WorksheetsPractice Two #1-21 Questions
Total questions: 20
Worksheet time: 10mins
In an animal cell, all of the organelles work together to carry out
photosynthesis
diffusion
metabolic processes
information storage
A colony of 47,000 quaking aspen trees, all connected by one root system, is considered to be Earth’s most massive organism. When the trees are stressed, shoots are sent out from the roots and develop into new trees. Every new tree in this colony would contain
the same genetic information, because it is produced asexually
the same genetic information, because it is produced sexually
less genetic material, since it is produced from root cells
a different combination of genes, since it is produced from various roots
Scientists have found that different tissues in the prostate gland, a male reproductive organ, respond to different hormones. The tissues in the center area of the gland respond to testosterone and the tissues in the outer area of the gland respond to estrogen. The cells that make up these two regions of the prostate are different in that
cells in the center area produce more estrogen than cells in the outer area
cells in the outer area have many testosterone receptors
they contain different receptors on their cell membranes
they contain different DNA sequences for the production of hormones
Energy transfers in a natural ecosystem are represented in the diagram below. Which statement about this ecosystem is correct?
A reduction in the number of species present would most likely upset the stability of this ecosystem.
This ecosystem would not be affected if decomposers did not perform their function.
This ecosystem lacks producer organisms.
There are most likely more foxes than rabbits in this ecosystem.
The process of differentiation occurs when
(1) two different cells, a sperm cell and an egg cell, combine to produce a zygote
(2) different zygotes are formed each time that an egg and sperm unite
(3) different kinds of cells and tissues form during embryonic development
(4) two different sexes are present among the offspring, after sexual reproduction
Which two human systems work together to provide glucose for the cells of the body?
nervous and reproductive systems
nervous and respiratory systems
circulatory and digestive systems
circulatory and respiratory systems
The chart below includes structures found in a multicellular organism. Which row contains the structures that would be most numerous?
organs
tissues
organelles
cells
Dioxin, a toxin associated with waste incineration and some plastics, has been found to directly disrupt normal gamete production in human females. Dioxin most likely affects the
testes and progesterone production
ovaries and estrogen production
DNA in the nuclei of sperm cells
pancreas and insulin production
A decrease in predators within an ecosystem would lead to an increase in herbivores. The increase in herbivores would cause a decrease in
decomposers
prey
consumers
producers
The lioness (female lion) and cub shown below have similar characteristics. In order for some of the genetic information in the lioness to be present in the cub, the genetic information from the mother must have been
copied and present in the egg cell of the lioness
combined with genetic information from another lioness
contained in half of the DNA found in the sperm cells of the father
able to make enzymes to produce all of the carbohydrates found in the mother
Which statement best describes a critical function of the placenta?
Meiosis occurs in the placenta, allowing for the development and release of eggs.
Blood from the mother and fetus mixes at the placenta, providing nutrients and oxygen.
The placenta filters out all harmful toxins and chemicals from the mother’s blood, so that they cannot reach the fetus.
The exchange of oxygen and carbon dioxide occurs between the mother and developing fetus across the placenta.
Organisms maintain internal stability in a changing environment. To do this, they make a series of adjustments. The process of making these continual adjustments is referred to as
cellular respiration
active transport
natural selection
dynamic equilibrium
A species of octopus lives in the depths of the ocean where oxygen levels are low. These octopuses have specific proteins in their blood that allow for more efficient oxygen transport than in those that live in surface waters. Which statement best explains the presence of these proteins in the octopuses living deep in the ocean?
Migration to warmer and shallower ocean water favored the formation of the specific proteins.
Octopuses that had the specific proteins were able to survive and reproduce in the deep water environment and passed the trait on to future generations.
When some octopuses migrated to a deeper environment, they needed to produce new proteins so that their blood could carry more oxygen.
Mutations occurred in the body cells of the octopuses, which resulted in the specific proteins being produced and passed on to their offspring.
People with cystic fibrosis have decreased levels of some digestive enzymes in their small intestines. It is essential that they take enzyme supplements in order to prevent malnutrition. These enzymes are an important part of the digestive process because they
break down foods so that nutrients can be absorbed and used
contain vitamins and other nutrients necessary for a healthy diet
allow the person to synthesize large, inorganic nutrient molecules
are the building blocks of carbohydrates and other nutrient molecules
A reproductive cycle is illustrated below. Which statement about this reproductive cycle is correct?
Mutations that occur during processes 1 and 2 will not be passed on to offspring.
Exact copies of the parents are produced, which leads to a stable population.
Sorting and recombining of genes occurs, which leads to new genetic combinations.
The three processes result in offspring with half as much genetic information as the adults.
An energy pyramid for a forest ecosystem is represented below. The four levels (A-D) represent different types of organisms in the ecosystem. Which numbered column in the chart below contains four terms that correctly identify the most likely types of organisms that could be found at each of the four levels in the pyramid?
1
2
3
4
The diagram below shows information about human body temperature regulation. These events can be best described as an example of
a feedback mechanism that maintains homeostasis
a cycle that regulates cellular communication
an immune system response to increasing heart rate
a body system regulating hormone production
The World Wildlife Federation’s recent report indicated that there has been a 60% decline in the size of monitored wildlife populations in just over 40 years. The most likely factor contributing to this decline was
animals reproducing successfully
the destruction of many natural habitats
passing environmental protection laws
the introduction of native species into habitats
An Adirondack Mountain ecosystem is represented below. An abiotic factor in this ecosystem is the
pH of the soil where the trees grow
number of deer of reproductive age
different species of grass present
balance between predators and prey
A partial food chain is represented below. A student observed owls hunting mice in a field. Some chemicals from the waste products of the owls were made available to be absorbed by the roots of the grasses due to the action of
autotrophs
carnivores
herbivores
decomposers
