How is unsafe water related to humans’ health?
Unsafe water can have a significant impact on human health. It can cause a range of waterborne diseases such as cholera, typhoid, dysentery and hepatitis A, all of which can cause severe illness and even death. Contaminated water sources may also contain various chemicals, heavy metals, or industrial waste, which may harm our health by causing genetic mutations, organ damage, and even cancer. Moreover, unsafe water can also be a contributing factor to malnutrition, as it’s essential to have clean water for food preparation, hygiene practices, and crop irrigation. In summary, the consumption of contaminated water and lack of access to clean water may lead to a range of health problems and pose a serious threat to human life.
The genetic engineering of crops is a controversial and debated issue in the media and press. Which of the following would be an argument in favor of the genetic engineering of corn?
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improved nutritional content
increased crop yields
reduction of pesticide use
all of these
All of these could be potential arguments in favor of genetic engineering of corn.
Look at the food web shown below. Which organisms get energy from producers?
squid
zooplankton
sperm whales
phytoplankton
zooplankton.
Some people have attached ear lobes and some people have free ear lobes. The differences in these traits are caused by
differences in environment.
differences in personality.
differences in diet.
differences in genes.
The differences in these traits are caused by differences in genes.
Relationships between organisms may be beneficial or detrimental. Which of the following examples shows a relationship in which both organisms benefit?
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A tick attaches itself to the skin of a dog and takes a blood meal.
A female black widow spider Latrodectus mactans mates with a male spider; then, she consumes him.
An African wasp Certolsolen arabicus pollinates a fig tree Ficus sycomorus as it eats the tree's nectar.
A species of hyena known as the aardwolf consumes termites for nourishment.
An African wasp Certolsolen arabicus pollinates a fig tree Ficus sycomorus as it eats the tree's nectar is an example of a relationship in which both organisms benefit. The wasp benefits by getting food from the fig tree, and the fig tree benefits by getting pollinated by the wasp.
Many animals, including the brittle star and snapping shrimp, make their homes inside sea sponges. Here, the animals not only find safe shelter, but also have a constant flow of well-oxygenated water, and may even eat the substance produced by the sponges. The sponges are not affected in any way by the presence of these animals.Which type of relationship does this represent?
parasitism
predator/prey
mutualism
commensalism