Answer:
The correct option is <u><em>A. they evolved from land mammals.</em></u>
Explanation:
The process of evolution explains how closely one organism is to another based on their common ancestors. Scientists believe that those organisms which show many similarities in their structures or functions might have evolved from a common ancestor in the past.
As in the above-mentioned question, scientists have observed that cetaceans lack gills and breath air, this is a property of land mammals. The cetaceans have fin bones which are similar to the limb bones. As limb bones are present in land mammals, hence they cetaceans and land mammals might have common ancestors in the past.
<u>Answer:</u>
Dr. Garcia’s emphasis best illustrates Biopsychosocial approach.
<u>Explanation:</u>
- It is an interdisciplinary model that looks at the interconnection between biology, psychology, and socio-environmental factors and their effects on individuals.
- It was developed by George L. Engel in 1977 and it was first of its kind that employed such diverse thinking.
- This model displays the development of illness through the complex interaction of biological, psychological, and social factors.
- This approach reopened new pathways for the idea of mind-body dualism which forgotten during the biomedical approach.
Answer:
Short answer is primers are partially complementary.
Explanation:
Forward primer: 5'-AGTCTACTCGTAACCGGTTACC-3'
Reverse primer: 5'-TAAGGCATCATGGTAACCGGTT-3'
When we write reverse primer 5' to 3' we can easily see that
3'-TTGGCCAATGG---5' is complementary to the forward primers'
5'---AACCGGTTACC-3' sequence. So instead of binding to the template DNA these primers might bind each other resulting with reduction of efficiency of DNA amplification.
