Biology regents: 9th grade
Deforestation most directly results in
A decrease in biodiversity in an area
A dead or weakened pathogen used to establish immunity would most likely be found in
A vaccine
The process used to remove excess water from the paramecium by the contractile vacuole is
Active transport
The hormone adrenaline can affect only cells with
Appropriately shaped receptors
In living cells, chemical processes, such as synthesis all require the action of
Biological catalysts
after a zygote is formed, specialization if cells occurs. Through which process do the cells of a zygote become specialized?
Differentiation
Three human hormones most directly involved in sexual reproduction are
Estrogen, progesterone, and testosterone
Nonrenewable resources are
Finite and are depleted over time
The shape of a protein molecule directly determines its
Functions inside and outside of cells
A serious threat to biodiversity is
Habitat destruction
What are the four most abundant elements in all living things
Hydrogen, oxygen, carbon, and nitrogen
What cell structure is responsible for releasing energy from food molecules in some single-celled organisms?
Mitochondrion
Which sequence represents structures organized from least complex to most complex?
Nucleus— nerve cell— brain— nervous system
An ameba, a one called organism, can move, ingest, and transport materials within the cell, because it has
Organelles
The substance produced inside the leaf disks that caused them to float to the surface of the solution is
Oxygen
Which factor would be least likely to contribute to the developement of a new species?
Plentiful resources within the environment occupied by the species
In humans, the placenta is essential to the embryo for
Respiration, nutrition, and excretion
The building blocks for this molecule are
Simple sugars
Which occurrence represents an example of evolution?
Some antibiotics are almost useless, because pathogens have developed a resistance to these antibiotics
