The Graph Below Shows the Rate of Cell Division in a Developing

question 48

Multiple Choice

The graph below shows the rate of cell division in a developing frog embryo.

Why does the rate of growth decrease dramatically after the point indicated by the arrow?

• A) At this point,development switches from rapid cell growth to cell differentiation and migration.
• B) The arrow indicates when the embryo begins to run out of its internal food source and must find another source to continue developing.
• C) This is when fertilization occurs.Before this point,the single-celled egg was growing quickly as it stored food.After this point,growth slows for the more deliberate process of development.
• D) At the time indicated by the arrow,the trophoblast separates from the inner cell mass and the two tissues begin to divide at different and slower rates.

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Definitions:

MPC

Marginal Propensity to Consume, which represents the proportion of an increase in income that gets spent on consumption instead of being saved.

Investment Spending

Expenditures on new physical assets like buildings, machinery, and equipment, contributing to future production capacity.

GDP

Gross Domestic Product, a monetary measure of the market value of all final goods and services produced in a specific time period.

MPC

Marginal Propensity to Consume, the proportion of additional income that a consumer spends on purchasing goods and services, rather than saving.