Answer:
The answer is A
Explanation:
The hydrosphere provides almost all the water at or near the earth's surface. It is important to the biological and geological processes as it is a continuous cycle of recycling water between the oceans and atmosphere.
Answer:
Once a vital plant that many humans or animals need go extinct, many of them will die due to starvation and or shelters they build might not be able to be built due to the extinct plant being gone. As an example, If trees went extinct, humans wouldn't be able to live. One, because trees help filter the air for us humans to breath, wood is a very vital supply too. Wood is used for paper, homes, and even appliances.
Explanation:
Answer:
D. a decrease in the # of chromosomes
Explanation:
Meiosis, also called reduction division, division of a germ cell involving two fissions of the nucleus and giving rise to four gametes, or sex cells. According to Britannica and BiologyDictionary.
Answer:
The warming of Earth, accompanied by the seas covering the land, created the proper conditions for multicellular organisms to form.
Explanation:
OPTIONS:
a. Bear populations would decline. b. Riparian vegetation would decline. c. Elk populations would decline.
Answer:
c. Elk populations would decline.
Explanation:
The gray wolf can be regarded as a keystone predatory species. The absence or decrease of the population of a keystone predator in an ecosystem largely has a negative impact on the balance of the ecosystem, as well as the population of other organisms in that ecosystem.
In the Yellowstone ecosystem, Elk population is controlled by the gray wolf, as they are hunted down by the gray wolf. As stated in the question, these elks that are being hunted by gray wolf, their carcasses serve as sources of food for the ravens, bears, and the eagles. This means, the presence of wolf in the ecosystem would make enough food available for these animals as their population increases.
What to be expected as the gray wolf is returned is that, the population of elk would decline, since gray wolf would hunt them down. Also, since elk population feed heavily on riparian vegetation, these vegetation would increase rather than decline.
