Problem 1 - Biology: The Dynamic Science

Question

Major contributors to the axes of the animal body are the: a. sperm and egg cytoplasm. b. sperm and egg chromosomes. c. ribosomes and mitochondria d. egg nucleus and yolk. e. pigments.

Step-by-Step Solution

Answer

The major contributors to the axes of the animal body are the 'sperm and egg cytoplasm'.

Step 1: Understand the process of axis formation

Research about the process of axis formation which occurs very early in the development of an animal embryo. These initial stages are critical in establishing an organized structure of the animal body.

Step 2: Evaluate the role of each option in axis formation

Consider the role of sperm and egg cytoplasm, sperm and egg chromosomes, ribosomes and mitochondria, egg nucleus and yolk, and pigments in the process. Evaluate how each option may contribute to the formation of the axes of the animal body.

Step 3: Make the selection

Based on your understanding of the process of formation of axes in the animal body and evaluation of the roles of each option, make the selection. In this case, the major contributors to the axes of the animal body are 'sperm and egg cytoplasm', because it's during the fertilization and merging of sperm and egg, and the resulting movement and distribution of the cytoplasm, that the early development of anterior-posterior and dorsal-ventral axes are determined.