Видео 109
Просмотров 2 608

46:09

11.2 Animal Form and Function Lecture Video

57:25

10.4 Speciation

35:39

10.3 Evidence of Evolution

38:19

10.2 Mechanisms of Evolution

36:18

10.1 Discovering how Populations Change

59:02

11.4 Homeostasis

This is the final video covering Chapter 11: Animal Structure and Function. In this video, 11.4: Homeostasis, we will examine how animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Homeostasis means to maintain dynamic equilibrium in the body. It is dynamic because it is constantly adjusting to the changes that the body's systems encounter. It is equilibrium because body functions are kept within specific ranges.

Видео

46:09

11.3 Animal Primary Tissues

Просмотров 614 дней назад

This is the second video covering Chapter 11: Animal Structure and Function. In this video, 11.3: Animal Primary Tissues, we will look at the tissues of multicellular, complex animals: epithelial, connective, muscle, and nervous. Recall that tissues are groups of similar cells carrying out related functions. These tissues combine to form organs that have specific specialized functions within th...

11.2 Animal Form and Function Lecture Video

57:25

11.2 Animal Form and Function Lecture Video

Просмотров 2914 дней назад

This is the first video covering Chapter 11: Animal Structure and Function. In this video, 11.2: Animal Form and Function, we learn about the variety of form and functions found in animals. Animals have a distinct body plan that limits their size and shape. Animals' bodies are designed to interact with their environment. Therefore, a large amount of information about the structure of an organis...

35:39

10.4 Speciation

Просмотров 514 дней назад

This is the final video covering Chapter 10: Evolution and Its Process. In this video, 10.4: Speciation, we learn that speciation occurs along two main pathways: geographic separation (allopatric speciation) and through mechanisms that occur within a shared habitat (sympatric speciation). Both pathways force reproductive isolation between populations. Once the populations are isolated, evolutio...

38:19

10.3 Evidence of Evolution

Просмотров 3321 день назад

This is the third video covering Chapter 10: Evolution and Its Process. In this video, 10.3: Evidence of Evolution, we will examine the evidence for evolution found at all levels of organization in living things and in the extinct species we know about through fossils. Fossils provide evidence for the evolutionary change through now extinct forms that led to modern species. The anatomy of speci...

36:18

10.2 Mechanisms of Evolution

Просмотров 1521 день назад

This is the second video covering Chapter 10: Evolution and Its Process. In this video, 10.2 Mechanisms of Evolution, we cover the four factors that can change the allele frequencies of a population. Natural selection works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities. Mutations introduce new alleles to a population...

59:02

10.1 Discovering how Populations Change

Просмотров 1221 день назад

This is the first video covering Chapter 10: Evolution and Its Process. In this video, 10.1: Discovering How Populations Change, we look at how evolution by natural selection arises from three conditions: individuals within a species vary, some of those variations are heritable, and organisms have more offspring than resources can support. The consequence is that individuals with relatively adv...

33:21

9.3 Genomics and Proteomics

Просмотров 321 день назад

This is the final video covering Chapter 9: Biotechnology. In this video, 9.3: Genomic and Proteomics, we look at how genomic mapping is similar to solving a big, complicated puzzle with pieces of information coming from laboratories all over the world. Genetic maps provide an outline for the location of genes within a genome, and they estimate the distance between genes and genetic markers on ...

9.2 Biotechnology in Medicine and Agriculture

28:08

9.2 Biotechnology in Medicine and Agriculture

Просмотров 1421 день назад

This is the second video covering Chapter 9: Biotechnology. In this video, 9.2: Biotechnology in Medicine and Agriculture, we look at how genetic testing can be performed to identify disease-causing genes, and can be used to benefit affected individuals and their relatives who have not developed disease symptoms yet. Gene therapy- by which functioning genes are incorporated into the genomes of ...

1:07:48

9.1 Cloning and Genetic Engineering

Просмотров 1421 день назад

This is the first video covering Chapter 9: Biotechnology. In this video, 9.1: Cloning and Genetic Engineering, we look at how nucleic acids can be isolated from cells for the purposes of further analyses by breaking open the cells and enzymatically destroying all other major macromolecules. Fragmented or whole chromosomes can be separated on the basis of size by gel electrophoresis. DNA can be...

26:06

8.5 How Genes are Regulated

Просмотров 821 день назад

This is the final video covering Chapter 8: Molecular Biology. In this video, 8.5: How Genes are Regulated, we learned that all organisms and cells control or regulate the transcription and translation of their DNA into protein. The process of turning on a gene to produce RNA and protein is called gene expression. Whether in a simple unicellular organism or in a complex multicellular organism, ...

35:46

8.4 Translation

Просмотров 8Месяц назад

This is the fourth video covering Chapter 8: Molecular Biology. In this video, 8.4: Translation, we learning about the synthesis of proteins, which is one of a cell's most energy-consuming metabolic processes. In turn, proteins account for more mass than any other component of living organisms (with the exception of water), and proteins perform a wide variety of the functions of a cell. The pro...

34:19

8.3 Transcription

Просмотров 12Месяц назад

This is the third video covering Chapter 8: Molecular Biology. In this video, 8.3: Transcription, we learn about this second function of DNA (the first was replication) and how it provides the information needed to construct the proteins necessary so that the cell can perform all of its functions. To do this, the DNA is "read" or transcribed into an mRNA molecule. The mRNA then provides the cod...

53:07

8.2 DNA Replication

Просмотров 14Месяц назад

This is the second video covering Chapter 8: Molecular Biology. In this video, 8.2: DNA Replication, we learn how when a cell divides, it is important that each daughter cell receives an identical copy of the DNA. This is accomplished by the process of DNA replication. The replication of DNA occurs during the synthesis phase, or the S phase, of the cell cycle, before the cell enters mitosis or ...

37:20

8.1 The Structure of DNA

Просмотров 12Месяц назад

This is the first video that covers chapter 8: Molecular Biology. In this video, 8.1: The Structure of DNA, we review the DNA molecule as a polymer of nucleotides. Each nucleotide is composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group. There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine). A DNA...