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astra-53 [7]
3 years ago
6

On an expedition to a barren land that had witnessed volcanic activity, geologists noticed heavy lichen growth on some of the ha

rd lava. In other areas, lichens were replaced by grasses. After many years, the geologists expect to find the area filled with full-grown hardwood trees, grasses, and shrubs. What is this process called?
A.Succession
B.Mutualism
C.Competition
Biology
1 answer:
Ksenya-84 [330]3 years ago
6 0
I think the correct answer from the choices listed above is option A. The process that is being described above is called succession. Ecological succession is the process of change in species structure in a community as time goes by. Hope this answers the question.
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How is modern earth different from earth over 4 billion years ago?
igor_vitrenko [27]

Earth and its atmosphere are continuously altered. Plate tectonics shift the continents, raise mountains and move the ocean floor while processes not fully understood alter the climate. Such constant change has characterized Earth since its beginning some 4 billion years ago.

5 0
3 years ago
How did the findings from Hershey and Chase’s bacteriophage experiments likely influence the Meselson-Stahl experiment, and how
Mademuasel [1]

Answer:

c, just took the test

Explanation:

7 0
2 years ago
Animal cells are placed in an isotonic solution. THEN, additional amounts of solute are added to the solution. What happens to t
Nitella [24]

Answer:

The animal cell will shrink due to loss of water to the external solution

Explanation:

An isotonic solution is that solution which has equal concentration with its external environment. Hence, no net movement of water occurs in an isotonic solution since there is no concentration gradient. Therefore, if an animal cell is placed in an isotonic solution at first, no net movement of water occurs because the intracellular and extracellular concentrations are at equilibrium.

However, if more solutes are added to the solution, it makes the solution HYPERTONIC to the cell i.e greater in concentration. This creates an osmotic gradient and causes water to move out of the animal cell into the solution in accordance to osmotic principles (movement of water from a low concentration of solute to high concentration of solute). This causes the animal cell to likely SHRINK.

3 0
2 years ago
Match these terms with their descriptions
Pani-rosa [81]
1. water temperature of lakes and rivers rise - nuclear power plant. Water is used as a coolant to maintain the temperature of nuclear reactors. and the resulting water is warmed up.
<span>
2.carbon monoxide pollutes air - </span> internal combustion engine. Internal combustion engines release fumes of carbon monoxide.
<span>
3. fly ash of soot in air - </span>coal-burning power plant. Coal burning plants release  ash produced in small dark flecks.<span>

4. soil contamination of water resources - </span>DDT spraying in agriculture. DDT washes off agricultural land into water resources.
<span>
5. sewage contamination of water resources -</span>population density. Urban areas produce a low of sewage, which is usually treated before being disposed of in rivers or the sea.
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6. excess plant growth in the lakes or rivers - </span>phosphate detergents. In many rivers, algal growth is limited by phosphate. Once excess phosphate is released to rivers, exponential algal growth can occur.<span>

7.reduces farmland and plant life to cleanse air - </span>urban sprawl. Urban sprawl uses up land for houses in an inefficient manner that could have been used for farming or natural areas.
<span>
8. studies air,water, and land - </span>ecologist. Ecology is the study of <span>relations of organisms to one another and to their physical surroundings.</span><span>








</span>
8 0
3 years ago
Assuming that both parents are heterozygous for the gene that causes the disease, what is the probability that the second child
LiRa [457]
The independent assortment of genes is a principle of Mendel and of genetics. Since humans are diploid organisms (they have 2 copies of their genetic information), we have that each gamete carries one of the two available alleles for each feature. These gametes are created in equal proportions.

We have that both parents are heterozygous for a feature, lets say H. Thus, their genotype is Hh. Hence, the child will get with probability 50%=1/2 H from the father and 50%=1/2 h from the father; same from the mother. By doing a Punnett square, we get that there is 1/4 chance that the child is HH, 1/2 chance that it is Hh and 1/4 that is hh. Since the disease is recessive (so both alleles are needed), we have that the chance that the kid has the disease is 1/4.
8 0
3 years ago
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