This diagram shows a diploid cell with two pairs of homologous chromosomes. Due to independent assortment, what is the possible genetic make-up of gametes produced by this organism?
A) SsTt
B) Ss, Tt
C) S, s, T, t
D) ST, St, sT, st
When worker bees return to the hive, they perform a sequence of movements called a waggle dance to show other members of the colony where food is located. Which type of behavior does this best illustrate?
A aggressive behavior
B courtship behavior
C social behavior
D territorial behavior
Which process is an example of asexual reproduction?
A An amoeba divides in half to form two amoebas.
B a Bee transfer pollen from one flower to another
C
D earthworms exchange sperm
Which genetic abnormality can be identified through karyotyping?
A point mutation
B recessive allele
C extra chromosome
D sex-linked allele
Which structure in the leaf controls the opening and closing of the stoma?
A cuticle
B epidermis
C guard cell
D spongy mesophyll
Which kingdoms have photosynthetic organisms?
A fungi and plants
B fungi and protists
C protists and plants
D plants and animals
Which sequence shows increasing ecological levels of organization?
A organism, population, community, ecosystem
B ecosystem, population, organism, community
C community, ecosystem, population, organism
D population, organism, ecosystem, community
This graph represents changes in human population over a period of 2,000 years.
What can be concluded from the graph?
A Human population grew at a constant rate over the last 2,000 years.
B Human population grew exponentially over the past 200 years.
C Human population reached its carrying capacity around the year 1900.
D Human populations will begin to level out around 2010.
Some birds live in close association with horses. These birds feed on insects that are parasites to horses. Which type of relationship between the horses and these birds does this illustrate?
A commensalism
B mutualism
C parasitism
D predation
This diagram shows the flow of carbon in a terrestrial ecosystem. Which will most likely happen if the decomposers are removed from the carbon cycle?
A The amount of carbon dioxide the atmosphere will increase.
B The amount of carbon dioxide in the atmosphere will decrease.
C The amount of carbon dioxide used by producers will increase.
D The amount of carbon dioxide needed by consumers will decrease
