In 1999,researchers Found That They Could Create Hybrid Embryos Between

question 42

Multiple Choice

In 1999,researchers found that they could create hybrid embryos between two species of sea urchin that had been separated for 10 million years.By treating eggs to remove the jelly coat,the sperm of the other species was able to fertilize.What step of the fertilization process is normally blocked,preventing hybridization between these species?

• A)Sperm penetration
• B)Membrane fusion
• C)Egg activation
• D)Nuclear fusion

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Definitions:

Diverse Morphology

Refers to the variation in form and structure among organisms or parts of organisms within a population, species, or group.

Filaments

Long, thin structures found in many organisms, such as the stamen of flowers or muscle fibers, and are often involved in structural or motility functions.

Sheets

Thin, broad pieces of material, such as metal, paper, or fabric, used for various purposes.

Pseudopodia

Temporary, foot-like extensions of a cell's surface, used for movement and ingestion by some single-celled organisms.