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Studentka2010 [4]
3 years ago
7

Which of the following best describes the total amount of carbon in the system made up of the Earth and its atmosphere?

Biology
1 answer:
monitta3 years ago
6 0

Answer:

A

Explanation:

It remains constant because carbon cycles through the atmosphere, hydrosphere, biosphere, and geosphere.

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The stages of meiosis are classified into two phases. explain why there is in need of two phases
choli [55]
The two phases meiosis is divided into is Meiosis I and Meiosis II. Because Meiosis is not asexual reproduction is uses sexual reproduction by combining the chromosomes of the mother and father. Since each parent give 23 chromosomes to make the whole 46 a human needs, when the chromosomes come together they create tetrads. these are pairs of replicated chromosomes. There are 2 phases because the first phase separates the tetrads leaving the two sister chromatids. During Meiosis II, the sister chromatids are separated like in Mitosis. Overall, the reason that there are two phases is because the maternal and paternal gametes give replicated chromosomes to the zygote.
4 0
4 years ago
Recycling one ton of paper is the equivalent of approximately how much of the following? a.) all of the below b.) 460 gallons of
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5 0
4 years ago
Read 2 more answers
The stems of bamboo, a tropical grass, can grow at the phenomenal rate of 0.3 m/day under optimal conditions. Given that the ste
nevsk [136]

Answer:

Approximately 6944 glucose residues are added enzymatically per second

Explanation:

Cellulose is the main structural polysaccharides in plants. It is composed of unbranched glucose monomer units linked to each other by beta 1-4 glycosidic bonds.

The cell wall and stem of plants cells are composed of cellulose fibers. They provide rigidity and support to the plant.

In the given bamboo plant, the enzymatic addition of glucose units to the growing cellulose fiber chains results in the phenomenal growth rate of the bamboo stem.

Since each glucose unit contributes ~0.5 nm to the length of a cellulose molecule, number of glucose units required for daily growth is calculated as follows:

0.5 nm = 10⁻⁹

0.3 m/0.5 x 10⁻⁹ m = 600000000 units of glucose per day

Number of seconds in a day = 24 * 60 * 60 = 86400 seconds

Number of glucose residues added per second = 600000000/86400

Number of glucose residues added per second = 6944.4 glucose molecules per second

Therefore, approximately 6944 glucose residues are added per second

8 0
3 years ago
This female patient with terminal carcinoma of the breast, metastatic to the liver, brain, and intrahepatic and extrahepatic bil
Vilka [71]
The codes that will be assigned to the patient with the stated conditions, undergoing the hydration via IV's and not being treated for the carcinomas are:

E86.0 - dehydration
G89.3 - neoplasm related pain
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C79.31 - secondary malignant neoplasm of kidneys
C78.7 - secondary malignant neoplasm of liver
6 0
3 years ago
Please help!
pogonyaev
It is believed that the tilapia fish was introduced into the mangrove system by escaping from fisheries and aquariums by accident, but this species is also used to control the population of mosquitos to prevent outbreaks of malaria and other invasive species on which they feed.
The tilapia are highly tolerant and easily adaptable to different conditions in the mangrove ecosystem and they are highly efficient predators. This often makes them more successful in the environments where they are introduced than the indigenous species, which results in disruption of the food chain.
The negative human impact on mangroves disrupts the balance in the mangrove ecosystems, weakening the populations of different species that originate from mangrove forests. This leaves more space and resources to be exploited by the tilapia. 
The strategies to control tilapia in mangrove ecosystems focus on restoring the habitat and strengthening the populations of indigenous species while decreasing the numbers of tilapia.
The species can be eradicated by selective overfishing of the species or by introducing another species into the habitat which is a natural enemy of the tilapia. 
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3 years ago
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