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pav-90 [236]
3 years ago
6

Elephants are not the most common species in African grasslands. The grasslands contain scattered woody plants, but they are kep

t in check by the uprooting activities of the elephants. Take away the elephants, and the grasslands convert to forests or to shrublands. The newly growing forests support fewer species than the previous grasslands. Elephants can be defined as what type of species in this community?
Biology
1 answer:
Agata [3.3K]3 years ago
3 0

Answer:

The Elephant can be defined as a KEYSTONE SPECIE

Explanation:

A KEYSTONE SPECIE is an animal specie that maintains an ecosystem relative to their population. These species' activities, play a crucial role in maintaining the ecosystem. In this case, the elephant's activity of uprooting trees, helps in keeping the ecosystem in check, and support its current inhabitants.

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How do exogrya and pycnodonte differ from modern day oysters?
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Answer:

This oyster occurs very commonly in the oyster beds of the Navesink formation at Big Brook. from Exogyra by its non-spiral nature and lack of ornamentation. Size: Pycnodonte can be between 2 to 10 cm (about . ... Some older sources label the genera of this oyster as Gryphaea.

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2 years ago
Harry suffers from cystic fibrosis and frequently has periods where he can hardly breathe. the problem is most likely the result
nika2105 [10]
Hey there,
<span>Thick secretions that exceed the ability of the mucus elevator to transport them.

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7 0
2 years ago
How can one use a community in teaching the concept "Safe use of agro-chemicals" to grade six level?
RoseWind [281]

Answer:

A community can be divided into groups, where each group can present the correct ways to use agro-chemicals safely in different types of activity.

Explanation:

Using a community can be very helpful in teaching the safe use of agrochemicals. This is because, as a community usually has a large number of people, these people can be divided into small groups that will serve as small workshop rooms. Within these groups, the different ways to use agro-chemicals in a safe way, both for the applicator and for the environment, will be shown. Information on the composition of agrochemicals, first aid in case of accidents with the use of these products, among other things, can also be presented.

7 0
2 years ago
Suppose a geneticist mutates the gene for the poly(A) tail-binding protein (PABP) in an eukaryotic cell line. The resulting muta
djyliett [7]

Answer:

(B)

Explanation:

Translation will not occur in the cultured cells, because mRNA will be degraded at a greater rate than normal.

The reason of degradation is that scientist mutated the gene in eukaryotic cell which means translation will only occur in eukaryotic cell not in cultured cell.

5 0
3 years ago
Read 2 more answers
In a multi-paragraph essay, explain how the activity of individual neurons enables you to perform a simple action like answering
maria [59]
There are two systems in the human body that are responsible for the coordination between the functions of different systems to achieve the unity of the living organism's body. These two systems are the nervous system and the endocrine system. The action of the nervous system is fast and takes a short time, while the action of the endocrine system is slow and takes a long time.

The functional unit of the nervous system is the nerve cell or the neuron. The neuron consists of a cell body and the axon. The cell body starts with the dendrites that receive the messages or the impulses from other neurons or from different sense organs or receptors. These impulses are then transmitted through the cell body. The cell body contains a nucleus and different organelles which help the nerve cell to perform its functions. The nerve impulse is then transmitted to the axon.

The axon is an extension from the cell body. There are some cells called Schwan cells that secrete a myelin sheath to insulate the axon from the surrounding medium. The insulated axons have more ability to conduct the impulses than non-insulated axons. The axon ends with the terminal arborizations. The terminal arborizations of a nerve cell connect to the dendrites of the next cell or to the afferent organ. The gaps between the dendrites and the terminal arborizations are called the synapses.

The nerve impulse is an electrochemical phenomenon i.e. an electrical phenomenon with a chemical nature. The membrane of the axon acts as a barrier between an outside positively charged medium and an inside negatively charged medium. This makes a potential difference of  -70mV. This state is called the resting potential. When the membrane is subjected to a stimulus, the positive charges enter to inside and the negative charges exit to the outside. The potential difference now becomes +40mV. This state is called the depolarization state. The point of stimulation acts as a new stimulus for the next point and so on. The membrane sooner gains its permeability again and the positive charges return to the outside and the negative charges to inside. This state is called repolarization.

The nerve impulse reaches the synapse. There are some neurotransmitters that are excited by the nerve impulse coming and carry the message across the membrane. Some receptors receive theses neurotransmitters on the dendrites of the next neuron. These receptors act as a stimulus for the new cell.
3 0
3 years ago
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