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Kitty [74]
2 years ago
9

The Earth remained a frozen snow ball until carbon dioxide levels in the atmosphere increased. Why did carbon dioxide from the v

olcanoes fill the atmosphere?
Biology
1 answer:
solong [7]2 years ago
4 0

Answer:

Because the land surface was then largely covered in ice, continental weathering effectively ceased. This locked the planet into a 'Snowball Earth' state until carbon dioxide released from ongoing volcanic activity warmed the atmosphere sufficiently to rapidly melt the ice cover. This model does not, however, explain one of the most puzzling features of this rapid deglaciation; namely the global formation of hundreds of metres thick deposits known as 'cap carbonates', in warm waters after Snowball Earth events.

The Southampton-led research, published in Nature Geoscience, now offers an explanation for these major changes in ocean chemistry.

Lead author of the study Dr Tom Gernon, Lecturer in Earth Science at the University of Southampton, said: "When volcanic material is deposited in the oceans it undergoes very rapid and profound chemical alteration that impacts the biogeochemistry of the oceans. We find that many geological and geochemical phenomena associated with Snowball Earth are consistent with extensive submarine volcanism along shallo

Explanation:

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Which of the following represents a possible chromosome number of a species that uses sexual reproduction, and why?
Ann [662]

Answer:

B. 62, because this number will create a haploid cell, allowing both female and male gametes to be combined.

Explanation:

Sexual reproduction involves two organisms to come together (male and female). Sexually-reproducing organisms make use of a process called MEIOSIS to produce gametes or sex cells, which have a reduced number of chromosomes as the parent cells producing them.

A sexually reproducing organism must contain a complete diploid chromosome number (2n) that allows it to produce cells with a haploid chromosome number via meiosis. The haploid gamete cells that result from each meiotic divisions of male and female parents can combine to form a whole diploid organism.

3 0
2 years ago
What does photosynthesis and cellular respiration have in common?
Zolol [24]
They both reproduce and have to do something with life
6 0
2 years ago
The purpose of an experiment is to compare results with a(n) _____.
morpeh [17]
The best answer among the choices given is option B. The purpose of an experiment is to compare results with a hypothesis. A hypothesis is defined as a theory or idea that has not yet been proved. In order to turn this into a fact, scientific method should be done and the data obtained is analyzed whether it speaks the truth of the hypothesis.
3 0
3 years ago
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A population of ground mice consist of 500 individuals. You are interested in the gene that codes for for a color and find out t
Lelechka [254]

Answer:

0,58

Explanation:

Mice are diploid (2n) organisms, which means that their cells contain two complete sets of homo-logous chromosomes (i.e., they have two copies of any given <em>locus</em>/gene). An allele can be defined as a variant of a gene, whereas diploid (2n) organisms have two alleles at each genetic <em>locus</em>, which are located on homo-logous chromosomes. In this case, we know that there are 580 dominant alleles in a population of 500 individuals, thereby the total number of alleles in this population is 1000 (2n >> 500 x 2 = 1000 alleles), and the frequency of the dominant allele is 0,58 (580/1000 = 0,58).

6 0
2 years ago
Why are cells called the building blocks of an organism?
mrs_skeptik [129]

Answer:

They are called the building blocks of an organism because  all living things are made up of billions of cells that can reproduce, build and change that's why it is called the building blocks of all living things.

Explanation:

7 0
3 years ago
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