Which of the following life formsis a vertebrate?

a turtle
a mosquito
aflower plant
or an octopus?

http://en.wikipedia.org/wiki/Turtle

A turtle has about sixty bones attached to the shell.

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The spaces in the spongy bone are filed with ?

To determine which of the given life forms is a vertebrate, we need to understand what a vertebrate is. Vertebrates are animals that have a backbone or a vertebral column. They typically have an internal skeleton made up of bones or cartilage, which provides support and protects their internal organs.

Looking at the options provided, we can analyze each one to see if it fits the criteria of being a vertebrate:

- A turtle: Turtles are vertebrates. They have a bony or cartilaginous shell, which is made up of modified ribs and vertebrae. Turtles have a backbone, making them a vertebrate.

- A mosquito: Mosquitoes are insects and belong to a group called arthropods. Arthropods, including insects, do not have a backbone and are therefore not vertebrates.

- A flower plant: Plants, including flower plants, do not possess a backbone or a vertebral column. They have a different structure known as a vascular system, which allows them to transport water, nutrients, and sugars. Plants are not vertebrates.

- An octopus: Octopuses belong to a group called cephalopods. They do not have a backbone or a vertebral column, making them invertebrates.

From the given options, only a turtle is a vertebrate.