This is true.
Birds evolved and adapted these features over time.
Answer:
1. 20 units
2. 4 units
Explanation:
In an ecosystem, energy is transferred from one organism occupying a trophic level to another as they feed on one another. The amount of energy that is being transferred as the chain progresses is called ECOLOGICAL EFFICIENCY. According to this question, the ecological efficiency at each trophic level of the ecosystem is 20%. This means that about 20% of energy units will be transferred to the next trophic level.
If the green plants of the ecosystem capture 100 units of energy, the amount of energy that will be available to support herbivores (plant eaters) is: 20% × 100units i.e. 20/100 × 100 = 20 units.
Also, the amount of energy that will be available to support carnivores subsequently will be 20% of 20 units i.e. 20/100 × 20 = 4 units.
Answer:
Gene mutations can be caused by environmental factors such as ultraviolet radiation from the sun, or carcinogens due to ionizing radiation. Mutations can also occur if an error is made as DNA copies itself during DNA replication, mitosis and meiosis.
Explanation:
Answer:If a teenager has low self asteem , they are more likely to participate in risky behaviour. This could be for many reasons such as feeling the need to fit in and be like others , and as you feel bad about yourself you feel more pressured to show off to people to make you feel better about yourself as others are taking interest in you x
Explanation:
The answer needed to complete the statement above is the External Urethral Sphincter. It a skeletal muscle, in contrary to the internal urethral sphincter, whose location is at the urogenital diaphragm. Its function is the voluntary control of urine in the bladder.
