Small fish absorb minute amounts of pesticides.
The birds of prey consume many fish to satisfy their dietary needs. The pesticides accumulate and concentrate in the bird, continued exposure overwhelm the predator.
The correct word to fill the gap would be indirect.
In other words, an indirect survey makes use of evidence, such as the footprints left behind by animals, to follow animals that are difficult to track.
Ecological surveys are of 2 types:
Direct ecological surveys have to do with studying phenomena directly and recording whatever that is observed.
Indirect surveys involve an indirect way of studying phenomena. The signs left by phenomena are observed and logically used to make deductions about such phenomena.
More on ecological surveys can be found here: brainly.com/question/1182023?referrer=searchResults
<h2>Ovulation</h2>
Explanation:
Women are born with approximately one to two million ova while female fetuses actually have far more egg cells when they are in the mother’s womb—sometimes as many as six or seven million eggs
- When egg cells are immature they are referred to as oocytes
- By the time a woman reaches puberty, there are only a small fraction of oocytes left—usually about 300,000
- During the reproductive lifespan, only about 500 of a woman’s eggs are ovulated
- The remaining eggs that are left behind die out during menopause
- Egg death is a natural part of the cycle of the female reproductive system so prior to menopause, women typically lose a thousand or so eggs every month
Answer:
1981
Explanation:
<em>"A new era in space flight began on April 12, 1981, when Space Shuttle Columbia, or STS-1, soared into orbit from NASA's Kennedy Space Center in Florida."</em>
