Answer:
A quarter of the sample.
Explanation:
Let the quantity at the beginning be T. If the element has a half-life of 1,000 years, it means that after 1000 years, T/2 (which represents half the initial quantity available) would have decayed, remaining T/2.
After another 1000 years (making 2000 years), T/4 (which represents have of the quantity left after the first 1000 years) would have decayed, remaining T/4.
This means that only a quarter of T would be left after 2000 years.
The correct answer is letter A. The statement above is true that when animals eat the same type of food they are categorized in the same niche. Niches are ecological communities or ecosystems where specific organisms thrive and fit. Their evolutionary processes are also a result of these different niches found within the environment.
Dislocations is a musculoskeletal injury in which there is a partial or temporary separation of the bone ends as well as partial tearing of the supporting ligaments .
4 types of musculoskeletal injuries includes repetitive strain injuries (RSIs), repetitive motion injuries, cumulative trauma disorders (CTDs), work-related upper limb disorders (WRULDs).
Most common type of musculoskeletal injury is Muscle Strains, back pain, and arthritis . Muscle strains can happen due to improper technique of lifting heavy objects, lifting too much weight at one time, and repetitive movements. The key symptoms of a muscle strain are sudden pain that worsens while contracting the muscle, swelling and bruising, loss of strength and range of motion. People often report the sensation of pain as the feeling of being "stabbed." When muscle is initially injured, significant inflammation and swelling occurs.
To learn more about musculoskeletal injury ,here
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