Answer:
a. Exoskeleton made of chitin
Explanation:
Arthropods are invertebrate animals with articulated locomotor organs, which is the main characteristic of this phylum. The articulated paws allow the animal to perform various movements, very well defined and elaborate. This feature gives these animals not only efficient locomotion, but also aids in their defense and food capture.
They have another striking feature as well, which is the diversely segmented body, but always covered by a chitin cuticle, which represents its exoskeleton. Some have a calcareous shell outside the chitinous exoskeleton, such as crustaceans.
If there was a larger population of rabbits than dandelions, and the rabbits only ate the dandelions, they would eventually run out. then the rabbits would start to die too, since their main food source is gone.
Answer:
uniformitarianism, Fossil groups, 48 million years ago.
Explanation:
- Uniformitarianism is the doctrine of uniformity that assumes that same environmental laws and process operate till date that has also occurred on the past but not with the same uniformity. Unlike the atmospheric that is short-lived and sudden changes over the period of time.
- William Smith was a geologist who has noticed a certain type of fossil in a certain layer of sedimentary and igneous rock. A similar layer of strata could be found in the areas that were further apart.
- The Permian period was from 229 to 251 million years and was the last period of the paleozoic era and is recorded for the last major extinction in the history of life in earth and it lasted for 48 million years.
Explanation:
If the concentration of molecules outside the cell is very high relative to the internal cell concentration, the rate of diffusion will also be high. If the internal and external concentrations are similar (low concentration gradient) the rate of diffusion will be low.
1. traits
2. genes
3. DNA
4. environment
5. 23
6. haploid
7. half
8. fertilization
9. 46
10. zygote
11. half
12. randomly
13. different
Hope this helps a little :)
