The main source of organic matter in soil is

2 answers:

6 0

The correct answer is bacteria. Bacteria abundant in soil is the main source of its organic matter. This is because bacteria release energy in their systems which causes the soil to be more fertile and more capable of sustaining plant material. Without bacteria general processes of soil formation will not be possible.

Liula [17]3 years ago

4 0

Plants are the main source of organic matter in soil. Animals and microorganisms also contribute. Microorganisms, including fungi, bacteria, and single celled protozoans, play an active role in decomposing dead plants and animals. Because organic material releases nutrients when it decays, it contributes to soil fertility. Some bacteria also aid soil fertility in the nitrogen cycle. The bulk of organic matter originates from plants.

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Matings between individuals from the two populations of Rhagoletis produce hybrid flies that appear to be healthy and have norma

Mama L [17]

<h2>The correct answer is : C.</h2>

Explanation:

According to the question, mating between two populations of Rhagoletis produce hybrid flies.
This means that the two population is present in the same habitat or locality, hence they are capable of coming in contact with each other and mate. Hence, the answer cannot be Habitat Isolation.
Mating produces hybrid flies. This is possible when the gametes (egg and sperm) of the two different populations are capable of capable of coming close to each other and undergoing fusion (fertilization). Hence, there is no Mechanical Isolation.
The zygote formed by the above fertilization is capable of developing into healthy hybrid flies with normal life span. Hence, Pre-zygotic Isolation is absent.
But the hybrid flies formed are sterile and not fertile, that is, they are incapable of producing viable gametes which can undergo fertilization and produce a new offspring.Therefore, the eggs laid by the hybrid flies hatch less often. Hence, there is existence of Reduced hybrid fertility.

8 0

3 years ago

Which of the following is FALSE? Muscle cells contain myosin II, which is responsible for contraction. Myosin I is the only fami

natima [27]

Answer: Muscles cell contain myosin II, which is responsible for muscle contractions.

Explanation:

Myosin are motor proteins that are responsible for muscle contractions and motility processes in animals.

Myosin II is also called conventional myosin is a form of myosin found in muscles cells and are responsible for muscles contraction in animal cells. It is found in non muscles cells called stress fibers.

3 0

3 years ago

A moving object is an example of?

Alex73 [517]

Answer:

kinetic energy

Explanation:

think of kinetic energy as basically being the energy of movement. If something is moving it has kinetic movement.

6 0

3 years ago

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Goats and sheep belong to the same family but different genera. While they often live together in the same pastures, the hybrid

Maru [420]

Answer:

d. The two species have a different number of chromosomes, resulting in a postzygotic barrier.

Explanation:

The two species i.e. sheep and goat have different number of chromosomes that resulting in a postzygotic barrier. Sheep has 56 number of chromosomes whereas goat has 60 number of chromosomes that causes postzygotic barrier in the offspring produced from the fusion of these two species. Postzygotic barrier leads to the creation of a hybrid that is sterile and unable to produce offspring because of difference in chromosome number.

4 0

2 years ago

Further control of cell cycle is affected by. ________?

madam [21]

Answer:

Positive Regulation of the Cell Cycle

Two groups of proteins, called cyclins and cyclin-dependent kinases are responsible for the progress of the cell through the various checkpoints.

Hope this helps you

8 0

3 years ago