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
Rasek [7]
3 years ago
11

Once your body is accustomed to a _______, the real version has a much harder time replicating itself in your system. A. vaccine

B. parasite C. pathogen D. bacterium
Biology
1 answer:
rjkz [21]3 years ago
3 0
The answer is A, a vaccine. This is why they are often given to children for prevention.
You might be interested in
Explain how the reduction in biodiversity can effect the ecological balance in the dam
hodyreva [135]
<span>Damming a river has a variety of effects on the freshwater ecosystem, more than just altering the flow from A to B.  Dams create calm bodies of water, changing overall temperature regimes and sediment transport, leading to conditions which tend to favour generalist species. Loss of specialist species, particularly endemics, changes the community structure and leads to biotic homogenization.  A dam will withhold sediment in the reservoir, not just decreasing the amount of substrate available to local freshwater species, but even impacting diadromous, estuarine and marine species much further downstream.  The competition between resident species for food and breeding sites will increase as damming isolates populations, and perhaps more importantly, damming completely restricts migratory fish species.  Isolation may lead to decreases in genetic diversity and therefore puts species at greater risk from disease.  All of these effects may be exacerbated by changes in the surrounding land use.  Overall, damming river flow will lead to both a loss of native species, but also an increase in exotic species which are more likely to become established in degraded habitats. For this reason, dams are one of the greatest global threats to freshwater biodiversity.</span>
6 0
4 years ago
What does it mean for the brain to process information contralaterally? What about ipsilaterally? How does the corpus callosum p
Vadim26 [7]

Answer:

the answer is c I promise

Explanation:

I just took the test

4 0
2 years ago
What adaptation do seed plants have in addition to the seed that is not found in seedless plants?
tatiyna

Answer:

The correct answer will be option-pollen.

Explanation:

The pollen are the male gametophyte which is produced in the seed plants.

The pollen produce male gametes after entering the female gametophyte. The male gametes fuse with the egg cell and form the embryo inside ovary which matures and forms seeds.  The vascular seed plants lack these pollen but instead produces male gametes in gametangia which are replaced by the pollen in the seed plants.

Thus, option-pollen is the correct answer.

8 0
3 years ago
PLEASE HELP I only have tomorrow morning to get my grade up.
Anika [276]

oo, The Big Bang theory predicts how much of each element should have been made in the early universe, and what we see in very distant galaxies and old stars is just right. You cannot look in new stars, like the Sun, for this evidence, because they contain elements that were created in previous generations of stars.

i hope you will get some knowledge from here❣

3 0
3 years ago
When vesicles of the cardiac sarcoplasmic reticulum (CSR) are incubated with ATP Mg^2+ and Ca^2+, they take up Ca^2+ and reach a
abruzzese [7]

Answer

I added 4 and 5 as an attachment due to time constraint.

Explanation:

1. at a steady state ca2+ taken by vesicle = 40n/mol

enclosed volume of CSR = 5μ/mg

concentration of ca2+ in vesicle =

40*10⁻⁶/5x10⁻⁶

= 0.008

= 8x10⁻⁹mol/L

2. radius of circle =75nM

volume = 150nm

volume of vesicle = 4/3 x pi x r³

= 1.33 x 3.14 x (75x10⁻⁹)³

= 1.77 x 10⁻²¹

when we convert this we get

1.77x10⁻¹⁸L since 1m³ is equal to 100oL

surface area =4x3.14x(75x10⁻⁹)²

= 12.56x5.625⁻¹⁵

= 7.065x10⁻¹⁴m²

this is 7.065x10⁻¹⁰cm²

3. number of vesicle/CSR

= 5x10⁻⁶/1.77x10⁻¹⁸

= 2.824x10¹²

surface are = 2.824x10¹² x7.06x10⁻¹⁰

= 19.95x10²

8 0
3 years ago
Other questions:
  • Amino acids that become acetyl-coa as a result of deamination are designated ketogenic amino acids because
    6·1 answer
  • In a new england forest, different species of warbler birds were discovered that feed on things they find in or below the trees.
    12·1 answer
  • Which of the following professionals could help a large city that needs a means of providing safe drinking water to all of its r
    13·1 answer
  • Which of the following is a benefit of dams?
    5·2 answers
  • True or false " human evolution ended 200,000 years ago when humans (homo sapiens) became a distinct species " justify yout answ
    10·2 answers
  • Community A has 21 species. of the 110 individuals, there are 50 individuals of one species and 3 each of the other 20 species
    8·1 answer
  • How a synthetic sponge mimics a live sponge to pick up dirt
    13·1 answer
  • The pathway water takes to reach the xylem cells in which it passes through each cell of the cortex is the ___ route. intracellu
    11·1 answer
  • A goox conductor of heat is
    8·1 answer
  • Look at the diagrams modeling some of the body systems.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!