why do ice cores taken from polar regions contain much older information about earth's climate than ice cores taken from mountaintops

Answer:

Ice cores provide a unique contribution to our view of past climate because the bubbles within the ice capture the gas concentration of our well-mixed atmosphere while the ice itself records other properties. Basically, the lack of melt from polar regions don’t corrupt the record of trapped gases or blur the record of other impurities.

Explanation:

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which structure is the human body function most like the cell wall in plant cell?

A. Bones
B. Intestines
C. Veins

Most scientists think that Earth goes through natural cycles of warming and cooling. How is the current trend in temperature change different from the natural cycles in the past?
A.
The rise in average temperature is happening faster than before.
B.
The variation in average temperature is happening more slowly than before.
C.
The average temperature has remained constant for hundreds of years.
D.
The average temperature varies up or down from year to year.

When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the Earth. As magma cools, solid rock forms. This rock contains substances from the interior of the Earth. Which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?

A fresh water
В. solar energy
C. metal ores
D. fossil fuels​

I need help with this

One species of owl feeds only
during the day and another
species feeds only at night.
What type of reproductive
isolation is occurring between the
two owl species?
A. photosynthetic isolation
B. gametic isolation
C. temporal isolation

. If all of the snakes were eaten by the eagle, the eagle would receive How much kcal

define chromosome state its use​

A horticulturalist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele R(RR and Rr) and the trait of white flowers is governed by the allele r(rr).

The horticulturalist plans to cross a geranium that is true-breeding for red flowers with a geranium that is true-breeding for white flowers.

Which Punnett square best describes this cross?


R r
R RR Rr
r Rr rr


r r
R Rr Rr
r rr rr


r r
R Rr Rr
R Rr Rr





























Birth and Death rate table. In year 0, birth rate is 0.25 and death rate is 0.5. In year 1, birth rate is 0.3 and death rate is 0.4. In year 2, birth rate is 0.4 and death rate is 0.2. In year 3, birth rate is 0.5 and death rate is 0.15. In year 4, birth rate is 0.5 and death rate is 0.2. In year 5, birth rate is 0.4 and death rate is 0.3.

a graph showing birth and death rates per thousand people from pre-industrial to post-industrial times

Illustration of food web including a relationship between green plants, a mouse, a rabbit, a goat, an owl, a snake, a wild cat, a jackal, a kite, and a lion.

Four graphs A, B, C and D. Each graph is a line that occupies a square. The left and right sides of the graph touch the x axis. Each graph has a different shape, but the space under the line remains the same. Graph A. Solid line symmetrical bell-shaped curve. Graph B. Dotted line symmetrical bell-shaped curve superimposed on a solid asymmetrical curve that leans to the right of the dotted curve. Graph C. Dotted line symmetrical bell-shaped curve superimposed on a solid curve. The solid curve is symmetrical. It goes up on both ends to form two humps and it is lower in the middle. The solid curve looks like the letter M. Graph D. Dotted line symmetrical bell-shaped curve superimposed on a symmetrical curve that is narrower and taller than the dotted line curve.

A phylogenetic tree showing the evolutionary relationships between, from left to right, proteobacteria, chlamydia, spirochetes, gram-positive bacteria, cyanobacteria, euryarchaeota, crenarchaeota, diplomonadida, parabasala, euglenozoa, alveolata, stramenopila, rhodophyta, chlorophyta, plantae, mycetozoa, fungi, and animalia

Tree diagram with five levels, showing genetics of Darwin finches. Starting from bottom, level one shows Common ancestor from South American mainland. Level two shows Ground, Tree, and Warbler finches with their Genuses as Geospiza, Camarhynchus, and Certhidea respectively. Level three shows Seed eaters, Sharp-beaked ground finch or G difficilis, Cactus flower eaters, Bud eater, and Insect eaters. Level four shows Large ground finch or G magnirostris, Small ground finch or G fuliginosa, Cactus ground finch or G scandens, Small tree finch or C parvulus, Medium tree finch or C pauper, and Woodpecker finch or C pallidus. Level five shows Medium ground finch or G fortis, Large cactus ground finch or G conirostris, Vegetarian finch or C crassirostris, Large tree finch or C psittacula, Mangrove finch or C heliobates, Green warbler finch or Certhidea olivacea, and Gray warbler finch or Certhidea fusca.

A diagram of the cycle of photosynthesis and cellular respiration, with the steps labeled A, B, C, and D.

Stage of mitosis showing split chromosomes and the sister chromatids on the opposite poles of the cell

Assessment navigation

In the above diagram of an animal cell, what is the function of organelle 3?

In nature, which pigment gives red algae it’s color?

How does limited stomach volume affect weight loss?

A hygrometer _____.


measures the mold spores in fresh food
measures the mold spores in fresh food

measures humidity, temperature, and dew point simultaneously
measures humidity, temperature, and dew point simultaneously

measures the bacteria count in fresh food
measures the bacteria count in fresh food

identifies food that has been subjected to irradiation
identifies food that has been subjected to irradiation

which of the following describes a hypertonmic solution

The function of the platelets is to:
A. Transport oxygen to the tissues.
B. Surround and consume harmful microbes.
C. Help repair tissue and close wounds both internally and externally.
D. Produce chemicals called antibodies.

As ocean water salt concentration increases, the _____.

What does Kipp need to do to
complete all four steps?
A. He needs to really think hard about what
he likes, what he enjoys and what careers fit
those skills.
B. Kipp needs to research the education
requirements for electricians and where
courses are offered..
C. Kipp needs to do some internet research
about whether electricians will be in
demand.

There are large differences between organisms of different species. The basic reason for this is due to
A. Different genetic information.
B. Different ages of the organisms.
C. The species live in different areas of the world.
D. Different functions.

The absorptive state is regulated mainly by insulin, whereas the postabsorptive state is regulated by multiple hormones.
a) true
b) false

what does menaing of reporoducion​

What is a biome? Describe 2 biomes on the planet.

What energy-rich substance is produced by green plants
during photosynthesis?

A drug that constricts blood vessels would have which of the following direct affects

13. What is the maximum total number of ATP molecules formed during anaerobic cellular respiration

How are vascular and nonvascular plants different in their structure?

Based on the pressure data shown in the weather map, in which area are you
most likely to see calm, clear weather?
1
B
1006
1040
1016
H
D 1020
10
2004
10:2
1000
A. A
B. B
C. C
D. D

Which of the following statements best describes the relationship between genes and their outcomes?

Every gene influences a single trait.

The outcome of a gene is affected by the environment of the cells and the timing of gene expression.

Similar genes produce the same outcome in every individual.

Every gene can be linked to one specific, predictable outcome.

Which statement can best be supported by the picture of embryos

The chart below shows several species found in a pond ecosystem and the pH levels in which the species can survive. The normal pH
of the pond is 6.5.
If the pH of the pond fell to 5.5 due to acid rain, which of the species shown in the chart would die?
pH 6.5 pH 6.0 | pH 5.5 pH 5.0 | pH 4.5l pH 4.0
Trout
Bass
Perch
Frogs
Salamanders
Clams
Crayfish
Snails
Mayflies

How would the role of gene expression in cells be best described?

Living systems are made of complex molecules including carbohydrates, fats, proteins, and nucleic acids. Even though there are more than 100 elements known to exist, these molecules are comprised of only a few elements. What are these elements?