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
Alex787 [66]
3 years ago
7

The stages of meiosis are classified into two phases. explain why there is in need of two phases

Biology
1 answer:
choli [55]3 years ago
4 0
The two phases meiosis is divided into is Meiosis I and Meiosis II. Because Meiosis is not asexual reproduction is uses sexual reproduction by combining the chromosomes of the mother and father. Since each parent give 23 chromosomes to make the whole 46 a human needs, when the chromosomes come together they create tetrads. these are pairs of replicated chromosomes. There are 2 phases because the first phase separates the tetrads leaving the two sister chromatids. During Meiosis II, the sister chromatids are separated like in Mitosis. Overall, the reason that there are two phases is because the maternal and paternal gametes give replicated chromosomes to the zygote.
You might be interested in
Human caused climate change (most notably, global warming) has many positive feedback loops intrinsic to itself. Please describe
Tomtit [17]

When we burn fossil fuels to produce electricity, heat, and more, they emit greenhouse gases (GHGs) like carbon dioxide (CO2) and methane. These gases trap the sun’s energy in Earth’s atmosphere as heat. As more and more GHGs are released, more heat gets trapped and the planet warms up, disrupting the long-standing, delicate climate systems that have made life on Earth possible.

The stronger storms and longer droughts we see becoming a dangerous new normal are a direct result. But how these impacts play off each other is far more nuanced. In many cases, the wildfires or disappearing glaciers we see in the headlines have unseen knock-on effects that lead to, well, more wildfires and disappearing glaciers.

Think of it like dominos lined up in an infinite spiral – once one domino falls, it creates a reaction that pushes over another and then another right on down the line.

3 0
3 years ago
Using the information provided in the data table; which planet would have the greatest gravitational pull?
Brut [27]

Answer:

B

Explanation:

Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.

8 0
4 years ago
Read 2 more answers
What can you conclude about the life cycle of a plant?
guapka [62]

Answer:

Not all plants live till old age

Explanation:

3 0
3 years ago
Read 2 more answers
Plz I so tuck on this
Ahat [919]

Answer:

b;e

Explanation:

the top person is right just need the points

8 0
3 years ago
Define the 3 major shapes of bacteria
dybincka [34]
<span>CocciThe most common of the 3 shapes of bacteria is cocci, or round bacteria. An example of a bacteria that appears round is Streptococcus. There are several variations of Streptococci, and they are distinguished in part by their arrangement. Some Streptococci exist in pairs, such as Streptococcus pneumonia, which can cause pneumonia. Others are joined in chains. One of the most well-known Streptococci is Group A Beta hemolytic Streptococci. Beta hemolysis appears as a clear area surrounding the colony growing on a blood agar plate. The hemolysis occurs because of a hemolysin the organism emits which breaks down red blood cells. This is useful in distinguishing Group A Beta Strep from other less virulent strains of Streptococci.Another cocci, which can be serious, is Staphylococcus aureus. Staph aureus appears in grape-like clusters under a microscope and has become resistant to many types of antibiotics. A variant of Staph aureus is called methicillin-resistant Staph aureus, which is often found in hospital acquired infections and has mutated due to overuse of antibiotics. It is very difficult to treat methicillin-resistant Staph aureus (MRSA).BacilliAnother of the 3 shapes of bacteria is bacilli. These are rod shaped, gram positive organisms. One of the most commonly known bacilli is Bacillus antracis, which is the bacteria that can cause anthrax. Bacillus antracis, as well as other strains of Bacillus, are typically found in soil and are usually not harmful to humans.Lactobacillus is another common gram positive bacilli found in many probiotics. It is helpful for the digestive system, providing what are considered "good" bacteria for healthy digestion. There are a number of varieties of Lactobacilli found in probiotics, such as Kiefer.SpirillumSpirillum are spiral shaped bacteria that stain gram negative. They move with tufts of flagella located at both ends. One of the most common spirillum that affects humans is Treponema pallidum, which causes syphilis. Most spirilla affect animals; however, there is a variety that can cause rat bite fever in humans.</span>
8 0
3 years ago
Other questions:
  • Organization is one of the characteristics of life. Explain how your observations under the magnifying glass support this idea.
    7·1 answer
  • An organelle that releases stored energy, which comes mostly from sugars
    5·1 answer
  • Taking certain drugs during pregnancy is likely to expose unborn children to
    12·1 answer
  • L 1.3.3 Quiz: Big Earth, Big Concepts
    13·1 answer
  • What era happened after the precambrian?
    7·2 answers
  • What is the name of the portion of the urethra that passes through the center of the prostate gland?
    10·1 answer
  • Study the graph above. What does this graph suggest about the relationship between human population and extinction rate
    8·2 answers
  • In multicellular organisms, many cells perform specific jobs that other cells do not, which allows
    5·1 answer
  • What is a positive effect of the technological advance of going from a compass to a gps
    11·1 answer
  • 2.Why do introduced species often disrupt an ecosystem?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!