What is the missing word? __________ substances can move into or out of cells by diffusion.

Answer: I'm not entirely certain, but I believe it is D: types of nitrogenous bases.

Answer:

The continuation of the question is

Which explains the reasoning behind this fact?

Their DNA comprises different codon sequences.

It is composed of four distinct bases.

Kai received more proteins from one parent compared to the other.

The varied inheritance of amino acids from her parents led to the difference.

The correct response is Their DNA comprises different codon sequences.

DNA, or Deoxyribonucleic acid, consists of nitrogenous base pairs, a phosphate group, and deoxyribose sugar. The amino acids formed from these bases result in varied expression of traits. This variation stems from the diversity in coding sequences since there are over 60 distinct codon combinations. This accounts for the slight differences between Kai and her parents.

Answer:

Ribosomes, Cell membrane

Explanation:

Ribosomes serve as the sites where proteins are synthesized. Therefore, they are referred to as the protein production factories of a cell. Since enzymes are a type of protein, their synthesis occurs within ribosomes.

The cell membrane functions as the boundary that surrounds the cell or separates it from its environment.

To exit the cell and enter the external environment, an enzyme must navigate through both the ribosomes and the cell membrane.

Answer:

When Dan "threw out his back", the injury occurred in the lumbar area of the spine, impacting the sciatic nerve and resulting in pain that radiates to the back of his right leg. A possible imaging technique for diagnosis is nuclear magnetic resonance imaging.

Explanation:

Physical activities, particularly lifting heavy items, can lead to lower back injuries which may manifest as muscle strain, tears, or damage to intervertebral discs in the lumbar region.

In Dan's situation, lifting furniture may have led to:

• A bulging disc, categorizing it as a herniated disc.
• Lumbar disc hernias may compress the sciatic nerve.
• Injuries to the sciatic nerve can result in various symptoms like pain or neurological issues including tingling, numbness, or sharp pain in the area supplied by that nerve.
• Dan feels pain in the posterior of his right leg due to the involved sciatic nerve.

Which imaging technique would you recommend for diagnosing spinal issues?

The most effective imaging method to detect this injury and assess spinal issues is magnetic resonance imaging, as it can visualize both bone and soft tissue structures (such as cartilage and muscle) in the affected region.

X-rays primarily reveal bone structures, useful for diagnosing fractures or structural changes, but lack the ability to show the status of ligaments, intervertebral discs, or muscles.

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