BIOLOGY ADVENTURES

PRESENTS

v Sea Urchin Embryology

Discover and Explore the secrets of Animal Reproduction

Section 1

Field Trip by Pamela Miller

Lecture by Dr. David Epel

Experiment by Dr. Jason Hodin

Section 2

My experiment

Dr. Epel - Hopkins Marine StationStanford UniversityWELCOME!Skip Intro

The Experienceat Hopkins Marine StationVisit the researchers at the Hopkins Marine Station and discover the reproduction and life of the Sea Urchin Do the experiment, manage the variables and report the observationsMy ExperimentBIOLOGY ADVENTURES Sea Urchin EmbryologyFor the best experience with this site, click down the left column first then the right.

The Experienceat Hopkins Marine StationThe late Daniel Mazia was a biological research scientist who first studied cell embryology using Sea Urchins. Scientists at Marine Hopkins Station of Stanford University work on similar cell biology experiments. In this experiment, the eggs of sea urchins are externally fertilized with sea urchin sperms and the various developmental stages of the fertilization process are observed with a microscope.What is it ?LectureHow it works?Class ReportExperimentAboutResearchersField TripWhat is it ?ClassesBiology LectureUrchins LifeHow it works?The experimentClass ReportAboutResearchersWhat is it ?ClassesBiology LectureUrchins LifeHow it works?The experimentClass ReportAboutResearchersWhat is it ?ClassesBiology LectureUrchins LifeHow it works?The experimentClass ReportAboutResearchersWhat it is LectureHow it worksTest ResultsExperimentAbout UsField TripHopkins MarineStation

The Experienceat Hopkins Marine StationTeacher Pam Miller will conduct the field trip, Dr. David Epel the lecture, and Dr. Jason Hodin the experiment, so in this section, you will learn about the history of fertilization, the various forms of life, and the life of sea urchins. In the experiment, you will learn about the different stages of fertilization such as mitosis, nuclear migration, zygota, and gastrulation. You will receive questions at the end of every topic to reinforce your understanding.

Teacher Pam Miller will show us the environment and life ofsea urchins in the Coast of California (click on the video to see the entire field trip without interruption, or click on each chapter to see them selectively and to take a test after each) HabitatFeedingSpeciesInterdependenceReproducingThe Experienceat Hopkins Marine Station

The Experienceat Hopkins Marine StationTEST YOURSELF!Q1 Q2 Q3 Q4 Q5 Q6 Q7How nudibranch reproduces?

Male copulate on one female

Several male copulate one female

Hermaphrodite copulate hermaphrodite

Three or more hermaphrodites copulating together

The Experienceat Hopkins Marine StationTEST YOURSELF!Q1 Q2 Q3 Q4 Q5 Q6 Q7How nudibranch reproduce?

Male copulate on one female

Several male copulate one female

Hermaphrodite copulate hermaphrodite

Three or more hermaphrodites copulating together

The Experienceat Hopkins Marine StationTEST YOURSELF!Q1 Q2 Q3 Q4 Q5 Q6 Q7How nudibranch reproduce?

Male copulate on one female

Several male copulate one female

Hermaphrodite copulate hermaphrodite

Three or more hermaphrodites copulating together

Very Good. You answered correctly. Now try a slightly more difficult question!

Developmental BiologyEmbryoEmbryologyBiologySea Urchin EmbryologyProfessor Epel will explain the origins and meaning of the EmbryologyThe Experienceat Hopkins Marine Station

Developmental BiologyEmbryoEmbryologyBiologySea Urchin EmbryologyThe Experienceat Hopkins Marine StationDevelopmental BiologyEmbryoEmbryologyBiologySea Urchin EmbryologyBiology is the study, or science, of life. It is concerned with the characteristics and behaviors of organisms, how species and individuals come into existence, and the interactions they have with each other and with the environment.

Developmental BiologyEmbryoEmbryologyBiologySea Urchin EmbryologyThe Experienceat Hopkins Marine StationTEST YOURSELF!Q1 Q2 Q3 Q4 Q5 Q6 Q7How many domains of living things are there?

one

two

three

four

Developmental biology is the study of the process by which living things grow and develop. Modern developmental biology studies the genetic control of cell growth, differentiation and "morphogenesis,"Developmental BiologyEmbryoSea Urchin EmbryologyEmbryologyBiologyThe Experienceat Hopkins Marine Station

Embryology is the subdivision of developmental biology that studies embryos and their development. The formation and development of an embryo is known as embryogenesis.Developmental BiologyEmbryoEmbryologySea Urchin EmbryologyBiologyThe Experienceat Hopkins Marine Station

Developmental BiologyEmbryoEmbryologyAn embryo is an eukaryote in its earliest stage of development.

In Animals: The embryo of vertebrates is defined as the organism between the first division of the zygote (a fertilized ovum) until it becomes a fetus. An embryo is called a fetus at a more advanced stage of development and up until birth or hatching. Stages: morula-> blastula->gastrula. Sea Urchin EmbryologyBiologyThe Experienceat Hopkins Marine Station

Developmental BiologyEmbryoEmbryologySea Urchin Embryology Sea urchins are a useful model system for studying many problems in early development. Gametes can be obtained easily, sterility is not required, and the eggs and early embryos of many commonly used species are beautifully transparent. BiologyThe Experienceat Hopkins Marine Station

2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationThe experiment comprises of four sections. Pay attention to how Dr. Jason Hodin first forms a hypothesis, collects data, analyzes data and draws a conclusion. At the end of each section, you will get a chance to test your understanding of the material.

Step 1

Collecting Sperms and Ovaries, mix, and put them on the slide2. Fertilization4. Growing up3. Cell Division2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationNow we extract gametes from male and female sea urchins male (sperm) female (eggs)

Step 1

Collecting Sperms and Ovaries, mix, and put them on the slide2. Fertilization4. Growing up3. Cell Division2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationUsing a microscope, we observe eggs

Step 1

Collecting Sperms and Ovaries, mix, and put them on the slide2. Fertilization4. Growing up3. Cell Division2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationWe can observe sea urchin sperm

Step 1

Collecting Sperms and Ovaries, mix, and put them on the slide2. Fertilization4. Growing up3. Cell Division2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationAnd human sperm

Step 1

Collecting Sperms and Ovaries, mix, and put them on the slide2. Fertilization4. Growing up3. Cell Division2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationTEST YOURSELF!Q1 Q2 Q3 Q4 Q5 Q6 Q7Whats the color of an unfertilized urchin egg?

Yellow

White

Purple

Red

Step 1

Collecting Sperms and Ovaries, mix, and put them on the slide2. Fertilization4. Growing up3. Cell Division2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationTEST YOURSELF!Q1 Q2 Q3 Q4 Q5 Q6 Q7Whats the color of an unfertilized urchin egg?

Yellow

White

Purple

Red

Step 1

Collecting Sperms and Ovaries, mix, and put them on the slide2. Fertilization4. Growing up3. Cell Division2. Fertilization4. Growing up1. Gametes3. Cell DivisionStepsThe Experienceat Hopkins Marine StationTEST YOURSELF!Q1 Q2 Q3 Q4 Q5 Q6 Q7Sorry. Wrong Answer. Click on the above video to repeat the part on gamete color.

Whats the color of an unfertilized urchin egg?

Yellow

White

Purple

Red

The Experienceat Hopkins Marine StationPerformance

80% Lecture90% Field Trip50% Experiment

Recommendation

It appears that you can strengthen your knowledge on the experiment section. We recommend you repeat the development section again.

Grades

3.5 GPA3.8 GPA2.0 GPA

Overall Grade

2.8 GPA

Answers/Questions

28/3533/3535/35

Dr. David EpelPamela MillerDr. Jason HodinCV CV CV Dr. Decker WalkerResearchMediaDevelopmentSara KalantariWupingLuCV CV CV CV CV DeepakKumarCV The Experienceat Hopkins Marine Station

Hopkins Marine Station, located on the Monterey Peninsula in California, is a marine biology research and educational facility that operates as a branch of Stanford University's Department of Biological Sciences. Founded in 1892, Hopkins was the first marine laboratory to be established on the American Pacific coast. Since that time, many notable scientists, as well as undergraduate and graduate students have come to the Station to study and work towards a better understanding of the ocean and its species.The Experienceat Hopkins Marine Station

The Experienceat Hopkins Marine StationVisit the researchers at the Hopkins Marine Station and discover the reproduction and life of the Sea Urchin Do the experiment, manage the variables and report the observationsMy ExperimentWhat is it ?LectureHow it works?Class ReportExperimentAboutResearchersField TripWhat is it ?ClassesBiology LectureUrchins LifeHow it works?The experimentClass ReportAboutResearchersWhat is it ?ClassesBiology LectureUrchins LifeHow it works?The experimentClass ReportAboutResearchersWhat is it ?ClassesBiology LectureUrchins LifeHow it works?The experimentClass ReportAboutResearchersWhat it is LectureHow it worksTest ResultsExperimentAbout UsField TripHopkins MarineStationpollutionGrowing upWhat it isHow it worksMy experimentDiscussion BoardTest ResultsFAQSite MapBIOLOGY ADVENTURES Sea Urchin EmbryologyFor a better understanding of the site click in order every menu bar from top to down, first the left column, then the right column