Question
3. Think about the PLACE where human fertilization and development take place, these are NOT the same for all animals. Based on the place (environment/internal location) in which the following animals develop, complete the following chart to predict whether or not the animals have a placenta. Humans are done for you. (5) Animal & Fertilization occurs & Development Occurs & Placenta: yes/no, justify your answer Human & in oviduct & in uterus of mother & }(l) Yes, the fetus develops inside the placenta which attaches the developing embryo to the inside of the mother. Frog & & & Turtle & & & Sea Star & & & Pike & & & Crow & & &
Solution
4.7
(271 Votes)
Edwin
Master ยท Tutor for 5 years
Answer
### \begin{array}{|c|c|c|c|}\hline\ Animal\ &\ Fertilization\ occurs\ &\ Development\ Occurs\ &\ Placenta:\ yes/no,\ justify\ your\ answer\ \\\hline\ Human\ &\ in\ oviduct\ &\ in\ uterus\ of\ mother\ &\ Yes,\ the\ fetus\ develops\ inside\ the\ placenta\ which\ attaches\ the\ developing\ embryo\ to\ the\ inside\ of\ the\ mother.\ \\\hline\ Frog\ &\ Externally,\ in\ water\ &\ Externally,\ in\ water\ &\ No,\ frogs\ lay\ eggs\ in\ water,\ and\ there\ is\ no\ internal\ development\ requiring\ a\ placenta.\ \\\hline\ Turtle\ &\ Internally\ &\ Externally,\ as\ eggs\ on\ land\ &\ No,\ turtles\ lay\ eggs,\ and\ development\ occurs\ outside\ the\ mother's\ body.\ \\\hline\ Sea\ Star\ &\ Externally,\ in\ water\ &\ Externally,\ in\ water\ &\ No,\ sea\ stars\ release\ eggs\ into\ the\ water,\ and\ development\ occurs\ externally.\ \\\hline\ Pike\ &\ Externally,\ in\ water\ &\ Externally,\ in\ water\ &\ No,\ pikes\ are\ fish\ that\ lay\ eggs\ in\ water,\ and\ development\ occurs\ externally.\ \\\hline\ Crow\ &\ Internally\ &\ Externally,\ as\ eggs\ in\ a\ nest\ &\ No,\ crows\ lay\ eggs,\ and\ development\ occurs\ outside\ the\ mother's\ body.\ \\\hline\end{array}
Explanation
## Step 1: Understand the Role of Placenta### The placenta is an organ that develops in the uterus during pregnancy. It provides oxygen and nutrients to the growing baby and removes waste products from the baby's blood. It attaches to the wall of the uterus, and the baby's umbilical cord arises from it. Animals with internal development in the uterus typically have a placenta.## Step 2: Analyze Fertilization and Development Locations for Each Animal### We need to determine where fertilization and development occur for each animal to predict the presence of a placenta.- **Frog**: - **Fertilization occurs**: Externally, usually in water. - **Development occurs**: Externally, in water as eggs. - **Placenta**: No, because frogs lay eggs in water, and there is no internal development requiring a placenta.- **Turtle**: - **Fertilization occurs**: Internally, within the female's body. - **Development occurs**: Externally, as eggs laid on land. - **Placenta**: No, turtles lay eggs, and development occurs outside the mother's body.- **Sea Star**: - **Fertilization occurs**: Externally, in water. - **Development occurs**: Externally, in water. - **Placenta**: No, sea stars release eggs into the water, and development occurs externally.- **Pike**: - **Fertilization occurs**: Externally, in water. - **Development occurs**: Externally, in water. - **Placenta**: No, pikes are fish that lay eggs in water, and development occurs externally.- **Crow**: - **Fertilization occurs**: Internally, within the female's body. - **Development occurs**: Externally, as eggs in a nest. - **Placenta**: No, crows lay eggs, and development occurs outside the mother's body.## Step 3: Fill in the Table Based on Analysis### Using the analysis above, fill in the table for each animal regarding fertilization, development, and the presence of a placenta.