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Help in biology??

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Question 9 2 points Save

Acid rain is caused by ___________ and results in ____________.

Question 9 answers

chlorofluorocarbons from refrigerators; a decrease in the ozone layer.

hydrochloric acid from power plants; "bleaching" lakes and trees.

carbon dioxide air pollution; global warming increasing the sea levels.

sulfur pollution combining with water vapor; damage to ecosystems.

Question 10 text Question 10 2 points Save

Ozone depletion in the atmosphere

Question 10 answers

leads to the formation of acid precipitation.

leads to a rise in chlorofluorocarbons.

allows more harmful radiation from the sun to reach the earth.

both b and c.

Question 11 text Question 11 2 points Save

Solar energy can be trapped in the atmosphere by

Question 11 answers

the chemical bonds of carbon dioxide.

the chemical bonds of ozone.

radiation.

sunlight.

Question 12 text Question 12 2 points Save

Which of the following is NOT an effect of chemical pollutants on the environment?

Question 12 answers

overconsumption of resources

biological magnification

loss of localized species diversity

thin, fragile eggshells of predatory birds

Question 13 text Question 13 2 points Save

Which of the following groups represent nonrenewable resources?

Question 13 answers

ecosystems, habitats, living species

topsoil, ground water, biomes

ground water, extinct species, topsoil

topsoil, ecosystems, biomes

Question 14 text Question 14 2 points Save

All of the following are important environmental problems that must be solved EXCEPT

Question 14 answers

increasing levels of ocean pollution.

dependence on fossil fuels.

rapid population growth.

coastal devastation by hurricanes.

Question 15 text Question 15 2 points Save

Which of the following are NOT used to classify kingdoms of organisms?

Question 15 answers

complexity of the organism

invertebrate or vertebrate

method of obtaining nutrition

type of cell that makes up the organism

Question 16 text Question 16 2 points Save

Which of the following are NOT protists?

Question 16 answers

fungi

algae

slime molds

diatoms

Question 17 text Question 17 2 points Save

The process by which cells become specialized in form and function is called

Question 17 answers

colonization.

aggregation.

collection.

differentiation.

Question 18 text Question 18 2 points Save

Levels of cellular organization that occur in plants and animals are

Question 18 answers

family, genus, species.

tissues, organs, organ systems.

colonial, aggregation, differentiation.

niche, habitat, ecosystem.

Question 19 text Question 19 2 points Save

Which is NOT a general characteristic of plants?

Question 19 answers

use oxygen to make usable energy

primary producers

have specialized cells

cell walls composed of cellulose

Question 20 text Question 20 2 points Save

Which of the following are characteristics of all animals?

Question 20 answers

multicellular, haploid cells that divide by mitosis, organisms with organ systems

multistage zygote development, vertebrates, reproduce sexually

99 percent invertebrates, heterotrophs, multicellular

both a and c.

Question 21 text Question 21 2 points Save

A group of specialized cells that transport fluids and nutrients is called

Question 21 answers

a multicellular autotroph.

a methanogen.

an aggregation.

vascular tissue.

Question 22 text Question 22 2 points Save

Which is an INCORRECT statement about the differences between invertebrates and vertebrates?

Question 22 answers

Most animals are not vertebrates; they are invertebrates.

Vertebrates have a backbone and spinal column while invertebrates do not have a backbone and spinal column.

Invertebrates do not have internal organs while vertebrates do have internal organs.

Vertebrates have a brain encased in a head while invertebrates do not have a brain encased in a head.

Question 23 text Question 23 2 points Save

A typical virus consists of a

Question 23 answers

protein coat and a cytoplasm core.

carbohydrate coat and a nucleic acid core.

protein coat and a nucleic acid core.

polysaccharide coat and a protein core.

Question 24 text Question 24 2 points Save

During initial HIV infection, the HIV virus attaches to CD4 receptors on a macrophage and then

Question 24 answers

attaches to a CCR5 receptor before it is able to enter the cell.

enters the cell through the CD4 receptors.

attaches to a lymphocyte that attempts to fight the virus on the macrophage.

HIV tricks the reverse transcriptase of the infected cell into making copies of the viral RNA molecule.

Question 25 text Question 25 2 points Save

Bacteria and eukaryotes share the characteristic of

Question 25 answers

multicellularity.

a cell nucleus.

a cell membrane.

all of the above.

Question 26 text Question 26 2 points Save

Two ways that bacteria cause disease are

Question 26 answers

toxins are released that break down and absorb host organic nutrients enzymes or enzymes are excreted that poison the host.

enzymes are released that break down and absorb host organic nutrients or toxins are excreted that poison the host.

enzymes are released that break down and absorb inorganic nutrients or toxins are excreted that poison the host.

through the lytic and lysogenic cycles.

Question 27 text Question 27 2 points Save

HIV is spread through the body

Question 27 answers

after it replicates and leaves the macrophage by rupturing it.

by taking over the host macrophage's DNA and directing it to attack other cells.

by budding from the macrophage and enveloping itself with the host's cell membrane.

by attaching the lymphocyte's CCR5 receptors to itself which fools other lymphocytes.

Question 28 text Question 28 2 points Save

Which is NOT a human benefit of bacteria?

Question 28 answers

combat viral infections

clean the environment

make food

fix nitrogen

Question 29 text Question 29 2 points Save

Which kingdom of eukaryotes exhibits the broadest range of characteristics?

Question 29 answers

Animalia

Protista

Plantae

Eubacteria

Question 30 text Question 30 2 points Save

What is one environmental requirement of most protists?

Question 30 answers

water

sunlight

oxygen

warmth

Question 31 text Question 31 2 points Save

Which of the following is NOT a unifying feature of protists?

Question 31 answers

They do not develop complex multicellular reproductive structures.

They are eukaryotes that cannot be classified as animals, plants, or fungi.

They do not reproduce by forming embryos.

They are prokaryotic and have no nucleus to enclose their DNA.

Question 32 text Question 32 2 points Save

When Chlamydomonas reproduce sexually, it divides by mitosis, producing

Question 32 answers

zygospores.

sporophyte.

haploid gametes.

diploid gametes.

Question 33 text Question 33 2 points Save

In addition to causing disease, protists also affect humans through

Question 33 answers

their role in the nitrogen cycle.

their antibiotic properties.

their ability to clean up oil spills.

all of the above.