Biology End of Course Review

A scientist is trying to determine if a specimen is a virus or not. Which of the following will help her decide?

• if it has DNA

• if it is really small

• it has no organelles

• it has a protein coat

Crossing over helps promote ?

• male genotype
• genetic variation
• DNA replication
• mitosis

Tags

NGSS.MS-LS4-4

Saprophytes are fungi that feed on dead and decomposing organisms. They secrete enzymes that digest components of cell walls, such as cellulose and lignin.

Which statement explains why these fungi are an important part of the biogeochemical cycle?

• Saprophytes perform gas exchange that assists the cellular activities of autotrophs.

• Saprophytes extract minerals from living tissue to recycle them back into the soil.

• Saprophytes transport nutrients through the xylem and phloem in autotrophs.

• Saprophytes return organic material to the soil for use by living organisms.

Tags

NGSS.MS-LS2-3

What is the probability of heterozygous offspring?

• 25%
• 50%
• 0%
• 100%

Tags

NGSS.HS-LS3-3

During Darwin’s travels to the Galapagos Islands, he discovered several different species of finches, each with a distinctive beak type. What is the best explanation for the different types of beaks in the finches?

• Each species of finch was brought to

  the islands by explorers over the

  course of several decades.

• The finches are capable of adjusting

  their beak type depending on what

  predators are hunting them.

• The type of beak on each individual finch depends on what mutations that finch receives during reproduction.

• Natural selection caused each species of finch to have the type of beak best suited for survival in its environment

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

The Linnaean taxonomic system classifies organisms into divisions called taxa. If two organisms belong to the same taxonomic group, they are related. Similarity at which of these levels indicates the closest relationship?

• Kingdom

• Class

• Order

• Genus

Tags

NGSS.MS-LS4-2

Five general characteristics of organisms in kingdoms Plantae or Fungi are listed in the box. Which table correctly lists the characteristics of the organisms in the two kingdoms?

• 
• 
• 
• 

Tags

NGSS.MS-LS4-2

NGSS.MS-LS1-6

Which statement best describes the role of the circulatory system in the human body’s response to infection?

• The flushing action of blood washes pathogens from the site of infection as the pumping action of the heart transports pathogens to the kidneys where they are disposed of in urine.

• Redness at the site of infection indicates increased blood flow to the site, allowing white blood cells to promote healing by removing pathogens.

• Blood vessels transport pathogens, nutrients, and oxygen to cells and transport wastes and carbon dioxide away from cells

• Low numbers of blood platelets can result in uncontrolled bleeding, while a shortage of red blood cells may indicate anemia.

In the process of deamination, the liver converts amino acids into compounds that can be used in energy metabolism. The liver removes the amino groups from amino acids to produce urea. Then, the urea is removed from the body as urine. During this process, the liver works in conjunction with which body system?

• Endocrine

• Excretory

• Nervous

• Respiratory

Recent studies in bone research indicate that using ultrasound on a broken bone can decrease the healing time by 25%. Which of these are the most basic levels of organization involved when a bone heals?

• Cells and tissue

• Cells and organ system

• Organ system and organism

• Tissue and organ system

Tags

NGSS.HS-LS1-2