bio ecot question test

the lack of genetic variability among clones puts the whole species at increased risk of extinction through a catastrophic disease or pest

...Why are scientists warning that exclusively growing this mutant type by asexual reproduction presents a serious disadvantage?

structural changes of hemoglobin affect its ability to carry oxygen, indicating that the shape of a protein is important to its function

hemoglobin is a protein found in the red blood cells of vertebrates and in the plasma of many invertebrates..... Which argument is supported by this information?

the chromosomes in cell 1 are the same as in cells 6 and 7

students modeled the changes in cells during mitosis, using paper plates, flat wooden sticks, cotton swabs, and construction paper.

cell wall

the central vacuole in a plant cell is responsible for turgor pressure. When the vacuole loses water, the cytoplasm shrinks. When the vacuole gains water, the cytoplasm seems to swell up. One structure helps the plant cell keep its shape no matter how much force water is creating in the vacuole. This is the-

a NONDISJUNCTION mutation was caused by the improper separation of the genetic material during meiosis, allowing the gamete of one parent to donate 2 copies of chromosome 18 to the child.

A male and female have a child that has 3 copies of chromosome 18. Although both parents are unaffected, their doctor claims that the disorder associated with having and extra chromosome 18 is the result of a chromosomal mutation in cells that carry inherited material. Which argument supports this claim?

*hypotonic right hypertonic

A student is performing an investigation using 2 solutions. The solution in the dialysis bag has a lower solute concentration in moles per liter (M) than the solution in the beaker.

sister chromatids separated and pulled to opposite poles

All but one of these occur during metaphase 1 of meiosis. Which of these would not occur during the metaphase 1 phase of meiosis?

water

Consider the bar graph comparing the number of frogs in 4 different habitats. Based on the information above about frogs, what is the MOST LIKELY factor limiting the frog population?

Yes. The pollen DNA matches the pollen found at site c

DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. A DNA sample taken from a crime scene is compared with a DNA sample from a suspect. DNA evidence may also be used to analyze the crime scene in general.

*Beaker 4: diffusion spreads

Diagram 1 represents a sugar cube being dropped into an undisturbed beaker of water at room temperature. One sugar molecule is labeled. Which diagram above represents the distribution of sugar molecules in the water a day later?

little or no light present

Euglena are single-celled organisms. Depending on the physical conditions present in their aquatic environment, Euglena can act as either producers or consumers. Euglena will most likely act as consumers when placed in an environment that has

Specialization occurs, resulting in the formation of a great variety of cell types

Following fertilization, a zygote divides and soon becomes a multi celled embryo with many different cell types, as represented below.

the bananas produced maintain consistent characteristics in quality, taste, and appearance from one crop of clones to the next

Growers on large banana farms that supply food commercially have chosen to limit their plantings exclusively to Cavendish banana plants. What advantage is likely cited by the growers for continued planting of these asexually produced crops year after year?

The substitution mutations would result in the same amino acids as the original strand so there would be no effect on the protein

How would the mutated DNA strand affect the structure of protein x?

A difference in the pH of an environment changes enzyme activity

Students did an experiment comparing the activity of four different: A, B, C, and D. The results are represented in the graph below. A valid conclusion based on the information in the graph is that

can furred mice produce furless mice?

Students studied Mendel's laws of segregation and independent assortment. They created a Punnett square to show a cross between a homozygous furred mouse (FF) and a homozygous furless mouse (ff). The students then created a second Punnett square for a cross between 2 heterozygous F1 mice. Which question could be answered using the information from the Punnett squares?

molecule transport and energy use

The diagram below illustrates the movement of glucose across a cell membrane. Which 2 processes are most directly represented in this diagram?

fewer genetic differences

The diagram represent 2 reproductive processes used by different organisms. When compared to organisms that utilize process A organisms that utilize process B would most likely produce offspring with

molecules other than carbon dioxide and water are needed to produce a sugar

The equation and diagram shown provide Information about the process of photosynthesis. The best summary of the difference between the equation and the diagram is that the diagram illustrates that:

The tRNA delivers amino acids to the ribosome so that they can be added to the developing peptide

The model shows part of a process that uses tRNA. Which description explains the role of the tRNA in the process shown in this model?

as the phytoplankton population reached capacity, the number of viruses began to increase because the phytoplankton were the hosts to the viruses and replicated the viruses' genome. AND. The phytoplankton population decreased as the number of viruses increased because the cells of the phytoplankton were destroyed as the viruses used them to increase the number of viruses in the environment

The scientists claimed that the growth and stability of the phytoplankton populations were affected by the viruses. Using the Information given, which TWO arguments support this claim?

The alleles for flower color show INCOMPLETE DOMINANCE because both alleles are PARTIALLY EXPRESSED in HETEROZYGOUS individuals

This Punnett square shows the inheritance of lower color in snapdragon flowers

Nondisjunction

Use the diagram to the left to answer the question that follows. Which heritable change is shown in the diagram?

cellular respiration

Which biological process is represented by the diagram below?

the population size is recorded for each species present in the construction area before and after the building is completed

Which method of collecting data would provide the most accurate information about how an ecosystem is being affected by human development?

dna and ribosomes

a simplified model of a bacterial cell is shown here. Upon analysis of the internal structures of this cell, predict which organelles would be found. Choose all that apply

the growing habitat range of the prairie dog populations throughout the US

consider the status of the black-footed ferret. what is the most logical contributing factor to its endangered status?