Origin and Evolution of Life Activity Introduction
A virtual tour is a way to inform someone of the facts and details about a location or object that
would otherwise be inaccessible. Virtual tours can be brochures, web sites, presentations, or
just about anything else you can think of to introduce someone to all aspects of a topic. To get a
better idea of the kind of product you can create for this activity, explore “virtual tours” in a
search online.
Procedures:
1. Use the fossil reference chart in the lesson to select an index fossil.
(Do not select paradoxides pinus; this index fossil was selected for the student
example provided in the lesson.)
2. Research the following details about your index fossil:
• list its physical characteristics
• describe any known or theorized behavioral characteristics
• identify the period of time in which it first appears
• describe its biological evolution and phylogeny
• describe location/s where this index fossil has been found
• describe any related organisms alive today and their similarities to your index
fossil
• describe any common ancestors and their similarities to your index fossil
• at least three images (index fossil, related organisms, or common ancestors)
3. Create a tour of your index fossil. You can choose to present the information as a slide
show, brochure, web site, picture book, or any other creative format of your choice.
Consult your instructor for other ideas.
4. Include a minimum of six discussion points, or “stops,” on your tour.
5. Cite your references for the information used in the tour.
6. Write a summary paragraph to answer the reflection questions at the end of your tour.
Reflection Questions
1. Explain how biological evolution is supported by the fossil record.
2. Why is natural selection a mechanism for biological change?
3. How does chemical evolution explain the origin of life on Earth?
4. Explain why scientific theories, such as biological and chemical evolution, represent the
strongest explanation of the changes observed in the fossil record.
5. How can scientific theories on evolution and the fossil record change over time?

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.

i believe the correct answer is the virus gets an envelope that contains host molecules when it leaves the host cell.

explanation:

during the bidding/release stage of a virus, it encapsulates itself with part of the membrane of the host cells in this case the cells of the monkey and is the reason as to why the scientist found the genetic material of the monkey on the viral cell surface.

further explanation

to understand this answer, we have to know the cycle a virus undergoes to replicate. a virus is basically a bunch of genetic material enclosed in a capsule and lacks any machinery or organelles to ensure their survival so they must enter a host cell in order to get the environment needed to survive. some viruses enter and lyse(destroy) the host cell after they have replicated and undergo the lytic cycle while some enter and leave the cell intact after replicating and these undergo a lysogenic cycle. to enter the cell, they undergo the first process called attachment by binding to specific receptors and co-receptors on the surface of the host cell. after attaching to the cell, they start the second phase called penetration where virus enters or is engulfed whole by the host cell through a process called endocytosis. it is the same process that a cell takes up materials it needs or pathogens around it. uncoating of the virus then happens after the virus has been engulfed and is the third stage. the virus then undergoes releasing of its genetic material in the host's matrix.   the materials then enter the nucleus and undergo biosynthesis by adding themselves in strands of rna being translated and then copies of the virus are produced in addition to the host genetic material. the material/newly formed viral material then undergoes assembly inside the host cell and form a capsule around them. the virus undergoes the last release/budding stage by binding to the host membrane and pushing outwards. in doing so when they tear away from the host membrane, they pick up the genetic material from the membrane of the host cell to form their envelope.

learn more:

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level: high school