Answer:
A.)are ectothermic organisms with variable body temperatures.
Explanation:
Invertebrates animal are animals that lack a backbone, Land invertebrates include insects,spiders, centipedes ,coelenterate, an arthropod, mollusc and the rest.
Ectotherms are also called called cold-blooded animal because their bl body temperature regulation is dependendent on external sources, such as sunlight or a heated rock surface. Some of the examples of ectotherms are fishes, amphibians, invertebratesand reptiles. The aquatic ectotherms body temperature is usually compare closely to the temperature of the surrounding water
Ectothermic species that lives in temperate regions usually experience rapid and potentially stressful changes in body temperature simply because of weather changes even among amphibians there is variation in their temperature
It is believed that naturally occurring periods of temperature variation negatively impact amphibian health.
Cells ?I believe :) hope this helps
The expression or appearance of a particular trait is known as an organism's phenotype
The term "phenotype" describes an organism's observable physical characteristics, such as its appearance, growth, and behavior. The genotype, or collection of genes that an organism possesses, as well as environmental impacts on these genes, together determine its phenotype.
Earwax type, height, blood type, eye color, freckles, and hair color are phenotypic examples in humans. A phenotype is more than just a physical characteristic. A phenotype may also include a person's behavior. The dog breed known as the Border Collie, which was developed to herd sheep, serves as an illustration of inherited behavior.
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Eukaryotes have nucleus and protaryotes have plant calls that’s the difference
