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
dexar [7]
3 years ago
8

HELP!!! 30 POINTS!!!

Biology
2 answers:
katrin [286]3 years ago
5 0
I’m pretty it’s freckles :)

notka56 [123]3 years ago
4 0

<em>Answer:</em>

<em>The correct answer is option "B"</em>

<em>Explanation:</em>

<em> Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid. Also, the normal flow of urine washes out microorganisms that enter the urinary tract.</em>

You might be interested in
The cell theory teaches that _____.
Serjik [45]
The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cellsarise from existing cells. Rudolf Virchow later made important contributions to this theory. ... Thecell is the fundamental unit of structure and function in living things.
7 0
3 years ago
Read 2 more answers
What's reproduction n respiratory system
Archy [21]

Answer:

Reproduction is the ability of living organisms to give rise to new individuals of the same species.

Respiratory system includes all the structures and organs of living organisms associated with the process of taking oxygen into the body and giving out carbon dioxide and water vapour into the environment.

3 0
4 years ago
What is the speed of a wave with a wavelength of 3 m and a frequency of .1 Hz? 0.03 m/s 0.3 m/s 3.1 m/s 30 m/s
Natasha_Volkova [10]

Answer:

The correct answer is option b, 0.3m/s

Step by Step solution:

The relation between speed, wavelength and frequency of a wave is given by the following equation:  

Speed = Wavelength x Frequency

Substituting the values in above equation we get –  

= 3  x 0.1  

= 0.3 m/s  

7 0
3 years ago
Read 2 more answers
Natural selection is also known as
Makovka662 [10]

Answer:the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

Explanation:

Brainliest?

3 0
3 years ago
Read 2 more answers
How are sexual traits adaptations<br>​
Vesnalui [34]

Answer:

stronger and longer organ are able to mate more with females, whereas the shorter one didn't stand a chance.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Where are ganglia of the parasympathetic division located?
    13·1 answer
  • Portions of the genomes of certain prokaryotic species are very similar to portions of the genomes of distantly related prokaryo
    14·1 answer
  • What word matches this definition gel like mixture holds organelles in place
    11·1 answer
  • Evaluate the age of rocks. You find 3 undisturbed rock layers. The middle layer is 120 years old. What can you say about the age
    6·2 answers
  • PLEASE HELP!!!!!!!!!!!!!!!!111
    7·2 answers
  • The majority of aquatic animals have BLANK fertilization.<br> A.internal<br> B.external
    8·1 answer
  • True or False: Within the body, all atoms combine to form molecules. If false, why?
    8·1 answer
  • A fertilized egg, or a
    12·1 answer
  • Which compound that provides energy in cells is made in every tube where cellular respiration is occuring?
    5·1 answer
  • 1. The world has many different biomes. A biome is an area that can be described by its weather or climate. What type of biome d
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!