WorksheetsEOC Practice 1
Total questions: 20
Worksheet time: 28mins
Due to Mendel's law of segregation
homologous chromosomes pair up and cross over during prophase 1 of meiosis
alleles belonging to the same gene will never end up in the same gamete during mitosis
alleles belonging to the same gene will never end up in the same gamete during meiosis
genes located on non-homologous chromosomes sort independently of one another during the formation of gametes
The mouse population of an area decreased last year. Which abiotic factor would explain the population decrease?
a decrease in rainfall
a fatal bacterial disease
an increase in owl population
competition among the mice for food
Which organism has fur and mammary glands, but does NOT have opposable thumbs?
the lizard
the salmon
the hamster
the chimpanzee
In a typical body of fresh water there exists a diversity of aquatic animal species. Consider the following scenario. A freshwater lake, pH of the water ranging between 5.5 and 6.5, falls prey to acid rain. Over several decades the pH of the lake water declines to 4.5. What are the consequences of such a change on the aquatic animal populations? Choose ALL that apply.
While species may fluctuate, the number of animals remains constant.
Decrease in one species is compensated for by an increase in another species.
According to the graph of pH sensitivity, biodiversity of animal species will decrease.
Invasive species will migrate into the lake habitat to replace those species that die off.
Because pH tolerance varies, only species with a tolerance level 4.5 and below will survive.
Which statement is true for asexual reproduction?
Genetic information from two parents is copied and passed on to form offspring with new genetic information.
Genetic information from a single parent is copied and passed on to form offspring with new genetic information.
Genetic information from two parents is copied and passed on to form offspring with identical genetic information.
Genetic information from a single parent is copied and passed on to form offspring with the same genetic information.
The graph illustrates the relative activity levels of three common digestive enzymes, where 0 represents no activity and 12 represents the highest level of activity. Which enzyme is most active at a neutral pH of 7?
pepsin
trypsin
amylase
pepsin and amylase
This picture shows a food web for a forest ecosystem. Evaluate each of the choices and select ALL of those that include ONLY secondary consumers.
hawks, owls, foxes
rabbits, foxes, spiders
spiders, predaceous insects, foxes
insectivorous birds, hawks, spiders
herbivorous insects, mice, squirrels
The graph here shows a generalized population of deer on a plateau. The primary food source for these deer is grasses on the plateau. The area has been cleared of natural predators to the deer. Which statement BEST explains what happens after point B on the graph?
In the absence of natural predators, the deer had an increase in grasses upon which they grazed, causing an increase in natural deer population.
Deer from other nearby plateaus migrated into the area, allowing the deer to survive above their carrying capacity (K) for extended periods of time.
The humans in the area implemented a successful breeding program for the deer than increased their population numbers, which stabilized after point B.
In the absence of natural predators, the deer overgrazed on their grasses, leading to an overshoot and die off in the population when they exceeded carrying capacity.
To maintain turgor pressure, cells in both the leaves and stems of most non-woody or herbaceous plants contain
chloroplasts.
starch granules.
many mitochondria.
a large central vacuole.
What will be the effect of placing a plant cell in a hypotonic solution?
The plant will wilt.
The cell will shrink in size.
The cell will remain unaffected.
The cell will expand and become turgid.
Wildlife is plentiful in the pineywoods. There are over 100 species of birds and many small mammals, like cottontail rabbits and squirrels.
What else MUST be included in the pineywoods habitat to keep populations in balance?
predators, like snakes
omnivores, like raccoon
more producers, like plants
small animals, like the opossum
Many species of organisms are found only on islands. Lemurs are found only on Madagascar and koalas only on Australia. Which factor contributes MOST to this situation?
small land area
fewer predators
genetic isolation
limited food variety
In the fossil record, there are many species that have remained unchanged. In all geological strata in which they appear, they are encountered unaltered. The lungfish, starfish, and trilobites are lineages which have experienced long periods of ____________.
equal
stasis
evolution
punctuated equilibrium
When two solvents are separated by a semi-permeable membrane, water flows from low solute concentrations to high solute concentrations. What would happen if external pressure is applied to the solution with higher solute concentration?
The semi-permeable membrane will lose its activity.
Water will stop flowing across the semi-permeable membrane.
Water will flow more freely across the semi-permeable membrane.
The concentration of solute will become equal on both sides of the membrane.
Given the sequence of DNA nucleotide bases TAGTAGTAG, give the complementary strand of mRNA produced during transcription.
AAGGUAGUA
AAUCGGAAC
AUCAUCAUC
GAGGAGGAG
In the energy pyramid, the greatest biomass appears at the level of
Birds and Mammals.
Insects and Zooplankton.
Phytoplankton
Small Fish and other Aquatic Species
Acid rain throughout the northeast United States has lowered the pH of many ponds and lakes. The lowered pH will eventually result in the death of many aquatic animals. The table shows the pH tolerance levels for water that supports a variety of nine animal species.
What is the mathematical range of the minimum pH levels that supports life for the nine species?
2.5
4.5
5.5
7
Habitat ____________ splits ecosystems into pieces and makes populations more vulnerable to disturbances or climate change.
diversification
extinction
fragmentation
unification
A common ancestor is evident when comparing __________________ of different species in the phylum Chordata, especially in the early stages.
embryos
fossils
motility
protein structure
Using the product rule of probability, calculate the odds of getting an individual that receives the bb genotype and therefore shows the recessive trait, white flowers.
1/4 X 1/4 = 1/16
1/2 X 1/2 = 1/4
1/4 + 1/4 = 1/2
3 X 1/4 = 3/4; 1 - 3/4 = 1/4
