Answer:
2
Explanation:
Only once
Twice
Many times
Image result for In what era did the humans appear
Hominins first appear by around 6 million years ago, in the Miocene epoch, which ended about 5.3 million years ago. Our evolutionary path takes us through the Pliocene , the Pleistocene , and finally into the Holocene, starting about 12,000 years ago.
Answer: Sorry if I'm wrong.
Explanation: The hypothalamus is the link between the endocrine and nervous systems. The hypothalamus produces releasing and inhibiting hormones, which stop and start the production of other hormones throughout the body. The hypothalamus plays a significant role in the endocrine system.
Answer:
B
Explanation:
Answer:
The animals of the Earth and their environment the history of life on Earth how people and animals interact and live how living organisms interact and function Biology answers many questions, but its main focus is how living organisms interact and function.
Explanation:
Biology is the subject focused on the study of living organisms.
Biology, as a scientific discipline, primarily focuses on the study of living organisms and their interactions with the environment. Its main objectives include understanding the processes of life, such as growth, reproduction, adaptation, and evolution. Biology seeks to unravel the complexities of cells, genetics, physiology, and ecosystems, aiming to explain how living organisms function at various levels, from molecular to ecological.
While it addresses diverse questions, its central focus is to elucidate the mechanisms underlying life, biodiversity, and the interconnectedness of all living things, providing insights into how life forms have developed and continue to thrive on Earth.
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B. Devonian
C. Cambrian
D. Carboniferous
The correct answer is option B. Devonian.
The amphibians are the tetrapods (having four limbs), which can live in both water and land, but for reproduction purpose, they need water and early life is exclusively aquatic. The amphibians are known to be evolved from lobbed finned fishes around 370 million years ago in the Devonian period of the Paleozoic Era.