Question 1

Which process is responsible for the irreversible commitment of a cell to a particular developmental path, resulting in a specific cell type?

Accepted Answer

Cell determination

Question 2

During animal development, which structure forms first and gives rise to the brain and spinal cord?

Accepted Answer

Neural tube

Question 3

Which of the following is NOT a function of stem cells in animals?

Accepted Answer

Producing flowers

Question 4

What is the main role of morphogens in development?

Accepted Answer

Providing positional information via concentration gradients

Question 5

Which equation best represents the relationship between morphogen concentration and cell fate?

Accepted Answer

$$C(x) = C_0$ e$$^{-kx}$$

Question 6

Which germ layer gives rise to the epithelial linings of the digestive tract, liver, pancreas, and lungs?

Accepted Answer

Endoderm

Question 7

In plants, which group of cells is responsible for lifelong growth at the roots and shoots?

Accepted Answer

Meristems

Question 8

Which of the following best describes genetic equivalence?

Accepted Answer

Cells have the same genes but express them differently

Question 9

During fertilization in humans, what prevents additional sperm from fusing with the egg?

Accepted Answer

Cortical reaction causing membrane depolarization

Question 10

Which sequence correctly represents the genetic hierarchy in pattern formation?

Accepted Answer

Morphogens → gap genes → pair-rule genes → segment polarity genes → Hox genes → effector genes

Question 11

Which equation describes the exponential increase in cell number during cleavage, assuming each division doubles the cell count?

Accepted Answer

$$N = 2^n$$

Question 12

Which structure in the blastocyst gives rise to the organism?

Accepted Answer

Inner cell mass

Question 13

Which of the following is a major difference between plant and animal development?

Accepted Answer

Animal cells migrate during development, plant cells do not

Question 14

Which hormone is secreted by the implanted blastocyst to maintain pregnancy?

Accepted Answer

hCG

Question 15

Which of the following is NOT a function of apoptosis during development?

Accepted Answer

Formation of the neural tube

Question 16

Which plant structure is formed from the radicle during embryogenesis?

Accepted Answer

Root

Question 17

Which of the following best describes the function of Hox genes?

Accepted Answer

They determine segment identity along the anterior-posterior axis

Question 18

Which tissue type in plants is responsible for transporting water and nutrients?

Accepted Answer

Vascular tissue

Question 19

Which equation represents the rate of cell division if the cell cycle duration is $$T$$ and the number of cells is $$N$$?

Accepted Answer

$$\frac{dN}{dt} = \frac{N}{T}$$

Question 20

Which of the following is a real-world example of differential gene expression leading to cell differentiation?

Accepted Answer

Stem cells in bone marrow differentiate into red blood cells due to chemical signals

Development, Stem Cells, and Cancer: An Overview of Multicellular Development in Animals and Plants

Study Guide - Practice Questions