WGU C190 Preparation Quiz 1

C190 Preparation Quiz 1 Leave the first rating Students also studied Terms in this set (41) Science Biology Cell Biology Save WGU C190 Introduction to Biology Teacher 123 terms lisa_simms9Preview WGU C190 Intro to Biology 311 terms ellen_nicole_allen Preview Bio WGU study for OA c190 329 terms sara_rastetter Preview c190 wg 120 term Tnw Which has the correct order of biological organization from smallest to largest?

• Cell -> Organ System -> Population -> Biome

_____ is an example of an abiotic factor while _____ is an example of a biotic factor.D. Temperature … bacteria As winter progresses, ice will form and stay at the surface of a pond as it thickens throughout the season. Which property of water allows this to happen?

• Hydrogen bonds between water molecules become more stable, and

molecules spread out as the temperature decreases causing water to become less dense.If an atom is neutral, which particles are present in equal numbers?

• Protons and electrons
• multiple choice options

Which statements about macromolecules are true?(Select 2)

• Proteins transport molecules across the cell membrane.
• Carbohydrates provide structural support to cell walls.

What is a difference between RNA and DNA?A. RNA contains uracil, and DNA contains thymine.If an atom is neutral, which particles are present in equal numbers?

• Protons and electrons

Which statement about hydrogen bonds is true? B. They form between an electronegative atom and a hydrogen atom.Which characteristic could be used to differentiate an organism as prokaryotic or eukaryotic?

• It contains endoplasmic reticulum.

Which macromolecule is not present in the cell membrane?

• Nucleic Acids

Which membrane transport mechanisms require a transport protein? (Select 2)

• Active transport
• Facilitated diffusion

Which statements about ATP are true? (Select 2) C. It is generated by phosphorylation of ADP.

• It is chemical potential energy.

Which statements describing photosynthesis are true?(Select 2)

• FADH2 carries electrons to the Calvin-Benson cycle.
• Solar energy is converted to chemical potential energy.

What is the overall reaction for cellular respiration? D. Glucose + Oxygen --> Carbon dioxide + Water + ATP Which statements about fermentation are true? (Select 2) It occurs in the cytoplasm.

• It generates less ATP than cellular respiration.

A diploid cell is in G1 phase of the cell cycle. What would you observe in this cell? (Select 2) Homologous chromosomes

• Chromosomes composed of a single chromatid

The two major components of chromosomes are _____ and

_____ .

DNA ; histone proteins Which stage of mitosis is represented in this image? Prophase What occurs during anaphase of mitosis?B. Sister chromatids are pulled apart at the centromere.Which stage of meiosis is represented in this image? C. Metaphase I Mitosis produces _____ , while meiosis produces ____ . C. body cells called somatic cells ; sex cells called gametes A homozygous tall pea plant is crossed with a heterozygous tall pea plant. What are the phenotypic and genotypic ratios of the potential offspring?

• 100% tall phenotype, 50% heterozygous genotype

What are the 4 possible gametes formed with these two pairs of homologous chromosomes?

• BE, Be, bE, be

Human Hypercholesterolemia is an inherited condition that causes high levels of LDL (Low Density Lipoprotein) cholesterol. The dominant allele (H) makes LDL receptors, and the recessive allele (h) cannot make LDL receptors. The LDL receptors mop up excess LDL particles from the blood and promote their breakdown, which prevents the accumulation of cholesterol in the arteries. Individuals with the genotype HH show the normal no disease condition. Individuals with the genotype Hh show the mild disease condition, and individuals with the genotype hh show the severe disease condition. Which inheritance pattern is observed for Human Hypercholesterolemia?

• Incomplete dominance

All Siamese cats are born with pale fur, but within the first few weeks, the ears, nose, paws, and tail turn dark. They have the genotype for dark fur in their entire body. But the enzyme that produces the dark pigment is inactive at temperature above 93°F. Since the ears, nose, paws, and tail become cooler than the rest of the body once they are born, dark pigment is produced in those areas. How can we explain this?

• The environment influences the expression of genes.

Marfan Syndrome is a connective tissue disorder that follows an autosomal dominant inheritance. If a father who is heterozygous for Marfan Syndrome has a child with a mother who is homozygous recessive for Marfan Syndrome, what is the probability that they will have a child with Marfan Syndrome?

C. 50%

Which statement about DNA replication is true? B. It is a semi-conservative process that happens in the nucleus of eukaryotic cells.Which statement about gene expression is true? D. In the second step, RNA is translated into protein in the ribosome.A variation in the nucleotide sequence of a gene in the DNA will always result in _____ .

• a change in the mRNA codon

A population of moths in England has light colored individuals and dark colored individuals. The moths are frequently found on light colored trees. Prior to industrialization, the lighter moths had higher fitness than the darker moths because they blended in better with the light bark, and predators could not see them as well.Once factories and industries started producing pollution, dark soot covered the trees with light bark, making them darker. What effect would this environmental change most likely have on the population?

• Darker moths will be more likely to survive and reproduce.

When male lions reach sexual maturity, they leave their pride in search of a new pride. Mating with females in the new pride can change the allele frequencies in the population through which mechanism?

• Gene Flow

Which scenario best describes how a speciation event could occur?

• Two populations of fish migrate to different habitats, and members of the two

populations stop reproducing with each other.According to the cladogram, which statement correctly describes organisms that share homologous features?

• Giant Panda and Dog share similar ear structure.

Two different populations of ground squirrels are separated by the Grand Canyon. A single male squirrel makes the journey between the two populations and has offspring, impacting allele frequency in his new population. This is an example of _____.

• Microevolution

The image depicts giraffes browsing on acacia tress in the African savannah. The giraffes in the picture represent which level of biological organization?

• Population

Although not particularly abundant, elephants play an important role in the African Savannahs. When elephants knock down trees and eat shrubs, they provide critical support of other species. Felling trees and eating brush maintain resources for and allow grasslands to flourish.This provides food for Africa's herbivores and, in turn, food for the carnivores. Also, it creates spaces to burrow for small animals. Some seeds that are excreted in elephant dung can have up to 400% greater chance of germination and provide food sources for many species - including people. Based on this information, elephants in the savanna are most likely _____ .

• keystone species

A flock of white egrets follows a herd of wild horses around the prairie. As the horses graze, they dig their hooves into the soil, exposing insects and worms. The egrets consume the insects and worms as they follow the horses. The egrets benefit from this relationship because they have an easier time finding food. The horses appear to be unaffected. The relationship between the horses and the egrets is an example of _____ .

• commensalism

Which statement about energy in an ecosystem is true? A. Energy flows through an ecosystem, while matter is cycled within it.How is the Calvin-Benson cycle of photosynthesis linked to the carbon cycle?

• The carbon in carbon dioxide is incorporated into glucose.

What is the most likely impact of cutting down a forest to build a housing development?

• Destroying habitats