It’s the amoeba. Hope this helps!!
Amphibians are ectothermic because they cannot control their body temperature.
Answer:
5 lumbar vertebrae
Explanation:
As you can see in the image I annexed, a typical adult skeleton has 5 lumbar vertebrae (colored in red), they are cylindrical bones located between the rib cage and the pelvis, they are the largest segments of the vertebral column. These vertebrae carry all of the upper body’s weight, they protect the spinal cord and nerves in the vertebral canal, they also provide flexibility and movement to the trunk region.
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DNA is the ultimate control of cell's productions. So A.
The correct option is (A) Endoskeleton.
Endoskeleton is common between Echinoderms and chordata class.
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What are the characterstics of Echinoderms?</h3>
- They resemble stars and can be elongated or spherical. They only have spiky skin since they are aquatic organisms.
- They exhibit organ system level organization and an open circulatory and digestive system. They have three lobes.
- Their gills or the cloacal respiratory tree are how they breathe.
- They have a simple radial nerve system and no excretory system. The body is unsegmented, with no discernible head.
- Both asexual and sexual gametic fusion and regeneration occur during their sexual reproduction.
- During indirect development, external fertilization takes place.
- They are capable of regeneration.
- Their sensory systems are not fully formed. Some of these include chemoreceptors, tactile organs, terminal tentacles, etc.
Learn more about the Echinoderms with the help of the given link:
brainly.com/question/6472932
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