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
Iteru [2.4K]
4 years ago
6

Where does positive selection of t cells occur?

Biology
1 answer:
erik [133]4 years ago
3 0
Positive selection of t cells occur in .the thymus
You might be interested in
What mass of water in grams will fill a fish tank 100 cm long, 50 cm wide, and 30 cm high?
Natasha_Volkova [10]

Answer:

150,000cm^3, or 1,500m^3

Explanation:

The question is basically asking the volume of this rectangular tank.

The formula to find the volume is length x width x height.

This is because we're trying to find the area of the base (length x width), and then we're multiplying the base times the height, to get how much of the base area can fit in the height of the rectangle.

So, the answer is 100cm x 50cm x 30cm = 150,000cm^3, or 1,500m^3, because 1 meter = 100 centimeters.

6 0
3 years ago
3. Which is not an example of symbiosis?
S_A_V [24]

Answer:

The correct answer is B. generalism.

Explanation:

Mutualism is a symbiotic relationship wherein both organisms benefit from the other’s presence. Parasitism is a symbiotic relationship wherein one organism benefits at the expense of the other organism, which is harmed. Finally, commensalism is a symbiotic relationship wherein one organism benefits and the other is neither helped nor harmed. Generalism does not refer to a symbiotic relationship and thus is the correct response.

Hope this helps!

6 0
4 years ago
Read 2 more answers
Jared Harless shattered his elbow in a snowboarding accident and decided to visit a doctor at Smith Union Hospital for treatment
Sunny_sXe [5.5K]
<span>Well this isn't actually a question but to market to a company like this you first have to impress a small number of people in a single chain of command. Your products don't have to be marketed to a company as a whole or to a single rung of the food chain but to each successive member in a hierarchy in the company. Firstly to the employee, then to their management then to the ones who actually making the decision to buy.</span>
7 0
3 years ago
What kind of rocks are formed by the precipitation of a mineral?
mart [117]
B. Evaporates
Evaporite is the term for a water-soluble mineral sediment that results from concentration and crystallization by evaporation from an aqueous solution.
7 0
3 years ago
When studying animal behavior, the distribution of organisms within a choice chamber can be studied to identify animal preferenc
Komok [63]

Answer:

c

Explanation:

Random distribution of the Isopods should be 50/50 in A and B.

Chi-square = \frac{(O - E)^2}{E} where O = observed frequency and E = expected frequency

Chamber         O                    E             Chi-square

  A                   18                   10             \frac{(18 - 10)^2}{10} = 6.4

  B                    2                    10             \frac{(2 - 10)^2}{10} = 6.4

<em>Total Chi-square </em>= 6.4 + 6.4 = 12.8

<em>Degree of freedom</em> = 2 - 1 = 1

<em>Tabulated Chi-square</em> (α = 0.05) = 3.8415

The calculated Chi-square exceeds the critical value, hence, it is significant and not due to random.

<em>The correct option is </em><em>c</em><em>.</em>

4 0
3 years ago
Other questions:
  • Hydrogen and carbon form non-polar bond. What relevance is<br> this<br> to living organisms?
    14·1 answer
  • A corn plant known to be heterozygous at three loci is testcrossed. The progeny phenotypes and numbers are as follows:+ + + 455a
    8·1 answer
  • The gradual development of a species into a new one to survive.
    8·2 answers
  • What is the name of the solid part of Earth, including rock, minerals, and metals?
    13·2 answers
  • Which of the following describes prokarotes
    12·1 answer
  • Scientific notation for 0.000468
    10·2 answers
  • Which two cell parts are most likely found in both types of cell? cell wall and cell membrane lysosome and vacuole vacuole and c
    6·2 answers
  • Read the passage below about acupuncture.
    7·2 answers
  • Which describes the relationship between a genotype, a phenotype, and an organism’s experiences?
    6·2 answers
  • Hemoglobin is the oxygen carrying compound found in human blood. It is found to contain 0.3335% iron by mass. It is already know
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!