Asexual reproduction

Biologists at the University of California, Riverside have made an incredible evolutionary discovery that links sexual selection and placentation (Science Daily, 2014). The study of 150 species of Poeciliidae (Figure 1), describes the morphologies of males in species with placentas. Sexual selection- “special case” of natural selection, which acts on an organism’s ability to obtain, or successfully copulate with a mate, is not exceedingly important in species with placentas (Science Daily, 2014)…

Photosynthesis and sexual reproduction are the two main turning points in the history of life, because the ability to process energy from sunlight, random variation and non-random selection allowed for evolutionary growth and the survival of life. Photosynthesis, an important process of energy transformation is crucial in the development of metabolic microorganisms, as well as the evolutionary changes from primitive to more complex life. Sexual reproduction displays a significant evolutionary…

Introduction Many people believe that a couples ability to achieve a pregnancy depends on the females ability to conceive. In reality, about one-third of all couples struggling with infertility can attributed to male factor infertility. Male factor infertility is the inability to achieve pregnancy due to low sperm production, abnormal sperm function, misshapen sperm or the inability to deliver sperm. When couples are having difficulty conceiving, both partners should be thoroughly evaluated.…

Sexual selection has long been recognized as a powerful evolutionary process having important consequences on reproductive behaviour, morphology, and fitness (Birkhead and Pizzari, 2002). Sexual selection research has often focused on pre-copulatory mate choice; however, the discovery of female promiscuity and polyandry has lead to the realization that mate choice continues to operate after copulation (Birkhead and Pizzari, 2002). For males, it is obvious that promiscuity has evolved to increase…

What is a shapeshifter? Shapeshifters are human like creatures that learn how to change their form to whatever or whoever they want. Some common versions of these creatures include, but are not limited to, vampires, werewolves, skinwalkers, and wendigos. Shapeshifters are seen commonly through mythology. Shapeshifters are myths, which means that there are multiple versions of them. One version is from the tv series Supernatural. In the show Supernatural the shapeshifters can become anyone they…

Sexual selection refers to a natural selection process, which arises through preference by one sex for specific characteristics in the member or members of the other sex. The purpose of this paper is to complete and present the requirements of the assignment on the Evolution Biology. The paper covers the issues that pertain to sexual selection such as the theoretical background as well as the evidence for models of mate choice. Furthermore, the writer covers the aspects of game theory and animal…

Is the rise of new birth technologies a revolutionary way to give infertile mothers and/or fathers a way to conceive, or does it simply a new form of slavery where children are commodities of their parents? The new technologies, including surrogacy and in vetro fertilisation (IVF) treatment, aim to provide a way to have biological children or conceive when it was previously difficult or impossible to naturally. However, these new advancements raise the question of where we draw the line between…

Since the beginning of time women have struggled with infertility problems. The old theory of getting married and having a family are becoming harder to establish. A lot of women today are having a lot of issues, either from waiting too late to start a family or fertility problems. A woman’s ability to get pregnant start to decline in her mid-twenties and it gets more and more harder with time There are billions of women, even couples that are suffering from the ability to reproduce on their own…

It can show how the different phenotypes are apply and how something can be proved by the punnett squares. What was determined and what can you conclude from this work? We can determine that the Dominant and Recessive reproduction is true in this scenario and that you need a lot more information to figure out whether it is autosomal/sexlinked. From the data we figured out that the wild type if dominant and Type C is recessive. We rejected the null hypothesis and we think…

It is absolutely astounding the number of people that still believe some of those old wives tales about male fertility. The fact is that those myths are deeply embedded into our culture and we simply assume that they are true. Most men with infertility problems go along with the myths that might ring true. However, it seems like we should dig a little deeper into those myths to get rid of some of the confusion concerning fertility or infertility problems. Men Stay Fertile Into Their Golden…