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
Veseljchak [2.6K]
3 years ago
7

The immune systems __________ line of defense against infectious diseases includes the skin

Biology
1 answer:
Serjik [45]3 years ago
6 0

Answer: First line of defense.

Explanation: The immune system's way of protection initially begins using the skin to protect against any physical and chemical harm. This is called the first line of defense. Amongst other first line defense mechanism includes; tears to protect from harmful substance in dust and air, cillia inside the nose, the internal mucosal linings to protect against harsh chemicals as well as freindly bacteria called our normal microflora.

You might be interested in
A gene involved in neural development shows three times as many synonymous site substitutions than nonsynonymous ones. A likely
Anni [7]
The answer is b. is under purifying selection
7 0
3 years ago
HURRY PLZZ I REALLY REALLY NEED THIS
densk [106]

The first question is horses having long legs so they can run away from predators

The second question is Animals are less likely to eat this plant.

The third question is White skin is a favorable adaptation because it makes the lizards hard to see against the white sand.

The fourth question is Organisms produce fewer offspring if the environment does not have enough resources.

The fifth question is People kill rattlesnakes that rattle when approached by humans, but people do not kill rattlesnakes that remain silent. The quiet snakes survive and breed.

The sixth question is With the smallest population size

If this helps brainliest answer would be appreciated

7 0
3 years ago
Read 2 more answers
Finches that live in an isolated area with limited access to seeds and water is an example of what mechanism in Darwin's theory
Brums [2.3K]

Answer:

c. Limits on population growth

Explanation:

Darwin was heavily influenced by Malthusian theory of how population growth was influenced by growth limits. For Darwin, the population growth of species of living beings would be influenced by the limits imposed by the environment in which these species live, through the amounts of natural resources available to the population.

Thus, Darwin concludes that when the environment allowed an abundance of natural resources, such as water and food, the population of living beings would tend to grow more, however, when natural resources are limited, the population would grow less. This is called "population growth limits".

An example of this can be seen in the question above, where finches that live in an isolated area have limited access to seeds and water.

4 0
3 years ago
What would happen to the living things in the pond if you increase the concentration of salt?
tino4ka555 [31]

Answer:

they would perish

Explanation:

4 0
3 years ago
What gives sperms motility​
Mandarinka [93]

Answer:

The tail of the sperm, the flagellum

Explanation:

We find cilia in the human body. They coat the epithelial cells of the upper respiratory tract and play a role in keeping dust particles, smog, and potentially harmful microorganisms from entering the lungs.

Their movements enable the movement of mucus or other substances across the surface of various epithelial cells. The cilia also cover parts of the male and female reproductive tract.  

Flagella are found in sperm, whose tail represents the flagellum in its structure. The body wall of the sponge, among others, contains cells with whips that create and maintain the flow of water through the body.

7 0
3 years ago
Other questions:
  • Fermentation of glucose produces ethanol and carbon dioxide. The unbalanced equation is shown above. How many molecules of CO2 a
    9·2 answers
  • The Human Genome Project analyzes DNA using a technique called:
    14·1 answer
  • The division of the nucleus in reproductive cells is called:
    10·2 answers
  • These laws are meant to reduce which human induced environmental change
    15·2 answers
  • Plants use the energy from the sun to convert A) water into sugar. B) carbon dioxide into sugar. Eliminate C) carbon dioxide int
    14·2 answers
  • There are two types of cells. PROKARYOTIC= ______________________
    7·2 answers
  • An environmental change causes a decrease in the amount of oxygen that is dissolved in the pond water. Explain why this change w
    11·1 answer
  • Auxins cause cells to grow ___. A. Longer on the sunny side of the stem. B. Shorter on the sunny side of the stem . C.shorter on
    9·1 answer
  • HALP MEEEE
    15·2 answers
  • Which describes a feature of synthetic polymers?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!