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
Blizzard [7]
3 years ago
11

Which of the following is a true difference between t cells and b cells?

Biology
1 answer:
shusha [124]3 years ago
4 0
B cells produce antigen
t cell are helper,killer,memory cells
they hold memory of pathogens i the system
You might be interested in
What type of factor is a living or<br> once-living part of an ecosystem?
kicyunya [14]

Answer:

an organism

Explanation:

or Biotic factors

8 0
2 years ago
You and your roommate do a genetic analysis and learn that you share the same maternal ancestor 15,000 years ago in Europe. Whic
Vesnalui [34]

Answer:

Mitochondrial DNA.

Explanation:

Mitochondria is known as the power house of the cell and one of the important organelle responsible for the production of energy. Mitochondria contains its own DNA.

To understand the maternal ancestor history, the mitochondria DNA  must be studied. The mitochondria is solely obtained from the mother as the egg contains large amount of cytoplasm that contains mitochondria. The mitochondria can never be inherited from paternal origin as the sperm contains few amount of cytoplasm and mitochondria.

Thus, the answer is mitochondrial DNA.

4 0
3 years ago
When two species compete for the same ecological niche, they cannot coexist because they are competing for the exact same resour
zalisa [80]
The correct answer is B. competitive exclusion.
This law refers to the fact that it is nearly impossible for two species to exist in the same place at the same time together, if they are interested in the same resources. If both species need the same thing to survive, one will have to be stronger while the other one will dwindle in number. 
5 0
3 years ago
How long would it take for the bacteria to go from 1 bacterium to 500 bacteria?
yan [13]
Doubling time aerobic bacteria generally grow fast and may have a doubling time 30
6 0
3 years ago
Read 2 more answers
What is endosperm? via cotyledons, a source of food for the embryo the leaves that are a part of the embryo the male portion of
AfilCa [17]

Answer: Option A

Explanation:

An endosperm is defined as the tissue which are produced inside the seeds during fertilization. As the endosperm surrounds the embryo, it acts as the food storage for the embryo and provide nutrition.

During embryo development , endosperms supports enlargement of cotyledons which helps in storage function and stores fats and starch and provide nourishment to the embryo.

for example cereal crops or grains are primarily endosperm which stores fat and starch and are edible fruits.

Hence, the correct option is A, endosperm can be a cotyledon which functions as a source of food for embryo.

4 0
3 years ago
Other questions:
  • A nurse has been teaching an adolescent how to self-administer insulin. despite repeated instruction, the adolescent will use on
    9·2 answers
  • Physical differences between the jaws of the gorilla, Australopithecus, and modern human?
    10·1 answer
  • Over time, color variation in a population of butterflies declined. The number of color variations within the population was twe
    6·2 answers
  • What change occurred in the atmosphere 2.5 billion years ago
    9·1 answer
  • Why is it important to balance majority rule with minority rights
    7·1 answer
  • Which of the following is an advantage of biomass as an energy source?
    10·1 answer
  • Select all that apply.
    7·1 answer
  • Do the majority of people on earth live in more or less developed countries?
    6·1 answer
  • What is the result of homeostasis at the cellular level? *
    14·2 answers
  • Which mhc class of antigens is necessary for antigen recognition by cd4-positive t cells?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!