It's Giving Density
This value is calculated using the formula: number of individuals ÷ unit area.
Population Density
This growth curve is shaped like the letter J, and occurs when resources are unlimited.
Exponential Growth
True or False: A population crash can occur when a species exceeds its environment's carrying capacity.
TRUE
This term is defined as the use of living organisms to develop products or technologies that improve human health, agriculture and the environment.
Biotechnology
This GM crop was specifically engineered to fight vitamin A deficiency.
Golden Rice
This type of spatial distribution happens when individuals are evenly spaced.
Uniform Distribution
This term describes the maximum number of individuals an environment's resources can sustain over time.
Carrying Capacity (K)
This category of limiting factor affects a population the same way no matter its size.
Density-independent factor
Name the technique of traditional biotechnology used to create foods like cheese, yogurt and nata de coco.
Fermentation
pest and disease resistance / drought tolerance / higher yield / nutritional enhancement
Pandas are restricted mostly to regions of China with bamboo, while cockroaches thrive almost anywhere. Which population characteristic does this contrast illustrate, and what limits it in the panda's case (biotic factor? or abiotic factor?)
Geographic range - biotic factor (bamboo availability)
A bacteria colony is placed in a petri dish with fresh nutrients. For the first few hours it grows almost exactly like exponential growth, but then resources start running low and its growth rate begins to drop. Which phase of logistic growth is the last part?
Phase 3 (the stationary phase)
Classify oil spills as density-dependent or density-independent, and explain why.
density-independent; it's a human activity that removes individuals from a population regardless of how large or small that population is
This is the key difference that separates modern biotechnology from traditional biotechnology.
Direct manipulation of an organism's DNA
Biochips can restore hearing and monitor glucose levels, but they also raise this ethical concern related to personal information.
Privacy or cybersecurity (concerns over genetic/medical data collected by biochips)
After a wildfire wipes out most of a field, insect populations rebound within weeks, but the deer population takes years to recover. Which reproductive strategy/pattern explains the insect's fast rebound, and which explains the deer's slow one?
insects (r-strategist); deer (K-strategist)
A population of wild goats is introduced to an island with no predators and abundant vegetation. For the first few years, its numbers grow following a J-shaped curve. Then a wildfire sweeps through and destroys much of the vegetation. What happens to (1) the shape of the population's growth curve and (2) the island's carrying capacity as a result of the wildfire (increases or decreases)?
shifts to logistic growth (S-shaped); carrying capacity (K) decreases as wildfire destroyed food supply.
This is the sudden, sharp decline in a population that occurs when it exceeds its carrying capacity.
Put the steps of recombinant DNA technology in the correct order:
Insertion - Ligation - Cutting - Isolation
Isolation - Cutting - Ligation - Insertion
Name one environmental risk of biotechnology related to GMO crops spreading beyond their intended crop.
genetic pollution / creation of hard to control "superweeds" / biodiversity loss / reducing natural genetic diversity
A 12m2 tide pool has a population density of 8 crabs/m2. A nearby tide pool has 180 crabs. If a third tide pool is 15m2 and has the same crab density as the first pool, does it hold more of fewer crabs than the second pool -- and what's the difference?
Fewer, by 60 crabs
Why do most populations in nature follow logistic growth instead of sustaining exponential growth?
Environmental resistance / Limiting factors restrains growth
Name one density-dependent limiting factor example and explain how crowding makes each one worse.
Increases competition for resources. Predators find prey easier. Parasitism/disease spread faster through a denser population
A company notices a wild bacterium naturally breaks down plastic, and simply lets it multiply in large tanks to treat plastic waste. Later, they insert its plastic-degrading gene into a different faster-growing bacterium so it can be mass-produced. Did the company use traditional biotechnology? Modern biotechnology? or both?
Both. Growing natural bacterium in tanks - traditional biotechnology; Inserting its gene into another bacterium - modern biotechnology
What was the gene editing tool used by Chinese biophysicist He Jiankui to modify human embryos that became a controversial topic and example of ethical concern in modern biotechnology?
CRISPR-Cas9