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grin007 [14]
2 years ago
15

Natural selection changes allele frequencies because some __________ survive and reproduce better than others.

Biology
1 answer:
Ratling [72]2 years ago
5 0

Answer:

individuals

Explanation:

.

You might be interested in
How do secondary consumer obtain their energy? <br><br>Please someone help me ​
Orlov [11]

Answer:

Consumers must obtain their nutrients and energy by eating other organisms. Decomposers break down animal remains and wastes to get energy.

secondary consumer obtain their energy by eating or consuming primary consumers.

7 0
3 years ago
13. A biochemist isolated and purified molecules needed for replication. When DNA was added, replication occurred but the DNA mo
zalisa [80]

Answer:

DNA ligase

Explanation:

DNA replication is a process whereby a particular DNA makes a copy of or synthesizes itself. It consists of several steps with some important enzymes for successful, error free replication. The various steps are as follows;

  • Unwinding of the double helix structure of the DNA and formation of replication fork. The enzyme involved here is the DNA helicase.
  • Primer, a short piece of RNA becomes synthesized and binds to the 3' end of one of the 2 strands of the DNA, the leading strand. The enzyme involved is the DNA primase.
  • Replication of the <em>leading strand</em> then proceeds with the elongation of the primer through the addition of bases in the 5' to 3' direction leading to the formation of continuous strands.
  • The other strand of the DNA, known as the <em>lagging strand </em>starts its own replication by binding with multiple primers at different regions of the strand. Bases are then added to each primer leading to the formation of several, short discontinuous DNA strands known as Okazaki fragments. The enzyme involved in the elongation process is the DNA polymerase.
  • Next is the termination of the replication process after the formation of the continuous and discontinuous strands. Exonuclease enzyme removes primers from the synthesized strands. Primers are replaced by appropriate DNA bases and the Okazaki fragments are joined to form a unified DNA strand by an enzyme known as the DNA ligase.

The many, few nucleotides long DNA segments observed by the Biochemist are the Okazaki fragments that should have been joined together by the DNA ligase.

Hence, DNA ligase must have been the component left of the mixture.

7 0
4 years ago
What challenges would you expect scientists to face when growing plants in space? What challenges will the astronauts have with
DanielleElmas [232]

Answer:

the challenges they would expect to see is the plants not having water or air

planted need water to have photosynthesis and since theres no water in space and little to no atmosphere the plants would suffocate

4 0
3 years ago
Describe the processes that turn metamorphic rock into igneous rock and the energy that powers the processes.
TiliK225 [7]

So, we know that a metamorphic rock is either an igneous or a sedimentary rock that are exposed to intense heat and pressure.

But when the metamorphic rock is thrusted deep underground through subduction, it will again be subjected to intense heat. This can cause it to melt, turning it into a magma. When the magma cools down, it again becomes an igneous rock and the rock cycle continues.

8 0
3 years ago
9. Because the sun heats sections of the Earth more or less, and hot
Nadya [2.5K]

Answer:

This shows the interaction between the earth and sun.

Explanation:

  • There is a variation in the amount of heat that reaches the different latitudes as the interaction between the sun and earth which firms different angles of incidence on the surface.  
  • The rays of the sun are more concentrated in mid latitudes that is the tropics and are slanting towards the poles this due the tilt in axis of earth.  
  • This variation lads the warm air to rise and reach the poles and similar the cold polar air reaches the tropics and develops a cycle of convective cells.  This leads to a latitudinal balance in temperatures.
3 0
3 years ago
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