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3 years ago

O survive and advance, humans have used the natural resources in their environment for at least as long as recorded history.

2 answers:

7 0

The answer is C) coal. This is because coal is a natural resource and is made over millions of years; coal is being burned faster than it can be made.

Stolb23 [73]3 years ago

6 0

Answer:

C. Coal

Explanation:

Coal is a fossil fuel that develops from remains of ancient organisms. Death of plants and their subsequent burying in ground initiates the process of coal formation. Anaerobic conditions do not allow the bacteria and fungi to decompose the wood completely. The buildup of heat and pressure on partially decomposed wood converts them into coal over a long period of time. Since coal formation is a slow natural process, it is a non-renewable energy source with limited supply.

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The first stage involves creating a filtrate in the ____________ . Second, the filtrate flows through the tubules and useful sub

Fed [463]

Answer:

These are the basic steps of urine formation.

Explanation:

The first step comprises creating a filtrate in the glomerulus.

During the second stage, the filtrate flows through the tubules, and useful substances are reabsorbed.

Waste products will then be secreted by the tubules.

Whereas, the final stage is the conservation of water that occurs in the renal tubule.

There are four major stages in the formation of urine.

3 0

3 years ago

In hamsters, we can examine the genes for coat color and eye color which are linked:B = brown coat, b = white coat, G = green ey

Inessa [10]

Answer:

10.2 cM

Explanation:

Given,

pure breeding parent 1 : BBgg = brown coat and pink eyes

pure breeding parent 2 : bbGG = white coat and green eyes

BBGG X bbgg = F1 = BbGg ( All are brown with green eyes )

When F1 progeny is test crossed with white coat and pink eyes hamster:

BbGg X BbGg = F2 =

brown, pink eyes = 99 = parental

white, green eyes = 103 = parental

brown, green eyes = 12 = recombinant

white, pink eyes = 11 = recombinant

Recombination frequency =

(total number of recombinants / total progeny ) * 100

= [( 11 + 12 ) / ( 99 + 103 + 12 + 11 )] * 100 = (23/225)*100 = 0.102 * 100 = 10.2 %

1 % recombination frequency = 1 cM distance between genes

Hence, the distance between B and G gene is 10.2 cM

4 0

4 years ago

You perform an experiment in which chromatin is isolated from sea urchin sperm cells and briefly digested with micrococcal nucle

irga5000 [103]

Answer:

a) DNA fragments associated with histone proteins are all multiple in length (i.e., 260 bp, 520 bp, 780 bp, etc), thereby suggesting the presence of a pattern of organization in the chromatin

b) it suggests that each unit of organization (ie, each nucleosome) consists of 260 bp associated with chromatin proteins

Explanation:

The nucleosome is considered as the basic unit of chromatin. A nucleosome consists of approximately two turns of DNA wrapped around a core of eight histone proteins (i.e., a histone octamer). The histone octamer consists of two copies of each of the histones H2A, H2B, H3, and H4. Moreover, the nucleosomes are connected together by linker DNA sequences which vary between 10 and 100 bp in length.

8 0

3 years ago

Rachel Carson wrote about the delicate balance of organisms in a food web. Snakeheads, a freshwater fish that is not normally fo

kirill [66]

The snakehead could unreservedly eat little fish and scavangers, so that would evacuate/diminish the predator for zooplankton and phytoplankton. So zooplankton and phytoplankton populace would increment while little fish and scavanger populace would diminish. Presently if little fish and shellfish populace diminishes, their predators would have bring down sustenance, so vast fish pop. would diminish. On the off chance that vast fish pop. diminishes, their predators will have less nourishment thus the number of inhabitants in well evolved creatures will somewhat drop, however not by much, since they can feast upon zooplankton.
So at last, just the phytoplankton populace would increment while everything else diminishes.

4 0

3 years ago

Is plantain a tuber crop

Sloan [31]

Answer:

yes

Explanation:

Another fact is that the Banana plant is one of those perennial plants whose parts can be used as food, starting from its fruits-the bananas to its roots tubers. Banana tubers have been used as food mostly in states like Uganda, Indonesia, and also India.

6 0

2 years ago

Read 2 more answers