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
diamong [38]
3 years ago
15

Describe the role of nuclear fusion in the life cycle of a star.

Biology
1 answer:
castortr0y [4]3 years ago
7 0
It’s the source of all the energy from all the stars ... until their fuel is used up
You might be interested in
Blue whales have 44 chromosomes in every cell. determine how many chromosomes you would expect to find in the following:Sperm ce
baherus [9]

Sperm cell: We expect to find 22 chromosomes.

The spermatozoon is a small cell (5 micrometers in diameter), much smaller than the ovum, but with a movable tail (a flagellum) 60 micrometers long. To be lightweight and mobile, to quickly reach the egg, the sperm gains space by minimizing its cytoplasm and compacting its DNA. Head is covered with the acrosome, a pocket full of enzymes that will be used to pierce the membrane of the egg.

It is a haploid cell because it contains half of the genetic material of the individual, lost at the time of meiosis during the process of spermatogenesis that the primordial germ cells undergo in the seminiferous tubules of the testes.


Egg Cell: We expect to find 22 chromosomes.

The egg is the sexual cell (or gamete) produced by the females of the animals.

Like all gametes, the egg is haploid, it contains half of the chromosomes of the future embryo, so the number of chromosomes will be 22 instead of 44. Then this egg will meet a sperm cell to gather their chromosome and form an embryo of 44 chromosomes.


Daughter Cell from Mitosis: We expect to find 44 chromosomes.

Mitosis, which ensures the birth of cells identical to the mother cell during asexual multiplication (so the number of chromosomes will remain the same, it will not divide in two).

Mitosis is an asexual cell division. This means that it is just a division of a mother cell into two daughter cells, which will inherit exactly the same genetic inheritance.


Daughter Cell from Meiosis II: We expect to find 22 chromosomes.

Meiosis is a particular mode of division of the living cell by which an initial cell with 2n chromosomes (in this case 2n = 44 chromosomes), a diploid stage, gives rise to four daughter cells possessing only n chromosomes, a haploid stage (n = 22 chromosomes). Meiosis is one of the forms of cell reproduction, this process is performed on the gonads to produce gametes.

4 0
3 years ago
Read 2 more answers
A polypeptide only becomes a functioning protein after it has folded into its exact 3D shape.
makkiz [27]
True. A protein becomes functional only when it reaches its tertiary shape (3D). It is not necessary for the protein to reach the quaternary stage, but that is just a more complex functioning protein. It really is just two tertiary merged together. Example is red blood cells.
4 0
3 years ago
Nitrogen cycle and algal bloom
salantis [7]
What is the question?
6 0
3 years ago
Read 2 more answers
Which statement best describes what occurs to a molecular of the enzymes trysin after it bind to a molecular of protein
padilas [110]

Trypins breaks down the protien into simple amino acids which are absorbed by the gut wall.

8 0
3 years ago
Which is a part of a neuron that sends out messages
hichkok12 [17]

Answer:

Axon

Explanation:

A neuron has three main parts. The cell body directs all activities of the neuron. Dendrites extend out from the cell body and receive messages from other nerve cells. An axon is a long single fiber that transmits messages from the cell body to the dendrites of other neurons or to other body tissues, such as muscles.

5 0
3 years ago
Other questions:
  • Please Help? ^^READ PICTURE^^
    8·1 answer
  • Organisms that reproduce sexually recieve genetic material from both parents when fertilization occurs. The development of the z
    13·1 answer
  • Wich statements are correct concerning human dna?
    10·1 answer
  • Which of the following would most likely incense the rate of photosynthesis?
    11·1 answer
  • Which statement BEST describes what occurs to a molecule of the enzyme trypsin AFTER it binds to a molecule of protein? A) After
    7·2 answers
  • Is Osteoporosis an infectious disease or non-infectious?
    10·1 answer
  • Neuroglia do all of the following except:______. a. transmit electrical impulses. b. regulate interstitial fluid composition. c.
    5·2 answers
  • After the gram staining procedure, you realized you went too fast and have forgetten to apply the 95% ehtanol. What might be the
    7·1 answer
  • Which one of the following characteristics of Archaea enables them to survive in extreme environments?
    9·2 answers
  • Anyone want points? or sometin
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!