Select all that apply.
which of the following are vertebrates?
starfish
earthworms
tunicates
crab
amphibians
lancelets
octopus
grasshopper

The correct answer is Amphibians.

Explanation:

An animal is considered as vertebrate when they have vertebral column that is extended from head to tail which protects the spinal cord in the body and also provide structural support. Those animals which do not have this vertebral column are called invertebrate.

Vertebrates comes under the sub phylum vertebrata which includes fish, mammals, birds, mammals and amphibians. Sub phylum vertebrata comes under the phylum chordata which includes both vertebrate and invertebrate.

So in this question only amphibians have vertebral column and not other so amphibians are the only vertebrates.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.