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
daser333 [38]
3 years ago
5

When Jenner developed the first vaccine he was using the observation of milk maids who

Biology
2 answers:
vova2212 [387]3 years ago
8 0
A. after having cowpox they where immune to smallpox HOPE THIS HELPS
Scrat [10]3 years ago
8 0

Ans. Option (a).

Edward Jenner first developed a successful vaccine for smallpox in 1796. He used the observation of milk maids who were become immune to smallpox after being infected by cowpox as they were became immunized to smallpox.

It is because the virus that causes cowpox is similar to smallpox virus. When those milkmaids got infected with cowpox, their immune system made antibodies that can also kill virus for smallpox and thus, they did not get infected by smallpox.

Thus, the correct answer is option (a).

You might be interested in
In the cell cycle, cytokinesis occurs at the end of A. mitosis. B. prophase. C. interphase. D. G1 phase.
OLga [1]
The answer would be A. mitosis
7 0
3 years ago
Which reaction best explains why carbon is able to from macromolecules ?
guajiro [1.7K]

Answer:

Carbon can bond with many elements

Explanation:

Carbon can bond with many elements, including itself, to form macromolecules. Moreover, it can form four bonds, and that makes possible many different arrangements of the atoms in the molecules.

A is <em>wron</em>g. Carbon is among the seven smallest elements in the Periodic Table.

C is <em>wrong</em>. Carbon is found in living things because it can form macromolecules, not the other way around.

D is <em>wrong</em>. Carbon can bond with many other elements beside itself.

4 0
3 years ago
After experimenting with the injection of various solutions into specific areas of a rat's brain and observing the subsequent ba
Maurinko [17]
<span>The types of effects that the surgery had on the rats were documented with their bar-pressing behavior. The differences and changes from the injections effected the rats in certain ways. The location of the injection and which types that was more pleasurable for the rat is something that needs further investigation.</span>
8 0
3 years ago
PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! THIS ONE IS FOR 20 POINTS. I will also give you the brainiest points?!!!!!!!!!!!wha
nataly862011 [7]

Answer:

Cytoplasm

Explanation:

Happy to help

Pls mark as Brainliest.

6 0
3 years ago
What is another name for rod shaped bacteria
Kryger [21]

A bacillus or bacilliform bacterium is a rod-shaped bacterium or archaeon.

7 0
3 years ago
Other questions:
  • ¿que es la desnitrificacion? ¿que organismos lo llevan a cabo?
    5·1 answer
  • Name the organelles that play a role in biosynthesis?
    8·1 answer
  • Bundles of axons from ganglion cells make up the __________.
    10·2 answers
  • Which of the following organisms would be members of a pioneer community on bare rock? A. grass B. lichens C. herbs D. moss E. t
    14·1 answer
  • Can someone plz help me!!!!!!!!!!!!! this is my last question!!!!!!!!!!!!
    11·1 answer
  • Can someone explain shared dominance
    11·1 answer
  • if two black mice are crossed, the resulting offspring are as follow: 10 black mice and 3 white, what are the genotype of the pa
    8·1 answer
  • "Need this to be Sketched on Plastic" don’t need the notes part, just the Sketch.
    12·1 answer
  • Post malone is the best
    14·2 answers
  • Could more people be supported by 20 acres of land if they ate only plants instead of both plants and animals
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!