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otez555 [7]
3 years ago
6

The phanerozoic eon is divided into three eras. What are they

Biology
1 answer:
Aleonysh [2.5K]3 years ago
3 0
1- Paleozoic era
2- mesozoic era
3- Cenozoic era
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What are all the possible sources of genetic variation in sexuaally repdoucing organisms?
Allushta [10]

Answer:

Mutation, Gene flow/Migration/Immigration of gene and Recombination

Explanation:

For any species there are majorly three sources of genetic variations –  

a) Mutation – This leads to change in the genetic code with in the DNA of an organism. Sometimes mutation does not produce any effect on the organism. Mutation can produce both positive and negative impact. Its effect is observed in long run as its rate is slow.

b) Recombination – When an organism undergoes sex, his/her genes recombine with the genes of mating partner. The rate of recombination is faster than the rate of mutation  

c) Gene flow /Migration/Immigration of gene – In this gene travel from one set of population to the other. The frequency of gene in the mixed population lies between the original population gene frequency and the migrated or donor population gene frequency

7 0
3 years ago
Electrons move about the nucleus of an atom in regions called
Musya8 [376]

Answer:

atomic orbitals or subshells it the same name

7 0
3 years ago
PLEASE OH GOD HELP ME PLS I LOVE U.
Nostrana [21]
Remember that a controlled variable is a variable that stays the same thoughout the experiment.

it wouldn't be a. because two different wires were used

the final length of the wax would be your dependent variable, so it wouldn't be c.

the thermal conductivity is the independent variable so it isn't d.

the original length of the wax was the same for both.

So B is your answer.
7 0
3 years ago
Read 2 more answers
Suppose you travel to a tropical place like the Bahamas and watch the coastal poikilotherms, such as fish, crabs, and starfish,
PilotLPTM [1.2K]

Answer:

The correct answer is -

exposure of the opposite environments to the species and see if they are able to be active in cold waters.

If they are then species of organism in Maine and could have more ice-nucleating agents which are responsible for their high ability for activity in cold waters.

Explanation:

To test the assess if the Maine species of organisms are especially able to be active in cold waters an experiment can be designed where one needs to place the species or animals from Maine and Bahamas in reverse conditions.

Maine animals are placed in warm water environments and species from the Bahamas can be placed in cold water. Finding if they are able to adapt in reverse condition by calculating various processes and motion, if yes then  it shows that it is not a special ability to survive in cold temps. However, if it is not then the Maine poikilotherms are specially designed for their environment. In case of yes then species of organism in Maine and could have more ice-nucleating agents

6 0
3 years ago
Scientists use homologous structures to identify evolutionary relationships. Which is an example of homologous structures?
kirill115 [55]

Answer:

C

Explanation:

Homologous structures compare the same anatomical features in different species. C is correct because it compares the same trait (wings) in different species (dragonfly vs. bat)

8 0
3 years ago
Read 2 more answers
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