Parts of a Flower
This specific sac-like structure sits at the top of the filament and is responsible for producing pollen grains.
What is "anther"
The process of using the information on mRNA to produce a protein is called
a. replication
b. transcription
c. translation
d. transduction
c. translation
During Darwin’s travels and investigations while aboard the H.M.S. Beagle, he noted that there were distinct variations in the beaks of finches. What was his hypothesis regarding these differences?
a. The differences were due to changes in behaviors of the finches.
b. The differences were because they arrived as separate species.
c. The differences were the result of acquired characteristics, based on each finch species food source.
d. The differences were due to changes over time, based on each finch species food source.
d. The differences were due to changes over time, based on each finch species food source.
Living parts of an ecosystem
What are biotic factors?
Which statement best describes homeostasis in human physiology?
A. The process of generating energy for cellular functions.
B. The ability to maintain a relatively constant internal environment despite external changes.
C. The mechanism by which the body responds to infections.
D. The tendency for an organism's internal environment to exactly match the outside environment.
B. The ability to maintain a relatively constant internal environment despite external changes.
What is the function of petals?
To attract pollinators
During transcription, a DNA sequence of TAC is transcribed into which complementary mRNA codon?
A) ATG
B) AUG
C) UAC
D) AUC
B) AUG
The process where organisms better adapted to their environment survive and reproduce.
What is natural selection?
Organisms that make their own food
What are producers?
What is the primary difference between negative and positive feedback in biology?
The Stigma, Style, and Ovary make up the female part of the flower called the ______________.
Pistil or Carpel
The process of making RNA from DNA
What is transcription?
Often, some sort of physical barrier (for example, a new mountain range, canyon, or islands) will separate populations of a species, which will adapt to the new environments through natural selection and, over time, become distinct species. What is the term called to describe this process?
Coevolution
Speciation
Mutation
Population Density
Speciation
A relationship where one organism benefits and the other is harmed.
What is parasitism?
The maintenance of constant internal conditions despite changing external conditions
What is Homeostasis?
Under a microscope, a monocot stem can be identified by vascular bundles arranged in this chaotic, unorganized fashion.
What is scattered randomly
Which of the following structural components is found in a molecule of RNA, but is completely absent in a molecule of DNA?
a. A phosphate group
b. Adenine nitrogenous base
c. Deoxyribose sugar
d. Uracil nitrogenous base
d. Uracil nitrogenous base
Certain insects resemble the bark of the trees on which they live. Which statement provides a possible biological explanation for this resemblance?
A. The insects needed camouflage so they developed protective coloration.
B. Natural selection played a role in the development of this protective coloration.
C. The lack of mutations resulted in the protective coloration.
D. The trees caused mutations in the insects that resulted in protective coloration.
B. Natural selection played a role in the development of this protective coloration.
Compare exponential and logistic growth. Which graph would reach carrying capacity? What is carrying capacity?
Exponential growth describes a population that multiplies at a constant rate in an unlimited environment. Because resources are endless, the population grows continuously, producing a rapidly increasing J-shaped curve.
When blood glucose levels rise after a meal, what type of feedback loop regulates it, and what hormones are involved?
This is a negative feedback loop. The pancreas acts as the sensor/integrating center and releases the hormone insulin. Insulin allows cells to absorb glucose from the blood, which successfully lowers the blood sugar levels back to normal.
This vascular tissue acts like a one-way straw, pulling water and minerals upward from the roots.
Answer: What is xylem?
A mutation occurs in a gene, changing a codon from UAC (which codes for Tyrosine) to UAA (which is a Stop codon). What will happen to the protein during translation?
a. The ribosome will ignore the change and substitute a random amino acid to keep going.
b. Translation will terminate prematurely, resulting in a shortened, truncated protein.
c. The protein will become infinitely long because the ribosome cannot find the end of the mRNA.
d. The ribosome will reverse direction and begin translating the mRNA backward.
b. Translation will terminate prematurely, resulting in a shortened, truncated protein.
Vestigial structures can be described as:
a. Structures that had a purpose in an ancestral organism, but not in the evolved organism.
b. Structures that never had a purpose in this or ancestral organisms.
c. Structures that have atrophied in an individual because they have not been used much in their lifetime.
d. Structures that have grown larger in an organism due to overuse.
a. Structures that had a purpose in an ancestral organism, but not in the evolved organism.
One season, there was a shortage of producers in a food web. As a result, the number of deer and wolves decreased. The reason that both the deer and wolf populations declined is that
A. producers are not as important as consumers in a food web
B. more consumers than producers are needed to support the food web
C. organisms in this food web are interdependent
D. populations tend to stay constant in a food web
C. organisms in this food web are interdependent.
Interdependence means that living things in an ecosystem depend on each other for survival. When you alter one part of a food web, a ripple effect flows through the entire system
In order from smallest to largest, name the levels of organization in the human body.
Cell, Tissue, Organ, Organ System, Organism (body)