Part 1: Design a database of endangered and extinct species. This could be a table or a spreadsheet with the
following categories of information: scientific name, classification (e. g., mammal, reptile, amphibian,
insect, etc.), habitat (rainforest, ocean, etc.), cause of endangerment or extinction.
Use the IUCN Red List for information or the Bagheera website. Include at least 10 species in your
database. Save your database file for submission to your teacher. You may select from the following:
1. black lemur
2. black rhino
3. black footed ferret
4. dwarf crocodile
5. elephant
6. Florida manatee
7. giant otter
8. grey whale
9. hyacinth macaw
10. komodo dragon
11. leatherback sea turtle
Part 2:
Make a bar graph that plots the number of species as a function of cause of endangerment.
Part 3:
Brainstorm some ways that we can decrease the illegal trade and hunting of endangered wildlife. Write a
script for a 60-second commercial to help persuade hunters and fishers to take wildlife responsibly. In
your commercial, inform they why illegal hunting or overfishing can harm an ecosystem and tell them
about laws that deal with this issue.
Submission Requirements:
• A database
• A bar graph
• A script

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.