That the predation goes against gravity, the prey has powerful muscles that tense against the extraction and the soil is a rough source of friction are reasons why it is difficult for a bird to pull an earthworm out of the ground. The bird employs its beak for pulling and its legs for anchoring. It has to let go, and try all over again, when the length of the exposed worm equals the avian height.
Because if you make Tali kill herself in mass effect 3 it's funny
The setae point backwards. They cling to the surroundings of the worm as it contracts its muscles to pull it along. They are what makes pulling an earthworm straight out of the ground difficult. Think of them as little hooks.
'cos they kinda stick to the ground
no
to anchor themselves to the ground when a bird tries to pull them away
to anchor themselves to the ground when a bird tries to pull them away
Since the fibrous roots are not deep rooted, it is easy to pull out such plants from the ground as compared to those with tap root system.
Because glass is a smooth surface. Worms move by using microscopic hairs on their bodies to provide traction so they can pull themselves forward.
a bird sharply pulls down its wings as it did when it pushed off the ground
It is a push and a pull. When you move your body towards the ground, it is a pull. A pull as in a pull to the ground. It is a push when you are moving away from the ground.
Yes, you are allowed to pull these out of the ground. But you can not pull OB stakes out of the ground.
They may possibly face the anterior which explains why there is resistance trying to pull them from the soil.