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
GenaCL600 [577]
3 years ago
14

Sam came home from school with a cold caused by a virus and his sister, Ana, caught it from him. Sam got well and went back to s

chool. A few days before Ana got well, Sam came down with a cold again. Their mother said that Ana had given the cold back to Sam. How likely is it that their mother is correct, and what does it mean for Ana's chances of getting sick again?
A. If Sam only had a mild infection of the virus he might not have acquired immunity to it and could catch it again, as could Ana if she had a mild infection.
B. Sam could not get sick with the same virus again since he has acquired immunity to it, so he must have a different virus which Ana could catch.
C. If Sam's body did not store up enough antibodies to the virus he could get sick with it again, as could Ana if the same thing happened to her.
D. Sam could have picked up another virus at school as well as catching the same one from Ana again, so Ana could get sick again with either virus.
Biology
2 answers:
Naddik [55]3 years ago
8 0
Hmm I'm thinking D. Sam could have picked up another virus at school as well as catching the same one from Ana again, so Ana could get sick again with either virus.
Stolb23 [73]3 years ago
7 0

Answer:

the 1st answer

Explanation:

You might be interested in
Which of these is not a function of cell division?
Alika [10]
The respiration is not of the cell division
5 0
3 years ago
Prokaryotes are classified as belonging to two different domains. What are the domains?
Basile [38]

Answer:

Bacteria and Archaea

Explanation:

The prokaryotes are classified into two domains, the bacteria and the archaea domains. This makes them unique as the other organisms fall into one of the three domains, not in two of them. The prokaryotes come in many different shapes. They all do fall into three categories, bacilli (which are the rod-shaped prokaryotes), spirilli (which are the spiral-shaped prokaryotes), and cocci (which are the spherical shaped prokaryotes).

6 0
3 years ago
Cell cycle checkpoints are an important feature of a dividing cell to reduce errors that can occur in various stages of the cell
saveliy_v [14]

Loss of Rb, an important part of the G1-S transition checkpoint, can result in uncontrolled cell cycle progression and cancer. All of the following would mimic loss of Rb except constitutively active Ras GTPase activating protein. Correct answer: letter E.

Constitutively active Ras GTPase activating protein would not mimic loss of Rb, because it would not directly result in uncontrolled cell cycle progression.

<h3>What is Retinoblastoma (RB)?</h3>

Rb is an important tumor suppressor protein that works to inhibit cell cycle progression by preventing the activation of E2F transcription factors. Constitutively active Ras GTPase activating protein would not directly interfere with the Rb-E2F pathway, which is necessary for uncontrolled cell cycle progression and cancer.

Learn more about the cell cycle:

brainly.com/question/2457509

#SPJ4

4 0
1 year ago
The picture on the left is from August 2006 the picture on the right is from August 2015 which of these efforts has the most inf
Sonbull [250]

The answer is D for apex

7 0
3 years ago
Read 2 more answers
¿Cómo se produce la Hepatitis B?
guapka [62]

La hepatitis B es un virus, una infección de su hígado. Puede causar cicatrización del órgano, insuficiencia hepática y cáncer.

8 0
3 years ago
Other questions:
  • 1.What are examples of producers, primary consumers, secondary consumers, and tertiary consumers?
    7·1 answer
  • Which of these is evidence of global warming ?
    13·2 answers
  • What is any characteristics that help an animal survive
    13·1 answer
  • At the end of Phase 3, anaphase … Select one: a. ...two daughter cells are present b. ...each pole of the cell has a complete se
    13·1 answer
  • I have a simple question about external variables. If I'm doing an egg drop experiment, and my teacher "chucks" it off of the ro
    14·1 answer
  • A hawk swoops down And catches a squirrel the squirrel provides energy or the hawk what happens to the rest of the matter
    7·1 answer
  • What do nucleosomes form when they supercoil?
    9·1 answer
  • 5: What does water have to do with our metabolism?
    5·2 answers
  • Which of these actions has contributed to the increase of greenhouse gases in the atmosphere?
    6·1 answer
  • Answer to the following questions in complete sentences.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!