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olya-2409 [2.1K]
2 years ago
7

Where did the carbon in all living things on earth come from?

Biology
1 answer:
soldier1979 [14.2K]2 years ago
8 0

Answer:

So where then did all the carbon that living organisms are built of come from? It turns out that most of the carbon we use today came from a collision with another smallish planet about 4.4 billion years ago.

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Which statement best explains the importance of animals to humans?
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Animals are used for food, products, and services.
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4 years ago
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18. Which of the following is not an advantage of using biological control?
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Answer:

Explanation:

It upsets the natural food webs in the area

i think B is the answer..

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3 years ago
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You observe a high proportion of malarial infections in a small village located in Angola. Malaria is caused by the protozoan Pl
svet-max [94.6K]

Answer:

<em>B and C.</em>

Explanation:

The epidemiological triangle is an illustration of interaction among suitable hosts, disease agents, and the environment that drives successful outbreak of diseases.

In order to successfully tackle or reduce the incidence of a disease, the triangle has to be broken.

<em>In the case of malaria which is caused by plasmodium but spread through the female anopheles mosquito, one way of breaking the epidemiological triangle is to eliminate female anopheles mosquito in the environment using any possible means. This will stop the spread of the parasite and hence, the disease.</em>

<em>Another way to reduce/prevent malaria is to prevent the vector, female anopheles mosquito from getting to the host, the human populace. This can also be achieved by several possible means.</em>

Relocating the entire village to a neighbouring village might not break the epidemiological triangle as long as female anopheles mosquito still abounds. In the same vein, antibacterial drugs will not help to treat malaria. However, instructing residents on personal protective measures and controlling the vector through chemical larvicides will go a long way in breaking the triangle and reducing the incidence on the malaria disease.

<em>The correct options is B and C.</em>

5 0
3 years ago
Common characteristics supporting the idea that the first land plants were related to green algae include __________.
Vlad1618 [11]

Answer:

Presence of chlorophyll  pigment in the leaves and cell walls were made of cellulose

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The first plants that appeared on the land areas were comprised of the main component known as the cellulose that forms the cell wall of the plants and is responsible for making the various parts of plants such as branches, plant stems, and leaves, stronger and supportive.

In addition to this, the leaves of these primitive plants were comprised of green pigments known as chlorophyll that absorbs the sunlight and CO₂, and helps the plants in preparing the food for themselves as well as for the consumers, and also liberates oxygen (O₂) with it.

Thus, these are the two common characteristics that supported the idea that the primitive land plants had a relation with the green algae.

7 0
4 years ago
Which situation indicates that a disruption of homeostasis has taken place? cell division that is involved in a normal growth th
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A rapid rise in the number of red blood cells.
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