Answer:
Australopithecus afarensis
Explanation:
Lucy was the first Australopithecus afarensis species found. It represents 40% of the skeleton of a female. It was discovered in Africa in 1974, near the village Hadar in Awash valley of Afar triangle, Ethiopia and is dated about 3.2 million years ago. Notable characteristics includes rib cage and plant based diet, cranial specimens, pelvic girdle, ambulation etc.
Answer:
The kind of muscle contraction that occurs when you try to lift a box but it's to heavy and it can't be moved from the floor is called: Isometric Contraction.
Explanation:
Isometric contraction consists of having a muscle activated but to maintain it at a constant length, instead of shorten or lengthen it.
Answer: Humans develop physically to adapt to their environments.
Explanation: I'm not an expert on this subject but our physical traits have been evolving ever since the first humans. Hair and such have helped us adapt to our world.
Answer:
Sun and Moon
Explanation:
the sun's tide-generating force is about half that of the moon, and the moon is the dominant force affecting the Earth's tides.
Origin of species by means of natural selection
