Answer:
During the Devonian period which occurs 375 million years ago, gills are present in the fossil of tetrapods.
Explanation:
Gills present in tetrapods which able the marine animals to breathe inside water but with the passage of time the sac which is present around the gills convert into lungs and these tetrapods are able to live on the land. Examples of tetrapods are frog, lion, birds and salamander etc.
Answer:
Keratin has two main functions: to adhere cells to each other and to form a protective layer on the outside of the skin. In epithelial cells, keratin proteins inside the cell attach to proteins called desmosomes on the surface. The desmosomes act as anchors, holding the cells together.
The best and most correct answer among the choices provided by the question is G1: follows cell division. I hope my answer has come to your help. God bless and have a nice day ahead! Feel free to ask more questions.
<span>The specific heat of the metal is 0.5 cal/ (0C.g). This means the energy needed is 0.5 cal to raise the heat of 1 gram of metal by 1 degree C. Therefore, the energy needed to raise 100 g of the metal by 20 degrees C is:
0.5 * 20 * 100 = 1000 cal.
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Answer:
Colias Philodice
Explanation:
Following the dichotomous key:
The hindwings are rounded so it says to go to the 3. The options are orange with black wings or yellow with black wings. It has yellow on the wings so that means it is Colias Philodice.
Hope this helps!!! :)
