Question

how many chromosomes are in a normal diploid (2n) human somatic cell? *
32
46
23
64

what is the claim for this unit? *
cells divide through mitosis and meiosis
matter is made of atoms that are broken down and transferred into other molecules then used by organisms
cells divide through gene splicing
10 percent of energy is transferred between trophic levels

what is the reasoning for this unit? *
cells must divide in order for organisms to repair and grow.
if cells didnt divide organisms would still repair and grow
since organisms are made up of matter, they go through mitosis
organisms get the matter they need in/out of the cell through the cell membrane.

Explanation:

Identify human somatic chromosome number

Using the Haploid and Diploid knowledge point, we determine the chromosome count. Somatic cells are diploid (\(2N\)), containing two sets of chromosomes. In humans, one set (\(N\)) consists of 23 chromosomes, making the total diploid number \(2N = 46\).

Determine the unit claim

Using the Cell Division knowledge point, we evaluate the claim. The questions focus on chromosome numbers and cell division. The central claim that unifies these topics is that cells divide through mitosis and meiosis.

Determine the unit reasoning

Using the Cell Division knowledge point, we identify the biological purpose. Cells must divide so multicellular organisms can repair damaged tissues and grow in size.

Answer:

Question 1

• 32
• 46 (Correct answer)
• 23
• 64

Question 2

• Cells divide through mitosis and meiosis (Correct answer)
• Matter is made of atoms that are broken down and transferred into other molecules then used by organisms
• Cells divide through gene splicing
• 10 percent of energy is transferred between trophic levels

Question 3

• Cells must divide in order for organisms to repair and grow. (Correct answer)
• If cells didn't divide organisms would still repair and grow
• Since organisms are made up of matter, they go through mitosis
• Organisms get the matter they need in/out of the cell through the cell membrane.