« previous next »

Author Question: The loss of ventral spines by modern freshwater sticklebacks is due to natural s (Read 721 times)

penguins

  • Hero Member
  • *****
  • Posts: 903
on: Jul 12, 2013
The loss of ventral spines by modern freshwater sticklebacks is due to natural selection operating on the phenotypic effects of Pitx1 gene
A) duplication (gain in number).
B) elimination (loss).
C) mutation (change).
D) silencing (loss of expression).


Millan

  • Sr. Member
  • ****
  • Posts: 368
Reply #1 on: Jul 13, 2013
I know it's D, we did this last week ;)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

penguins

  • Hero Member
  • *****
  • Posts: 903
Reply #2 on: Jul 18, 2013
Thank you, thank you!!


« previous next »
 

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Natural seletion Natural seletion
Oil and Natural Gas Production from More Wells in Smaller Areas Oil and Natural Gas Production from More Wells in Smaller Areas
This CNG pump is capable of supplying compressed natural gas at either 3,000 PSI or 3,600 PSI. The ... This CNG pump is capable of supplying compressed natural gas at either 3,000 PSI or 3,600 PSI. The ...
Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ... Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ...
Modern Massage Therapy Timeline Modern Massage Therapy Timeline
Natural gas is a cleaner fuel than coal Natural gas is a cleaner fuel than coal
Video: Types of Shock (Part 2 of 2)

For a complete list of videos, visit our video library