Reproductive Systems
What process do spermatocytes undergo to become spermatid (sperm)?
Meiosis
Name 3 things that can increase your chance of cancer?
Smoking, pesticides, UV radiation, asbestos, processed meats, radiation and more.
What are Darwin’s 3 key concepts that tie together the Theory of Evolution?
The unity of life, the diversity of life, and the match between organism’s and their environment.
What is an ecosystem?
A geographic area that consists of biotic and abiotic components.
What contraceptive method is the most effective at preventing pregnancy?
IUD
What is cancer?
Out-of-control growth in mutant cells.
Did humans evolve from chimpanzees?
No. Humans and chimpanzees evolved from a common ape ancestor.
What are 2 threats to our ecosystems?
Land clearing, water pollution, air pollution, over-harvesting.
Where are the female gametes released from?
Ovaries
Free radicals are unstable molecules that can increase chances of cancer. What substance can neutralize free radicals in the body?
Antioxidants
Why do human early embryos have a tail?
It is a vestigial trait, meaning our ancestors had tails.
What are 2 ways you can help improve the health of our environment?
Buy less stuff, eat less meat, use less water and electricity, use public transportation, don’t use disposable products.
What happens to unfertilized eggs in a female?
Degenerate and absorbed into the body or discharged during menstruation.
What is the difference between a benign tumor and a cancerous tumor?
A benign tumor are cancerous cells in one area. A cancerous tumor are cancer cells that spread throughout the body.
What is the difference between natural selection and artificial selection?
Artificial selection is when humans choose to breed organism’s to select and enhance certain traits. Natural selection is when certain individuals inherited traits tend to survive and reproduce at higher rates.
What type of organism is at the bottom of the food chain?
Primary producers (photosynthetic organisms)
How is every sperm and egg cell genetically unique?
Crossing over and independent assortment
What are 2 ways cancer is detected?
MRIs, x-rays, biopsy, ultrasounds, checking for lumps.
Give an example of convergent evolution not from the PowerPoint.
Cacti spines and porcupines both have pines at a means of self-defense.
After reintroducing wolves in Yellowstone National Park, the shapes of the rivers changed. How did the wolves’ presence change the rivers?
The wolves chased and ate deer. The deer had to move more and could not stay and eat all the vegetation in one spot. More vegetation grew around the rivers, reducing erosion around the rivers.