 2 more answers
Is the equation balanced? Why or why not?
diamong [38]

Answer:reaction, or reactants becoming products: A + B →. C + D reactants products ... CaCl2 has two Cl's because Ca is +2 charged so we need two –1 ... Due to the Law of Conservation, the number of atoms (and the mass) of each ... This is a balanced equation – same number of H and O atoms on both sides of the arrow.

Explanation:

5 0
3 years ago
Read 2 more answers
A distinguishing trait that identifies an embryonic stem cell
SOVA2 [1]

Answer:

Explanation:

they are capable of dividing and renewing themselves for long periods; they are unspecialized; and they can give rise to specialized cell types.  es cells are pluripotent, that is, they are able to differentiate into all derivatives of the three primary germ layers: ectoderm, endoderm, and mesoderm.

6 0
3 years ago
Need help with the rest
taurus [48]

Answer:

Heres a link to a labeled diagram of the heart. Sorry I was trying to put a picture in but It wouldn't save as a JPEG file

Link:

           https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjpw8LI4vzlAhVMPn0KHWHnCTkQjRx6BAgBEAQ&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFile%3ADiagram_of_the_human_heart_(cropped).svg&psig=AOvVaw2LsD24TXBtoTcH1kjWCRJC&ust=1574476068782790

5 0
3 years ago
Other questions:
  • In photosynthesis, what gives energy to the electron moving through the electron transport chain?
    14·2 answers
  • Most plantonic life in the ocean exists in an area that is very vulnerable to marine pollution. This area is called the ________
    6·2 answers
  • When humans eat sugar, the sugar is broken down and released as?
    12·2 answers
  • Which organelle should be listed under “Both” in the diagram?
    13·2 answers
  • Check all of the BIOTIC factors in an ecosystem. <br><br> THE SUN<br> TREES<br> ANIMALS<br> PLANTS
    8·1 answer
  • The red panda is an endangered mammal. Red pandas live in the trees in the forests in China. Explain one way of
    5·1 answer
  • 2. Wolves have genes that give them a very powerful sense of smell much more
    8·1 answer
  • What was the most challenging activity why​
    7·2 answers
  • Green plants make their own food through a process known as...
    10·2 answers
  • QUESTION 3
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!