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slega [8]
3 years ago
9

Which activity is an example of a chemical change?

Biology
1 answer:
Pavlova-9 [17]3 years ago
4 0

Answer:

An old penny rusting

Explanation:

A penny forming rust is the penny being chemically altered and changing form as opposed to dissolving sugar in water, which is still sugar, just mixed with water. It doesn't change the chemical makeup of the water or sugar.

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Which of the following statements about the ‘Hobbits’ of Flores is FALSE?
sammy [17]

Answer:

d. CT scans of the fossilized skulls of Hobbits suggest they were probably microcephalic modern Homo sapiens.

Explanation:

The work of Falk et al in 2007 compared the CT of microcephalic humans skulls and normal humans skulls, finding the variables that allow them to classified with 100% success. When compared with the skulls of the ‘Hobbits’ of Flores, the size is similar to the microcephalic skulls in humans but the shape features sort it with normal humans skulls. They concluded that the ‘Hobbits’ of Flores are a separate species.

4 0
3 years ago
Why does having a genetically diverse population make a species more likely to survive a change to the enviroment?
gulaghasi [49]

Answer:

having a genetically diverse population make a species more likely to survive a change to the enviroment because random mutations can occur in a species and if a sudden change in the environment were to occur like extreme heat for example, some of the mutations in their DNA may help them survive this extreme heat and the species will be more likely to survive

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3 years ago
Beginning in the mid 1600’s Earth entered into a mini-ice age
crimeas [40]
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A major volcanic eruption.
8 0
3 years ago
The best indicator of the efficiency of exercise is
butalik [34]
I think the answer is D. A good indicator is the resting heart rate. Exercise strengthen your heart and it makes it more efficient. The resting heart rate shows of the heart is pumping blood normally each time it contracts. Having a normal resting heart rate would mean a healthy heart.
6 0
3 years ago
How do the lipids of the cell membrane and the lipids found in butter and vegetable oil differ?
Liula [17]

Answer:

The lipids of the cell membrane and the lipids found in butter and vegetable oil differ in the number of fatty acids attached to the glycerol molecule.

5 0
3 years ago
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