Answer:
New species can appear gradually through small changes in an ancestral species.
Explanation:
The new species that appear are due to hereditary variations that occur in a population. The adaptive variations are said to confer a selective advantage to organisms possessing them. The result of variations is that well adapted individuals are able to survive and reach the reproductive age and pass over their favourable characteristics to their offspring.
Answer:
convection in the asthenosphere
Answer:
many breast cancers have no obvious symptoms at all. When there are no symptoms, breast cancer can be found through a screening mammogram. The most important thing is to bring any unusual signs to your doctor's attention, and to talk to your doctor about a breast screening plan that is appropriate for you
Explanation:
The answer is D
Explanation: In humans, recessive sex-linked traits generally occur on the X chromosome. Since males are (XY), they will inherit only one sex-linked allele on their X chromosome.
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From the options The Benefits of a large sample size are ;
- It enables us to place greater confidence in the outcome
- It eliminates the probability of random variation.
Larger samples are most efficient in studying a large population because every element is most likely represented in a larger sample unlike a smaller sample.
Some of the advantages of larger samples includes ; the reduction in the margin of error, provision of an accurate mean value, and also in large samples outliers that might skew the desired result are easily identified.
hence we can conclude that the benefits of a large sample size are :
It enables us to place greater confidence in the outcome
It eliminates the probability of random variation.
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