WorksheetsSteele HS Biology Blitz Category 1 2019
Total questions: 25
Worksheet time: 13mins
The picture shows a student using a microscope to study a prepared slide of a single-celled organism.
A single-celled organism can be classified as a prokaryote based on the absence of —
a cell membrane
ribosomes
chromosomes
a nucleus
A remora is a fish that has an adhesive disk on the back of its head that it uses to attach itself to a large shark. When food floats away from the shark’s mouth as it feeds, the remora collects the scraps. Drawings of a shark with a remora attached and a remora’s adhesive disk are shown below.
predation
parasitism
commensalism
competition
Part of the cell cycle is shown in this simplified model.
This part of the cell cycle is best described as the process that —
duplicates the DNA
completes cell division
maintains genetic homeostasis
synthesizes new molecules
The human immunodeficiency virus (HIV) often infects and destroys CD4 T cells. These CD4 T cells are one of many kinds of white blood cells that are an important part of the immune system.
The most common danger related to the destruction of CD4 T cells is —
an increase in the risk of high blood pressure
an increase in the threat of diseases caused by microorganisms and viruses
a decrease in the flow of blood to vital organs
a decrease in the amount of oxygen being transported to tissues
Students were given a list of seven elements and asked to identify the four elements that are most abundant in biomolecules. Which table correctly identifies the four most-abundant elements in biomolecules?
Which molecule synthesized by plants is a major source of energy for cellular processes in both plants and animals?
Wax
Nucleic acid
Glucose
Chlorophyll
From a single fertilized ovum undergoing a series of rapid cell divisions, a human infant develops. The embryonic cells become specialized for a variety of functions. Which of these statements best describes how different cell types develop?
Each cell type contains only the active parts of the DNA needed for that cell type.
Each cell type has only one chromosome containing the DNA needed for that cell type.
Each cell has an identical copy of DNA with enzymes controlling the expression of specific genes, leading to a variety of cells.
Each cell has multiple copies of DNA that are affected in different ways by the
environment to change the function of the cell at regular intervals.
The energy pyramid below shows the energy made available by producers.
Based on the energy flow between trophic levels in an energy pyramid, how much energy would be expected to be found at the secondary consumer level in this pyramid?
100 joules
500 joules
1,000 joules
50 joules
The surface of the stomach is lined with epithelial cells called surface mucous cells. These cells produce a thick mucus that coats the epithelium on the inside surface of the stomach. What is the purpose of the mucous coating?
It allows the epithelium to aid in the process of digestion.
It causes the epithelium to expand as food enters the stomach.
It protects the epithelium from the acid content of the stomach.
It traps nutrients inside the epithelium as food passes through the stomach.
People who have leukemia, a cancer that affects white blood cells, are often given Cytarabine. This drug inhibits the synthesis of DNA. Which phase of the cell cycle is most affected by Cytarabine?
G1 phase
S phase
G2 phase
M phase
The picture shows a contractile vacuole of a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environment.
What conditions cause the contractile vacuole to fill with water?
The concentration of water is greater outside the cell than inside the cell.
The temperature of water in the vacuole is higher than the temperature of its environment.
The concentration of water inside the cell is the same as the concentration outside the cell.
The temperature of water in the vacuole is lower than the temperature of its environment.
The rocky material left behind by a retreating glacier forms what is called a moraine. When primary succession occurs on a moraine, which life-forms will help create the soil by breaking down bare rock?
Insects
Lichens
Grasses
Deciduous trees
Proteins and carbohydrates have many functions in the body of an organism. Specific proteins and carbohydrates perform specific tasks. Information about a protein and a carbohydrate is given below.
How are ferritin and glycogen similar in their primary functions for an organism?
Both store materials needed by the organism.
Both store energy used by the organism.
Both support the structure of the organism.
Both store information for the organism.
Saprophytes are fungi that feed on dead and decomposing organisms. They secrete enzymes that digest components of the cell walls. Such as cellulose and lignin.
Which statement explains why these fungi are an important part of biogeochemical cycle?
Saprophytes perform gas exchange that assists in 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.
The diagram shows light and dark-colored beetles that live on a tree. Which result is most likely to occur to the beetle population due to predation over time?
The number of light-colored beetles in the population will increase.
There will be more dark-colored beetles than light colored beetles.
The number of light-colored beetles will decrease.
The dark-colored beetles will move to a different type of tree.
The image shows part of the humerus bone in different genera of primates. Which statement is best supported by the observable structures of the different humerus bones?
The primates lived in similar environments.
The primates shared a common ancestor.
The primates interbreed with similar organisms in a population.
The primates had diets that consisted of similar types of foods.
1. Which two body systems must directly interact for vertebrate organisms to exchange gases?
A. Skeletal system and muscular system.
Excretory system and reproductive system.
Circulatory system and respiratory system.
Digestive system and immune system.
What is the role of mRNA in expressing specialized structures?
Making energy available for cellular activities.
Creating bonds to form biomolecules.
Producing sugars that assist with replication.
Providing information to form proteins.
A corn plant produces both male and female flowers. The male flower forms the tassel and the female flower forms the ear of the corn. The silks that emerge from the ear are the stigma of the female flower. Each silk leads to an ovule that can become a corn seed.
Which of these must happen for corn seeds to develop on the ear?
More tassels than silks need to be present on the same plant.
Pollen grains must fall from tassels and land on the silks of the ear.
Pollen must be transported from the tassel to the silk through the phloem.
The tassels must come into direct contact with the silks of the ear.
The gray squirrel, Eastern fox squirrel, and red squirrel are all different species of squirrels. Why is having a scientific name for each species of an organism important?
To prevent existing named organisms from having their names changed as they become extinct.
To keep the classification system from being altered as new organisms are discovered.
To allow organisms to be placed in many classification levels at the same time.
To standardize the naming and organization of organisms to avoid confusion.
A student groups different types of cells as shown. Which table headings should the student use for the two groups?
1- Animal Cells ------ 2 - Plant Cells
1 - Prokaryotic Cells -- 2 - Eukaryotic Cells
1 - Mobile Cells ----- 2 - Motile Cells
1 - Fungal Cells --- 2 - Bacterial Cells
The female reproductive and endocrine systems work interactively for which main purpose?
To maintain homeostasis by removing waste products from the body?
To release neurotransmitters during times of stress.
To control hormone levels to prepare the body for pregnancy.
To exchange gases to support cellular aerobic respiration.
Plant roots have extensions called root hairs. These root hairs are important in the homeostasis of the plant. Which statement best explains the importance of the root hairs to the stems and leaves of the plant?
Root hairs convert minerals into glucose for immediate use by cells.
Root hairs decrease the need for osmosis and diffusion in a vascular tissue.
Root hairs prevent water loss in leaves through transpiration and gas exchange.
Root hairs increase the surface area of the roots for nutrient and water absorption.
The white cattail is a hybrid species of plant that is a result of the cross between the broad-leaved cattail and the narrow-leaved cattail. Over time, the white cattail has established itself in the wetlands of Midwestern states.
Which of these explains the success of the white cattail?
Favorable genes from parental generations provide advantageous characteristics to the hybrid species.
Hybridization produces offspring traits that allow different species to survive in extreme environments.
Inherited traits passed on from parental generations make hybrid species more susceptible to disease
Hybrid species display more adaptations due to their reduced genetic diversity.
Enchanted Rock State Natural Area is located in Central Texas. Enchanted rock is a dome of granite. The area contains four easily identifiable communities. The table describes characteristics of each type of community in the area. A student studying primary succession should focus on which of these communities?
Open oak woodland
Mesquite grassland
Floodplain
Granite rock
