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PolarNik [594]
3 years ago
15

1. In the order they occur, list and describe the 4 main steps of mitosis. You may provide an illustration if you prefer, but yo

u must name the steps in order. (4 points)
Biology
1 answer:
Marta_Voda [28]3 years ago
8 0
Prophase: Cell prepares for division by condensing the chromosomes in the nucleus. Spindles align near the nuclear envelope on opposite sides.
Metaphase: Chromosome meet at the center and line up. Each set of spindle fibers on each side of the nuclear envelope attach to the closest sister chromatid of the chromosomes.
Anaphase: Chromosomes split apart by releasing the centromere that connects them. The two halves are pulled to the opposite sides by the spindle fibers and the cell elongates.
Telephase: A nuclear envelope forms around each set of chromosomes that are at either end of the cell and the spindles break down as the cell breaks into two identical daughter cells.

There is a step called Interphase before these 4 main steps where the cell prepares for replication and duplicates all of the DNA in the nucleus in preparation for the division.
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What is the nervous system composed of?
Maru [420]

Answer: D) the central and peripheral nervous systems

hope this helps

8 0
3 years ago
1. The effect of initial population sizes on the growth of populations of an organism was
ella [17]

When graphing data, we must consider the variables, label axes, define units of measure. In this case, variables are initial population size / final population size, showing an directly proportional relationship.

-------------------------------------

We need to construct a graph illustrating the data in the table.

We can make a <u>dispersion graph</u>. To do it, we need to define variables.

Since we want to know how <em>different initial population sizes affect population growth, </em>

  • the independent variable is the initial population size
  • the dependent variable is the final population size (after 24 hours)

The final population size depends on the initial population size. This is, <em>the number of individuals at the beginning will </em><em>influence</em><em> the final number of individuals</em>.

  • Initial population sizes ⇒X horizontal ax ⇒Unit: Number of individuals
  • Final population sizes ⇒ Y vertical ax ⇒ Unit: Number of individuals

By making a dispersion graph, we can represent the effect of the varying initial population sizes on the final population sizes. We can compare these effects and observe how populations grow as the N₀ increases.

We can also choose a <u>bar graph</u>. In this way, we can compare initial and final population sizes.

This graph will show populations and two bars per population.

  • Blue bar ⇒N₀⇒ Initial population size
  • Red bar ⇒N₁ ⇒ Final population size
  • Different populations ⇒ 1, 2, 3, 4, 5 ⇒ Represented in the X horizontal ax
  • The number of individuals ⇒ from 1 to 324 ⇒ Represented in the Y vertical ax.

By making a bar graph, we can represent initial and final population sizes and compare them. <em>The population that begins with 1 individual, after 24 hours has 4 individuals. The population that begins with 3 individuals, ends with 9 individuals. And so on</em>.

No matter which graph you choose, you will observe a directly proportional relationship between both variables. The bigger is the initial population size, the bigger it ends after 24 hs.

---------------------------------

Related link: brainly.com/question/24827485

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5 0
3 years ago
In sickle cell anemia, there is a replacement in the amino acid sequence of hemoglobin of glutamic acid by valine. what is the d
erik [133]

Valine is a hydrophobic amino acid used for biosynthesis of proteins.  It is essential in humans, meaning the body cannot synthesize it and it must be obtained from the diet.

Glutamic is a hydrophilic amino acid used by almost all living beings in the biosynthesis of proteins. It is non-essential in humans and the body can synthesize it.

4 0
3 years ago
What is the probability of two tall pea plants, heterozygous for the tall allele, producing a short pea plan
Maksim231197 [3]

Answer:

1/4 so 25%

Explanation:

       A       a

A     AA     Aa

a      Aa     aa

4 0
3 years ago
Read 2 more answers
Q6.2. There are many diseases that do not infect a person more than once, such as chicken pox
Vilka [71]

The responsible for this lifetime immunity is the acquired immune response because antibodies are developed from previous infections. The generation of antibodies is a response to these infections.

The acquired immune system eliminates pathogenic organisms and any toxic molecules they produce.

The acquired immune system has two mechanisms of action: humoral immunity and cellular immunity.

Humoral immunity, also known as antibody-mediated immunity, involves the activation of specific blood cells (B cells) and subsequent secretion of antibodies when in contact with a pathogen.

Thus, the acquired immune system develops specific antibodies as a response to infections (e.g., chickenpox and measles).

Learn more in:

brainly.com/question/1379924?referrer=searchResults

3 0
3 years ago
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