Evidence for Evolution
"Survival of the fittest" is known as...
Natural Selection
The type of speciation in which a population is divided by a physical barrier
Allopatric speciation
The purpose of the root system in plants is to.. (2 answers)
Anchor the plant to the ground
Absorbs water and minerals through root hairs
The growth response of a plant to a stimulus is known as a
tropism
Body system that sends signals to control body functions and responses
Nervous system
A symbiotic relationship in which both organisms benefit is known as
mutualism
The movement of individuals and their alleles into and out of a population is known as..
Examples include migration & interbreeding/seed & pollen dispersal. This increases genetic variation.
Gene flow
The type of speciation in which new species form in the same area due to genetic changes or behaviors that lead to reproductive isolation
Sympatric speciation
The shoot system of the plants include..(3 answers)
stem
leaves
flower
Tips of the shoot grow toward light needed for photosynthesis
Phototropism
Acts as a barrier to protect the body from external factors. Includes hair, skin, & nails
Integumentary system
An environmental change that harms which organism would cause the most instability in an ecosystem
Producers
The change in allele frequency due to chance events.
This always reduces the genetic variation in a population
Genetic drift
Species undergo change at a slow and steady pace over long periods of time
Gradualism
Type of vascular tissue that transports water and minerals in one direction, from the roots up to the rest of the plant
Xylem
A plant's response to gravity
System that defends against disease and pathogens
Immune system
A symbiotic relationship in which one organism benefits while the other is unaffected is known as
commensalism
The 2 types of genetic drift are...
Bottleneck effect
Founder effect
Species remain relatively unchanged for long periods, followed by short bursts of rapid evolutionary change
Type of vascular tissue that transports nutrients dissolved in water, including sugars, hormones, and amino acids, throughout the plant in both directions.
Glucose, made in the leaves during photosynthesis, travels to other parts of the plant through this.
Phloem
A plant's response to touch
Thigmotropism
- transports blood, nutrients, and gases
Circulatory system
A symbiotic relationship in which one organism benefits while the other is harmed is known as
parasitism
Refers to an organism’s ability to survive and reproduce in its current environment
Biological fitness
This record reveals information about an organism such as age, location, and sequence of evolutionary changes
Are small openings in the epidermis where gas exchange and water loss occur..
Regulate water loss by opening and closing
Stomata
A plant's response to water
Hydrotropism
System that produces hormones that regulate body processes
Endocrine system
When harmful substances become more concentrated as they move up the food chain, causing the most harm to top predators is known as
biomagnification
The formation of a new species is known as
Speciation
Structures that are similar in structure, share a common ancestor, but have different functions are known as
Homologous structures
The purpose of brightly colored petals on a plant is to...
attract pollinators
The hormone that causes cells on the shaded side of the stem to elongate and bend toward the light
Auxin
System that breaks down food and absorbs nutrients
Digestive
In order for Nitrogen to be usable to organisms, it must be fixed or fixated. 2 ways in which this occurs is through..
bacteria in soil
lightning