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Savatey [412]
3 years ago
12

Scientists at Russia’s Vostok Station in eastern Antarctica drilled the longest ice core ever recorded. They compiled this graph

using the data collected from the ice core. This plot shows the temperature, carbon dioxide (CO2), and dust levels up to 400,000 years ago. Which statement best summarizes the data in the graph?

Biology
2 answers:
Wittaler [7]3 years ago
4 0
The data supports the fourth choice, that increasing air temperature and CO2 levels correlate with a decrease in dust concentration.

The first choice is unlikely to reflect dust concentration, and is more likely to be for air temperature. The second choice is false, because the dust concentration is more of a decreasing trend. The third choice is not true, as the spikes in air temperature and atmospheric CO2 concentrations seem to occur simultaneously, implying a positive correlation.
ddd [48]3 years ago
4 0

Answer:

The answer is D.

Explanation:

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4 0
3 years ago
You have identified a mutation in a gene that seems to decrease transcription of another gene 2000 bp away from the mutation sit
Reil [10]

Answer:

Enhancer sequence.

Explanation:

Enhancers may be defined as the transcription factors that are used to enhance or increase the activity of the gene. Enhancers bind with the transcription factors to regulate and increase its expression.

The mutation in the enhancers decrease the transcription of  of the other gene. These sequences lies far away from the transcription site but still known to increase the rate of transcription. Hence, the mutation has been done in the enhancer sequences.

Thus, the correct answer is option (b).

7 0
3 years ago
List three ways that reproductive isolation occurs
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Hello

When populations have differences in rituals or behaviors. When populations are separated by rivers, mountains, r bodies of water.

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6 0
3 years ago
What happens to the concentration of oestrogen at ovulation?
frez [133]

Answer:

When oestrogen rises to a high enough level it causes a surge in LH from the pituitary which causes ovulation where an egg is released from the follicle (Day 14 of the cycle). The follicle becomes the corpus luteum and this produces oestrogen and progesterone which inhibit FSH and LH production by the pituitary.

Explanation:

5 0
3 years ago
Approximately how many species of Arthropods have been discovered on Earth?
trasher [3.6K]

Answer:

Over 800,000

<em>Arthropods are found in all parts of the world in a wide variety of environments, from the deep sea to the frozen arctic regions. Over 800,000 species of arthropods have been identified, but scientists estimate that there may be tens of millions of species in this phylum, many of them yet to be discovered!</em>

Explanation:

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8 0
2 years ago
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