What conclusion can be drawn from the graph shown?

Use the graph below to answer the last 3 questions. Figure 1-1  shows  the  average  growth  rate  for 38  pairs  of  newborn  rats.   One  of  each  pair  was injected  with  anterior  pituitary  extract.  The  other member of each pair served as a control. At  75  days,  what  was  the  average  weight  of  the rats injected with pituitary extract?

 Based on Figure 1-1, it can be correctly concluded that the pituitary extract...

The  graph  shows  the  relationship  between  the weight of treated and untreated rats and the

 _____ is the study of living organisms.

Which is NOT a rule of Lab Safety

The process by which organisms keep their internal conditions relatively stable is called...

 Which of the following characteristics of living things best explains why some North American birds fly south for the winter?

You notice Ms. Hartman gets really excited about Biology. You say, "she must really care about teaching Biology to her students". That statement is...

A student studied the location of single celled photosynthetic organisms in a lake for a period of several weeks. The depth at which these organisms were found at different times of the day varied greatly. Some of the data collected are shown in the table below. Which of the following statements would be a valid inference based on the data?

An investigation was performed with honeybees to determine the average amount of nectar a bee carried in relation to the distance the flowers were from the hive. The following data was collected: Which inference is best supported by the data collected?

Look at the picture and determine one observation that is both qualitative and quantitative.

What is the name of variable that changes because of the Independent Variable and is measured?

 A company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For its initial study, the company chose 2000 individuals to take one of their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that...

Which of the following statements is true about scientific theories?

A Scientific Law ________________

Scientific Laws are based off of ______________, while Scientific Theories are based off of ________________.

The microscope you are most likely to use in high school and college is...

Which of the following is  not a true statement about compound light microscopes?

Which of the following tools used by biologists would be the best choice for viewing a live bacteria cell?

This is an image of a Tardigrade, also known as a water bear. It is one of the world's most indestructible creatures and is very commonly found in human eyelashes. Don't worry though... this one is dead. What kind of microscope captured this image?

The image shown is bacteria that has been stained to differentiate them from other cells. Which microscope was used to view these bacterial cells?

If you were a scientist and you wanted to see the inside of an algae cell to look at the tiny organelles, which microscope would you choose?

Which of the following is NOT a characteristic of all living things?

Water is considered a(n) ___________ factor in an ecosystem

What is the name of the test subject or group that represents what would have happened had you done nothing in the experiment (baseline)

Which factor in a controlled experiment is deliberately changed?

Which variable is observed for changes in response to the independent variable?

Which of these is considered to be a biotic factor?

An experiment was designed to determine the effect of nitrates on plant growth. Two groups of plants were grown under identical conditions, except one group was watered with a dilute nitrate solution and the other group received water without nitrates. In this investigation, the group of plants grown without added nitrates is known as the...

An experiment was carried out to determine which mouthwash was most effective against bacteria commonly found in the mouth. Four paper discs were each dipped into a different brand of mouthwash. The discs were then placed onto the surface of a culture plate that contained food, moisture, and bacteria commonly found in the mouth. The diagram below shows the growth of bacteria on the plate after 24 hours. Which change in procedure would have improved the experiment?

Researchers notice that animal populations in a wildlife preserve have been decreasing. Which step should the researchers perform to obtain the most valid data about the decreasing animal population?

For her science fair project, Samantha would like to see how different substance affect bone mass. She collects several chicken leg bones from the grocery store, records each bone’s mass, and soaks them in different liquids for 48 hours. After 48 hours Samantha measures the mass of each bone again

In samanthas experiments which of the following should be a constant in all test groups

I. amount of liquid

II. initial mass of the bone

III. temperature of liquid

The diagram below shows two setups used to study bacterial growth. Each setup initially contained an equal number of the bacterium E. coli in different carbohydrate solutions. After one hour, a 1-milliliter sample was drawn from each tube and analyzed. The number of bacteria found in the sample from test tube 1 was higher than the number in the sample from test tube 2. What conclusion regarding this investigation is NOT valid?

A mineral supplement designed to prevent the flu is given to two groups of people during a scientific study. Dosages of the supplement are measured in milligrams per day, as shown in the table below. After 10 weeks, neither group reports a case of the flu. Which action will make the study provide useful data?

Group A : 100

Group B: 200

The current knowledge concerning cells is the result of the investigations and observations of many scientists. The work of these scientists forms a well-accepted body of knowledge about cells. This body of knowledge is an example of which of the following?

A diagram of meiosis I is shown below. At which stage of meiosis I does the exchange in genetic material between homologous chromosomes result in recombinant chromosomes?

What is formed at the end of meiosis?

Billy and Johnny are brothers, but they do not look alike. Which one of the following pairs of factors contributed to this genetic variation?

Sexual reproduction results in unique genetic combinations due to the crossing over of non-sister chromatids. During which stage of the cell cycle does this take place?

While studying meiosis and mitosis for her genetics test, Marisa made notes of the kinds of cells produced from these processes with examples from the body. Which pairing of the cell produced during meiosis and example is correct?

Chromosome pairs that have corresponding traits and match up with each other are called:

During gamete formation, crossing over occurs, which causes genetic information to be exchanged between homologous chromosomes. What is the result of this process of crossing over?

The diagram shows two strawberry plants. Plant 2 is produced asexually from Plant 1. If the leaf cells of Plant 1 have 56 chromosomes, how many chromosomes will be found in the leaf cells of Plant 2?

An organism has gamete cells that contain 8 chromosomes. How many chromosomes would that organism's body cells have?

In meiosis, the haploid number of chromosomes in a human sex cell is:

Manuel is a member of the Science Team at his school. During a competition, he is required to match a process with a description of the process. Which of the following is the correct match of a process and a phrase that describes the process?

Sexual reproduction involves the union of cells from two parents. In terms of natural selection, what is an advantage of sexual reproduction over asexual reproduction?

What are two sources of genetic variation that take place during meiosis?

The skin cell of a pregnant mouse has 40 chromosomes. How many chromosomes would be in the cells of her unborn baby mice?

Reproduction is an important characteristic that all organisms share. Why is it beneficial for a given species to produce gametes and reproduce sexually instead of asexually?

What is the diploid number of cells found in a human body cell?

Meiosis and mitosis are cell processes that involve cell division. Which other statement is true about both meiosis and mitosis?

Mitosis and meiosis differ in a variety of ways. Which of the following is NOT a way in which both processes differ?

During mitosis and meiosis many of the cellular processes are similar. Which of the following statements is true about the daughter cells in meiosis?

Humans produce cells by both mitosis and meiosis. Which of the following is seen in mitosis and meiosis?

An ability to produce fertile offspring is important for the survival of a species. What is one advantage of sexual reproduction over asexual reproduction?

A single somatic cell that divides and produces identical daughter cells with the same number of chromosomes results from which process?

During which part of the cell cycle does DNA replication occur?

One of the main functions of the cell cycle is to produce daughter cells. What characteristics do the daughter cells have after mitosis is complete?

Why do cells divide instead of just growing larger and larger?

Eukaryotic cells undergo cell reproduction through mitosis. Which of the following accurately describes the importance of mitosis for an organism's survival?

A multicellular organism begins life as a single cell—a fertilized egg with a complete set of chromosomes. The picture below shows how the cell divides to become two cells, then four cells, eight cells, and so on. Which of the following statements best describes what happens during this process?

For some single-celled organisms reproduction only occurs asexually. What benefit does an organism gain by only using this method of reproduction?

Look at the diagram below. Which phase of cell division is shown in D?

Why can't we make a vaccine for cancer?

Skin cells form new cells to replace damaged cells. What is the most important outcome of this process?

Students are conducting a lab timing the cell cycle in normal chickens. The average time for normal cells to complete one cycle is 22 hours. What difference would be expected to see in cancer cells?

Which of these steps occurs during mitosis and maintains the chromosome number of an organism?

The diagram below shows a cell undergoing a specific process. Which statement best explains what is occurring in the cell?

To study mitosis in class, Sam observes onion root tips. Why would he choose to observe root tips instead of other plant parts when studying mitosis?

SC.912.L.16.1  A person is heterozygous for a certain trait. What is the expected percent chance the person will produce an allele with a dominant trait after meiosis?

  The diagram below shows a cross between two pea plants that differ in two characteristics: pod shape and pod color. What conclusions can be drawn based on the information in the diagram?

SC.912.L.16.2  What is the name for the offspring between two different homozygous parents?

SC.912.L.16.2   According to the diagram, what is the approximate probability that a human offspring will be female?

SC.912.L.16.1  In rabbits, straight ears (E) are dominant to floppy ears (e). Two rabbits are crossed, and 50% of their offspring have floppy ears. Which cross represents the genotypes of the parents?

SC.912.L.16.1  In certain rats, black fur is dominant over white fur. If two rats that are both heterozygous for fur color are mated, what would their offspring be expected to have?

SC.912.L.16.1  In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?

SC.912.L.16.1  In human genetics, brown eyes (B) are dominant over blue eyes (b). A brown-eyed man is heterogeneous (Bb). He marries a blue-eyed woman. What is the probability of their child having blue eyes?

SC.912.L.16.1  A female is homozygous for a recessive trait (rr), while the male is homozygous dominant for the same trait (RR). What percentage of their offspring would be expected to exhibit the dominant trait?

SC.912.L.16.2 A Punnett square of red (R) and white (r) flower colors is shown below. Which explanation describes how the presence of a white flower color occurred in the offspring?

SC.912.L.16.2 In some cat breeds, short hair (H) is dominant to long hair (h). A homozygous male cat with short hair and a long-haired female cat produce offspring. Which percentage of the offspring is predicted to have short hair?

SC.912.L.16.2 Gregor Mendel studied the inheritance pattern of several characteristics in pea plants. He observed that tall (T) plants were dominant to short (t) plants. If a heterozygous tall plant is crossed with a short plant, what percentage of the offspring will be short?

SC.912.L.16.1 This diagram shows a diploid cell with two pairs of homologous chromosomes. Due to independent assortment, what is the possible genetic make-up of gametes produced by this organism?

SC.912.L.16.1 Gregor Mendel tested to see if inherited traits were passed from one generation to another as a group or individually. The Punnett square below illustrates the results of these tests and is an exmaple of which law of genetics?

SC.912.L.16.1 In sheep, producing white wool (W) is dominant to black wool (w), and having brown eyes (E) is dominant to blue eyes (e). A cross of two heterozygous sheep is shown in the Punnett square below. Which of the following describes an outcome of this cross?

SC.912.L.16.1 When a plant with red flowers (CRCR) is crossed with a plant that has white flowers (CwCw), the resulting offspring has pink flowers (CRCw ). What mode of inheritance is observed?

SC.912.L.16.2 The table below lists human blood group genotypes and phenotypes. Why is the AB phenotype a result of codominance?

SC.912.16.1 The genetic makeup of an individual, including the exact versions of each gene they carry, is called the genotype. A black chicken mates with a white chicken and has a black-and-white speckled chicken. Which of the following must be true regarding the genotype that codes for feather color?

SC.912.L.16.2 Coat color in cats is inherited by X-linked genes, with alleles for black and orange-brown. The alleles and phenotypes are as given below.

A cross between an orange-brown male and a homozygous black female produce four kittens. What is the phenotypic probability of the offspring?

SC.912.L.16.2 A man with red-green color blindness (X' Y), a recessive sex-linked trait, has a child with a woman that is homozygous dominant (X X). What is the probability that a child produced from this couple will have red-green color blindness?

SC.912.L.16.2 An X-linked allele is an allele that is carried on the X-chromosome. Which statement best describes the inheritance of a recessive X-linked allele?

SC.912.L.16.2 Red-green color blindness is an X-linked recessive trait in humans. A colorblind woman and a man with normal vision have a son. What is the probability that the son is color blind?

SC.912.L.16.4 A mutation in the code for a trait may not always change the expression of that trait. What advantage does this provide cells?

SC.912.L.16.4 All living things share the same 20 amino acids responsible for making proteins. Proteins made according to the original DNA of a cell give cells structural support, reaction catalysts and transport functions.

There are 2 mRNA strands listed below. Use the genetic code to determine what changes, if any, occur in amino acids because of the mutation.

Original: A U G A G G C U G U C A U C A

Mutated: A U G A G G C U U U C A A G G

SC.912.L.16.4 Which statement best describes a chromosomal alteration?

SC.912.L.16.4 A single mutation caused the ears of a cat to curl backwards, as shown in the image below. Which statement about this mutation can be inferred using only data from the image?

SC.912.L.16.4 A trait is observed in an offspring that is NOT present in the parents. In which process could a mutation occur that would cause a change in the phenotype in the offspring that was NOT present in the parents?

In the 1600s, Francesco Redi was the first scientist to try to disprove spontaneous generation, the belief that living things can come from non-living things. Louis Pasteur, in 1859, finally disproved a centuries old belief in the origin of living things. Which is the best statement that can be made about scientific theories?

Scientists design experiments which follow the scientific process then create a theoretical model based on the experimental results. For the model to be accepted by the scientific community and considered a theory, what are the series of events which need to occur?

Scientists have made many observations about cells. Three of these observations are listed below. Which of these was developed after scientists analyzed these observations?

If new experimental findings contradict a scientific theory, what might happen to the theory?

Which requirement must be met in order for a scientific statement to be accepted as a theory?

Which of the following bonds are formed by the sharing of valence electrons in the outer shells of two or more atoms?

If an atom, such as Oxygen, has a valence of 6, how many electrons would it be looking to accept from other atoms to make it "happy"?

Generally speaking, a molecule is considered to be organic if it contains what element?

The four classifications of biomolecules include:

SC.912.L.18.12 The diagram below shows a water molecule.  What makes water a good solvent?

PSC.912.L.18.12 Water sticks very well to many materials. Which term relates to this property of water?

SC.912.L.18.12 The cohesive and adhesive properties of water molecules are due to ______________ bonds between water molecules.

SC.912.L.18.12 This property of water enables water molecules to stick to each other creating surface tension

SC.912.L.18.12 A stalk of celery is placed into a beaker of colored water.  After a few minutes , the colored water has moved up into the celery stalk’s tubes.  What statement below best describes this result

SC.912.L.18.12 Fish are able to remain alive during extremely cold winters when ice forms on top of lakes is an example of which property of water

SC.912.L.18.12 Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?

Enzymes are biological catalysts which

letter b in the picture is

SC.912.L.18.11 A digestive enzyme that is released into the small intestines by the pancreas is used to break down proteins. Data from a chemical reaction with the digestive enzyme are shown in the graph below.

SC.912.L.18.12 Water is one of the most powerful natural solvents known. For instance, salt, sugar, glucose, and nitrates all dissolve readily in water. The solvent property of water is vital for life because many biochemical reactions take place only within aqueous solutions. What is another reason why the solvent property of water is important to life?

SC.912.L.18.12 This property of water allows water molecules to stick to everything else. For example - steam sticking to the mirror after a shower.

SC.912.L.18.12 One unique property of water is its high surface tension. Which of the following biological functions is facilitated by water's high surface tension?

Nearly all enzymes are classified as this biomolecule which is made of monomers called amino acids

SC.912.L.18.11 Sophia produces the graph shown below during a biology class investigation. What could she infer about the probable difference between the original reaction and Reaction B, based on the data?