mrs. powell's crct review powerpoint

CRCT Review:

CRCT Review

Which organism in the food web acts as the producer?:

Which organism in the food web acts as the producer? Rabbit

Answer :

Answer Grass

What is the source of each organism’s energy?:

What is the source of each organism’s energy? Rabbit

Answer:

Answer Mountain lion gets its energy by feeding on rabbits and deer Rabbits and deer feed on grass The snake gets its energy by feeding on rabbits and mice Mice get energy by eating grass

Which food might a first-level consumer eat?:

Which food might a first-level consumer eat? A. Fish B. Bacteria C. Corn D. Worms

Answer:

Answer First level consumers feed on plants so it must be choice that describes a plant. Answer C is correct

An organism found in an ecosystem breaks down dead plants and animals. In the process, it releases carbon dioxide into the atmosphere. This organism is most likely a :

An organism found in an ecosystem breaks down dead plants and animals. In the process, it releases carbon dioxide into the atmosphere. This organism is most likely a A. Producer B. Consumer C. Carnivore D. Decomposer

Answer:

Answer Decomposer

Which process removes carbon from the atmosphere?:

Which process removes carbon from the atmosphere? A. Combustion B. Respiration C. photosynthesis D. volcanic eruption

Answer:

Answer Photosynthesis- plants remove carbon and two molecules of oxygen from the atmosphere to produce sugar. CO 2 + H 2 0 sunlight C 6 H 12 0 6 + 0 2 + water vapor

Interdependence Continued :

Interdependence Continued What does the sun supply to an ecosystem? A. Carbon-dioxide B. Oxygen C. Energy D. Bacteria

Answer :

Answer C Energy- the energy from the sun makes life possible on this planet. The sun maintains temperatures so that people can survive as well as makes it possible for photosynthesis to take place.

In an ecosystem plants use the sun’s energy to :

In an ecosystem plants use the sun’s energy to A. Make sugars B. Create more energy C. release decomposers D. create carbon and nitrogen

Answer :

Answer A – make sugars

About how much energy is passed on to each successive trophic level in an ecosystem?:

About how much energy is passed on to each successive trophic level in an ecosystem? A. 10% B. 25% C. 50% D. 100%

Answer:

Answer A- 10% is the correct answer, recall the energy pyramid that we have discussed in class

Vampire bats generally live in dark caves, hollows of trees or attics of abandoned buildings. At night, they feed on the blood of other mammals. What is the ultimate source of energy for vampire bats? :

Vampire bats generally live in dark caves, hollows of trees or attics of abandoned buildings. At night, they feed on the blood of other mammals. What is the ultimate source of energy for vampire bats? A. Moonlight B. Insects C. Sunlight D. Blood

Answer:

Answer The correct answer is D. Blood

Which set of organisms in this energy pyramid has the greatest amount of available energy?:

Which set of organisms in this energy pyramid has the greatest amount of available energy?

Answer:

Answer D- Zooplankton Which are small protists we have studied this year remember they are heterotrophic an example of a zooplankton are Dinoflagellates

Relationships:

Relationships Spanish moss grows on the branches of oak trees. The moss benefits from being up high and the tree is neither helped nor harmed. What type of relationship exists between these organisms? A. Mutualism B. Parasitism C. Competition D. Commensalism

Answer:

Answer D- Commensalism Mutualism - a relationship where both animals benefit Parasitism - one animal is using another and harming it Competition - the struggle between organisms that attempt to use the same limited resources Commensalism - relationship between organisms in which only one animal benefits but isn’t hurting or helping the other it in any way.

Where do rivers begin? :

Where do rivers begin? A. In estuaries B. In ocean inlets C. In marshes D. In mountain streams

Answer-D :

Answer-D Estuaries- Estuaries are bodies of water along our coasts that are formed when fresh water from rivers flows into and mixes with salt water from the ocean Ocean inlets- take a look at the picture to the right Marshes- A marsh is a type of wetland which is distinguished from other wetland varieties by having an assortment of grasses D-- Mountain streams - When one stream meets another and they merge together, the smaller stream is known as a tributary. It takes many tributary streams to form a river .

A student is studying osmosis, by making a model using filter paper to represent the cell membrane. He then mixes solutions of sugar and water. In each case, he keeps the concentration of the solution outside the membrane the same and changes the concentration of the solution inside the membrane. He then observes the direction and flow of water through the membrane, if it flows at all. What is the independent variable in this experiment?:

A student is studying osmosis, by making a model using filter paper to represent the cell membrane. He then mixes solutions of sugar and water. In each case, he keeps the concentration of the solution outside the membrane the same and changes the concentration of the solution inside the membrane. He then observes the direction and flow of water through the membrane, if it flows at all. What is the independent variable in this experiment? A. The type of filter paper used B. The direction in which the water flows through the membrane C. The concentration of sugar in the solution outside the membrane D. The concentration of sugar in the solution inside the membrane

Answer :

Answer Think about the definitions of independent and dependent variables. An independent variable is the part of the experiment that is purposely changed, while the dependent variable reacts or responds to that change. So the independent variable would have to be D- the concentration of sugar in the solution inside the membrane

Scientific investigation:

Scientific investigation A pan balance or a triple beam balance is used to measure which of the following A. Temperature in Kelvin B. Mass in kilometers C. Force in Newtons D. Mass in Kilogram

Answer:

Answer D. Mass in Kilogram Remember this….. Quantity Base Unit Tool Length Meter Meter stick Mass Kilogram Triple beam balance or pan balance Temperature Kelvin- absolute zero thermometer Add 273 degrees to Any Celsius quantity to covert to Kelvin Time Second Stopwatch

How many meters are there in 2 hectometers? :

How many meters are there in 2 hectometers? A. 2,000 meters B. 200 meters C. 20 meters D. 100 meters Remember K ing H ector D ied d rinking C hocolate M ilk- which helps you remember the SI units K ilo, H ecto, D eca, D eci, C enti-, M illi-

Answer:

Answer B. 200 meters How to gauge this measurement 200 meters is a little less than 2 football fields

Converting into Kelvin:

Converting into Kelvin The boiling point of ethyl alcohol is 78.5 degrees Celsius, what would this temperature be in Kelvins?

Answer:

Answer About 351 Kelvin or 351.65 to be exact.

Which two kingdoms are made up of prokaryotes?:

Which two kingdoms are made up of prokaryotes? A. Fungi and Plants B. Animals and Eubacteria C. Plants and Protists D. Archaebacteria and Fungi E. Archaebacteria and Eubacteria

Answer E:

Answer E E. Archae and Eubacteria Recall that archaebacteria are “ancient bacteria that existed on Earth for billions of years. Scientists believe they are Earth’s earliest life forms. These early life forms have not evolved to have a nucleus. Bacteria and Archaea are similar because they are both unicellular and both are prokaryotic meaning they don’t have nuclei. Prokaryotic means “ pre-nucleus ”

Which kingdoms have cell wall? :

Which kingdoms have cell wall? A. Protists and Eubacteria B. Fungi and Plants C. Plants and Archebacteria D. Animals and Protists

Answer:

Answer B. Fungi and Plants Fungi- multicellular, eukaryotes, heterotrophs Plants- multicellular, eukaryotes, autotrophs Both have cell walls I know some plantlike protists have cell walls but not all of them do so this is why protists is not the best answer

Slide 38:

Kingdom Archaea Eubacteria Protists Fungi Plants Animals unicellular X X X multicellular X X X X Nucleus - Eukaryote X X X X No Nucleus Prokaryote X X Cell wall X X X X Cell membrane X X X X X X Asexual Reproduction Binary Fission Binary Fission X Budding X Sexual Reproduction Conjugation Conjugation Spore Pollen gametes Chloroplasts X X X Autotrophs X X X X Heterotrophs X X X X X

READ each statement and decide which statements are true and which are false.:

READ each statement and decide which statements are true and which are false. A. Mitosis is used to create 2 identical daughter cells, while meiosis is used to create 4 identical daughter cells. B. Mitosis is used to create skin cells and meiosis is used to create gametes or sex cells that lead to a new life. C. Both mitosis and meiosis have the following phases in common Prophase, metaphase, Anaphase, Telophase, but these phases occur twice during meiosis. D. The reason cells undergo meiosis is to reduce the number of chromosomes to one half and reason cells under go mitosis is to create identical cells which have the same number of chromosomes as the parent.

During Meiosis a cell ends up with half the number of Chromosomes, this only happens to gametes= eggs or sperm. This creates diversity!:

During Meiosis a cell ends up with half the number of Chromosomes, this only happens to gametes= eggs or sperm. This creates diversity!

Answers A- False B. True C. True D. True…explanations below:

Answers A- False B. True C. True D. True…explanations below A. False -- Mitosis is used to create 2 identical daughter cells, BUT meiosis is used to create 4 daughter cells that are not identical. If the cells were identical you and your siblings would all look the exact same. B. True- - Mitosis is used to create skin cells and hair and nails these cells are identical you want all of theses cells to look the same. Meiosis is used to create gametes or sex cells each time meiosis occurs you end up with 4 egg cells or 4 sperm cells. C. True- - Both mitosis and meiosis have the same phases but there are more steps in meiosis because each phase occurs twice. (For more detail see the next slide on Meiosis D. True- - The reason cells undergo meiosis is to reduce the number of chromosomes to one half but the reason cells undergo mitosis is to create identical cells which have the same number of chromosomes as the parent.

What goes on during Mitosis?:

What goes on during Mitosis? Steps Interphase- copy of DNA is made Prophase- Chromatin condenses to form Chromosomes and Spindle fibers form Metaphase- Chromosomes line up down the middle of the cell Anaphase- The centromeres split and move to away to opposite sides of the cell Telophase Nuclear membrane forms around each region of chromosomes Cytokinesis- Completely separate

What happens during Meiosis? :

What happens during Meiosis? C- Interphase D Prophase 1 E Metaphase 1 F Anaphase 1 G Telophase 1 Cytokinesis H Prophase 2 I Metaphase 2 J Anaphase 2 K Telophase 2 L Cytokinesis

Which Biome covers most of North America? :

Which Biome covers most of North America? A. Tundra B. Temperate Forest C. Rain Forest D. Grassland F. Dessert

Answer- B is the correct answer:

Answer- B is the correct answer The Temperate Deciduous Forest covers most of North America. Visit the site below to see Biome maps of world. http://fp.bio.utk.edu/botany120lect/Biomes/biomemap.htm

Which biome (s) gets less than 25 cm of precipitation?:

Which biome (s) gets less than 25 cm of precipitation? A. Tundra B. Tropical rain forest C. Savanna D. Temperate deciduous forest E. Desert

Answer- A and E:

Answer- A and E Both the Tundra and the desert get less than 25 cm of precipitation a year.

A major factor used to classify biomes is:

A major factor used to classify biomes is A. The climate in the region B. The sources of water present C. The surface area in the region D. The number of people that live there

Answer –A :

Answer –A A biome is characterized by the climate and the types of organisms that live in it.

Two populations with limited resources experience:

Two populations with limited resources experience A. Commensalism B. Competition C. Predation D. parasitism

Answer B:

Answer B When more than one population needs a particular resource this is called competition.

How did the tuna population change between 1970-1994? Can you suggest a possible reason for this change?:

How did the tuna population change between 1970-1994? Can you suggest a possible reason for this change? Year Western Atlantic Bluefin tuna Population 1970 240,000 1975 190,000 1980 90,000 1985 60,000 1990 45,000 1994 60,000

Answer:

Answer The tuna population declined steadily from 1970 to 1990, then increased from 1990 to 1994. The decline was probably due to over fishing of tuna; the rebound may have resulted from limits on tuna fishing

All of the squirrels living at Creekland represent what level of ecological organization? :

All of the squirrels living at Creekland represent what level of ecological organization? A. An organism B. An ecosystem C. A community D. A population

Answer – D a population:

Answer – D a population A population is all of the members of a species living in the same area. An organism- a single member of the population A community would be all of the different populations that live together in an area An ecosystem- the community and all of the abiotic factors together form an ecosystem

Most living things require oxygen, but other than oxygen what other two abiotic factors are most important to all organisms?:

Most living things require oxygen, but other than oxygen what other two abiotic factors are most important to all organisms? A. Wind and soil B. Temperature and wind C. Sunlight and water D. Water and temperature

Answer- C. Sunlight and water :

Answer- C. Sunlight and water

Which 2 kingdoms do not require any oxygen?:

Which 2 kingdoms do not require any oxygen? A. Eubacteria B. Protists C. Archaea D. Plants E. Dinoflagellates F. Animals G. Insects

Answer:

Answer C . Archaea and D. Plants Archaea, live in extreme places that’s why they are called extremophiles. They love hot springs (thermophile) Yellow Stone Nat’l Park They love salty places (halophile) like the Dead Sea. They love highly acidic places (acidophile) They love pressure, extremely high pressure such as the depths of the ocean floor, some even live in high radiation areas! Although plants give off oxygen as a waste product during photosynthesis it is not a requirement it is simply a waste product. See the formula below 6 CO 2 + 6 H 2 O → C 6 H 12 O 6 + 6 O 2 Carbon dioxide +Water Light energy Glucose + Oxygen Raw Materials Products

What is Life?:

What is Life? All living things have the following things in common: Cellular organization Similar chemicals Use energy Grow and develop Respond to surroundings Can reproduce

More on DNA:

More on DNA DNA is the main component in chromosomes. Deoxyribonucleic Acid is made up of four nitrogen bases A- adenine T-thymine G-Guanine C-Cytosine The order of the nitrogen bases along a gene forms a genetic code that tells the cell what protein to produce.