Discuss the relationship between sexual selection and human reproductive behaviour. (8+16 Marks) Sexual selection is the process in which a species changes over time as a result of the passing on of the genes that make one individual more attractive than another. This could be anything from a long tails to bright colours. Charles Darwin believed that human reproductive behaviours have their origins in the past and exist because they ensured survival or reproductive advantages to us. There are two types of sexual selection.
Why? Yes, humans are subject to the same pressures of natural selection as other organisms we evolve just like other organisms. We are subject to the pressures of evolution. (www.Livescience.com) 3. Provide an example of convergent and divergent evolution, adaptive radiation, and co-evolution.
In order to withstand cold temperatures, the diamondback rattle snake hibernates during the winter months in underground boroughs previously made by other animals as it does not have the ability to dig on its own (Glaudas, 2009). To protect it self from hot weather, the diamondback becomes nocturnal in the summer months and consumes its meals at night when the temperature becomes cooler. Therefore, it is most active during the spring and fall months when the weather is most ideal. The diamondback rattlesnake has the ability to slow its metabolic rate to reduce the amount of food, water and oxygen it needs to survive (Glaudas, 2009). The diamondback rattlesnake’s skin is also another example of how this organism has adapted to living in the Southwestern desert.
It is a key mechanism of evolution. The term "natural selection" was popularized by Charles Darwin who intended it to be compared with artificial selection, what we now call selective breeding. Basically its means when an individual of a species has a good trait such as long legs and breeds
Name:_________________________________________________________________ Period:______ Natural Selection Bunny Simulation http://phet.colorado.edu/en/simulation/natural‐selection Adapted from the HHS Biology Team Feb, 2012. Background Information: In the mid 1800’s a scientist named Charles Darwin discovered and developed a mechanism for evolution that he called natural selection. Natural selection simply stated that within any population with variation there would be a struggle for existence that would ultimately lead to the survival of the fittest. Darwin then went on to say that those traits that were the most fit would be passed on to the next generation more frequently. This continual selection for certain traits and against others over
Behaving Brain 1. Explain the major concepts of evolutionary theory, such as natural selection and variation. Charles Darwin created the theory of evolution and helped us to understand the roots of behavior and mental process. Natural selection states: variations increasing that odds of reproducing and surviving are most likely to be passed on to future generations, this has shaped our traits and behavior tendencies. Nature has selected advantageous variations from the mutations and new gene combo's produced at each human understanding.
First proposed by Darwin and Wallace in 1858, Natural selection is recognised as a primary mechanism of evolution. The principal of natural selection asserts that the range of inheritable variation of traits in a population, those that contribute to an organism’s survival are those most likely to be passed on to the next generation. Hence, the contribution to succeeding generations are not random but are selected by the natural process of the viability of traits. According to Barrett et al (2002), natural selection has three premises:
Evaluate Bowlby’s evolutionary theory of attachment Attachment is an emotional connection or bond which involves being dependent on another person. When applied to the ‘Attachment Theory’ it is an emotional connection between the child and the primary caregiver which is dependent on mutual affection. Bowlby’s theory of attachment was evolutionary. The theory of evolution was developed by Charles Darwin, the theory states that all species evolve through time through natural selection. As species reproduce and the generations go by the traits which helped the animal survive are passed on.
According to the life history approach our entire lifecycle represents a series of trade-offs between allocating energy towards different life history traits using this idea of limited energy and trade-offs. Life history theory tries to answer the questions about the unique aspects of human development and lifecycle compared to other primates. Their life stages and their durations are compared to other species to identify where we are different and tries to explain why. Life history theory explains how natural selection and evolution work together for organisms to survive and reproduce in our ever changing environment. Life history theory looks at human lifespan stages through birth, infancy, childhood, reaching puberty, through reproduction stage, menopause, grandma stage and death.
Due to those changes, primates have had to undergo changes to adapt to their new living conditions. One of the many changes that primates have gone through would be primate locomotion and body configuration. .This research paper will explain as to why the evolutionary modifications of the primate have helped them survive. Primates, as a whole, have evolved over the time span of several million years with the most advanced primate being the human. The planet Earth has gone through several weather, climate, and geographical changes.