If natural selection can only operate on existing variants, where does all that variation come from? If, as Darwin (1868) and Huxley concluded, variation arose from changes in development, then how could the development of an embryo change when development is so finely tuned and complex?

Q: nucleation site and moved into the axon. It was noted in the text that cytoplasmic dynein is respons...

A:       INTRODUCTION          In a particular cells there are proteins, organelles, vesicles and other...

Q: The allele for tall is dominant to the allele for short in pea plants. Which of the following would ...

A: The allele for tall is dominant over short as mentioned in the question. Let us consider, T for domi...

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A: Dihybrid cross It refers to the genetic cross which involves mating of two organisms that are hybrid...

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A: The term epigenetics is associated with the study of environment and behavior causing alterations in...

Q: If a parent cell has 16 chromosomes, how many sister chromatids will be present after duplication of...

A: Mitosis It produces two genetically identical cells. Mitosis is referred to in the following stages...

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A: Enzymes are proteins with catalytic power.

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A:

Q: You are required to completed an in-depth study of a common disease bacterial spot affiliated with t...

A: Bacterial brown spot disease  Bacterial brown spot is a disease of dry beans caused by bacterium Pse...

Q: The probability of having an individual with a least a heterozygous gene pair on its genotype from t...

A: Introduction: Genotype is the inheritable information carried by all living organisms. This stored i...

Q: Explain the purpose of splicing the primary transcript and know the name of the ribonucleoprotein co...

A: Splicing makes genes more modular, allowing new combinations of exons to be created during evolution...

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Q: Chi-square computed

A: Chi-squared tests are a statistical measure that are used to determine whether the difference betwee...

Q: Quasi-experiments

A: A quasi-experiment is an empirical interventional study used to estimate the causal impact of an int...

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Q: How is filament polarity detectable?

A: Microfilaments in the cell form structures associated with the plasma membrane.

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A: Venom are substances which target a particular biochemical or metabolic pathway in target individual...

Q: An RNA that functions as an enzyme is a ________ .a. protein c. ribosomeb. protocell d. ribozyme

A: Introduction: RNA is a single-stranded molecule in many of its biological roles and consists of a mu...

Q: Imagine a human trait that is inherited via genetic maternal effect and found on the X chromosome (x...

A: It is given that the trait is X linked recessive. It means the trait is found when all X chromosomes...

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Q: Which of the following are related to the health policy trilemma? (Please choose all that may apply)...

A: Health policy trilemma. 

Q: What are selectable marker genes ? Explain the role of selectable marker gene ?

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A:

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Q: Explain hospital and gas system (deep details)

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Q: Describe three (3) ways in which the primary transcript is modified as it is converted to mRNA.

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Q: In the Gram staining procedure, how do the dyes able to distinguish Gram positive from Gram negative...

A: Gram staining, commonly known as Gram's technique, is a staining technique that is utlised to divide...

Q: If there are 9 chromosome pairs, how many univalents are there at anaphase?

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Q: Why Is DNA Twisted?

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Q: Illustrate how a change in chromosome organization may affect the activity of a gene.

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Q: WHAT IS THE ECONOMICS IMPORTANCE OF PENICILLUM DIGITATUM? WITH SOURCE PLEASE.

A: Answer 

Q: define the termAcupuncture.  explain how it plays a role in managing and controlling clinical pain.

A:

Q: Explain the several key properties of DNA vectors ?

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Q: Describe the possible roles of allosteric modulation in theregulation of metabolic pathways.

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Q: , yellow pods are dominant to green pc en a pure yellow plant and a hybrid yell-

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Q: Chronologically arrange the evolutionary events, with 1being the earliest and 6 the most recent.___ ...

A: Chronological event describe the timing of event as it occurred in the event of time period. Basical...

Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.