A New Male Birth Control?

How does Vasalgel prevent pregnancy?

• It kills sperm before they can reach the egg.

• It physically blocks sperm from mixing with semen.

• It stops the production of semen in the body.

• It changes the male's hormone levels to prevent sperm creation.

What was a significant outcome of the Rhesus monkey study on Vasalgel?

• All the treated monkeys developed severe health problems.

• The gel was easily flushed out, making it ineffective.

• None of the treated monkeys fathered a baby, even after mating with fertile females.

• The monkeys showed increased aggression after receiving the treatment.

What is a remarkable ability of Hydra, a freshwater animal?

• They can change their color to match their surroundings.

• They can regrow entire body parts from tiny tissue chunks.

• They can survive for months without food or water.

• They can communicate using complex sound patterns.

What did researchers discover about the role of physical structure in Hydra regeneration?

• Chemical signals are more important than physical structure for regeneration.

• Only square-shaped tissue chunks can regenerate correctly.

• The alignment of actomyosin fibers within the tissue guides proper regeneration.

• Hydra can regenerate perfectly regardless of the initial tissue shape.