What happens to the number of particles in the sample

Saccharomyces cerevisiae is a diploid yeast species that can reproduce either sexually or asexually. An experiment was performed

Savatey [412]

Answer:

D. The first division will reduce the number of chromosomes by half for each daughter cell, and the second division will move single chromatids to each daughter cell.

Explanation:

Gametes are formed by meiosis in diploid gamete mother cells. During gamete formation, the gamete mother cell in the yeast would undergo meiosis I. During first division (meiosis-I), the process of crossing over during prophase-I creates genetic variations and movement of homologous chromosomes to the opposite poles during anaphase-I reduces the chromosome number to half in each daughter cell.

Two daughter cells are formed by the end of meiosis-I each of which enters meiosis-II. Splitting of centromere and separation of sister chromatids during anaphase-II of meiosis-II results in the movement of single chromatids to the opposite poles of the cells.

6 0

2 years ago

Which structures do paramecia use to move around? A. flagella B. cilia C. pseudopodia D. haptonema E. tentacles

Alex73 [517]

B.Cilia -These are hair like structures that aid in movement found on the paramecium

3 0

2 years ago

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Name the three general categories into which the elements are divided

umka2103 [35]

Answer:

metals, nonmetals and metalloids

3 0

3 years ago

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How many grams of urea (non volatile, non electrolyte) must be added to 1250. g water to give a solution with a vapor pressure l

Lady bird [3.3K]

Answer:

$\large\boxed{\large\boxed{107g}}$

Explanation:

The vapor pressure lowering is a colligative property and it follows Raoult's law.

The vapor pressure lowering of a solvent in a solution, ΔP, is equal to the mole fraction of the solute, Xsolute, multiplied by the vapor pressure of the pure solvent, P°.

$\Delta P=X_{solute}\times P^0$

ΔP and P⁰ are given:

ΔP = 1.39mmHg

P⁰ = 55.32mmHg

1. Mole fraction of solute

Thus, you can calculate Xsolute:

$1.39mmHg=X_{solute}\times 55.32mmHg\\\\X_{solute}=0.02513$

2. Moles of solute

Now you can calculate the number of moles of water and the number of moles of solute.

Number of moles of water = mass in grams / molar mass

Number of moles of water = 1,250g/18.015 (g/mol) = 69.3866mol

Xsolvent = 1 - Xsolute = 1 - 0.02513 = 0.97487

Xsolvent = moles of solvent / moles of solution

0.97487 = 69.3866mol / moles of solution

moles of solution = 71.1752mol

moles of solute = moles of solution - moles of solvent = 71.1752mol - 69.3866mol = 1.7886mol

3. Mass of urea

Formula:

Mass = number of moles × molar mass

Mass = 1.7886 mol × 60.06 g/mol = 107.42 g

You must round to 3 significant figures: 107 g

8 0

2 years ago

How does natural selection lead to evolution

Georgia [21]

Answer:

Natural selection is a process where organisms that are better adapted to an environment will survive and reproduce. This means that the advantageous alleles of this variant organism are passed on to offspring. Over many generations, the process of natural selection leads to evolution occurring.

7 0

2 years ago

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