Can a shark swim backwards?

Can a shark swim backwards?

Unlike fish, sharks cannot stop suddenly or swim backwards. A shark’s pectoral fins cannot bend upwards like a fish, limiting its swimming ability to forward motion. If a shark needs to move backwards, it uses gravity to fall, not swim backwards.

Is a contraction one word or two?

Contracted words count as the number of words they would be if they were not contracted. For example, isn’t, didn’t, I’m, I’ll are counted as two words (replacing is not, did not, I am, I will). Where the contraction replaces one word (e.g. can’t for cannot ), it is counted as one word.

What animals change colors?

Furthermore, odds are that when you do see a chameleon change its color, it’s probably trying to broadcast its mood rather than evade predators. Nevertheless, the animal kingdom is filled with amazing color-changers, several of which dramatically outdo the chameleon clan in the skill of rapid-fire camouflage.

What does it mean when a cousin is removed?

You and your first cousins are in the same generation (two generations younger than your grandparents), so the word “removed” is not used to describe your relationship. The words “once removed” mean that there is a difference of one generation.

Which is the largest internal organ in the human body?

The largest internal organ is the liver. It is also the heaviest organ, with an average of 1.6 kilograms (3.5 pounds). The largest external organ, which is also the largest organ in general, is the skin.

Why do you hear the ocean in a shell?

There is a popular folk myth that if one holds a seashell—specifically, most often, a conch shell—to one’s ear, one can hear the sound of the ocean. The rushing sound that one hears is in fact the noise of the surrounding environment, resonating within the cavity of the shell.

Are most cranial nerves paired?

The twelve pairs of cranial nerves are continuous with the brain and are numbered from anterior to posterior, according to their attachments to the brain. CN-I is attached to the cerebral hemispheres. CN-II is attached to the central cerebrum via the optic chiasma (hypothalamus), CN-III and IV to the midbrain.

How big are lemmings?

Lemmings weigh from 30 to 110 g (1 to 4 oz) and are about 7 to 15 cm (3 to 6 in) long. They generally have long, soft fur, and very short tails. They are herbivorous, feeding mostly on leaves and shoots, grasses, and sedges in particular, but also on roots and bulbs.