Which statement best describes how a virus replicates?

In a Central Texas grassland, the producers incorporate 12,000 kJ of energy from the sun into their tissues. About how much energy would be incorporated into the tissues of herbivores?

After completing your calculations, what is the average amount of energy transferred from one trophic level to the next?

If the producer has 20,000 kJ of energy, how much energy should the secondary consumer have?

For an energy pyramid, the 10% rule states that

The 10% rule states that 10% of energy moves from each trophic level to the next.

In the pyramid, if the producers level contains 1234 kilocalories, how many kilocalories are transferred to the primary consumer level?

Positive thigmotropism is a response in plants in which they move and grow toward an object the plant comes into physical contact with, usually curling around the object. (Refer to the diagram showing a plant's tendril curling around a stick for support over time.) This response of the shoot system benefits the plant by allowing the plant to —

What type of tropism is the response to water? 

What type of tropism is the response to touch?

A model of the genetic control of coat color in rabbits is shown. Allele | Phenotype | Inheritance C | Black | Dominant to all other alleles c^ch | Chinchilla | Recessive to C; Dominant to c^h and c c^h | Himalayan | Recessive to C and c^ch; Dominant to c c | Albino | Recessive to all other alleles Which Punnett square represents a cross that would produce albino offspring?

Which statement best describes the interaction between body systems that allows horses to repel biting flies?

Which of these shows an example of an insertion mutation?

Based on the food web, how would a significant decrease in the sea otter population due to an oil spill most likely affect this ecosystem?

White clovers, Trifolium repens, are plants that are native to Europe and Central Asia and are able to produce the poison cyanide within their cells. Skunk cabbage, Symplocarpus foetidus, is a plant that is native to eastern North America and can produce a chemical that makes it have a strong, foul odor and bitter taste. The chemicals produced by both the white clovers and skunk cabbages are adaptations that allow them to —

Blue flying fish live in the upper layers of the ocean. Blue flying fish have enlarged pectoral fins that enable them to glide for 400 meters above the ocean surface and appear to fly. Which statement best describes how natural selection led to enlarged pectoral fins in blue flying fish?

Which factor will most directly determine what type of specialized cell will be produced?

Which statement best describes the cells during Stage II?

Green anoles are lizards that can change their skin color rapidly in response to various stimuli. This adaptation is the result of —

Which type of movement across a cell’s plasma membrane requires energy supplied by ATP?

Leaf-cutter ants harvest leaves and carry them to fungi that convert plant material into a usable form for the ants to digest. The fungi depend on the leaves for nutrients. The ants also produce an antibiotic on their bodies that helps protect the fungi from harmful bacteria.

A cellular process is shown. Which of these is the most likely result of the process shown in the diagram?

What components make up the backbone of a DNA molecule?

Why is it important to assign each organism a scientific name?

Which amino acid would be coded first from the DNA strand being transcribed?

Students studying the interaction among the reproductive parts of flowering plants make the graphic organizer shown. [Flowchart: The __ (1) __ attract pollinators. → Pollen is deposited on the __ (2) __. → The pollen grain grows and fuses with the __ (3) __.] Which terms best complete the numbered blanks in the flowchart?

What do we call the yellow dust of the flower that is attached to the stamen?

The _____ is the female reproductive organ of a flower, consisting of the stigma, style, and ovary.

_____ is the transfer of pollen from male reproductive structures to female reproductive structures in plants.

The graph shows the oxygen consumed by an athlete during different stages of training. Based on the graph, which process is occurring between minute 5 and minute 10?

The graph shows the oxygen consumed by an athlete during different stages of training. Based on the graph, which process is MOST LIKELY occurring between minute 5 and minute 10?

Which sequence best describes an interaction between the integumentary and excretory systems that helps maintain homeostasis?

Which characteristic best distinguishes these cells as either prokaryotic or eukaryotic?

Which statement best describes a similarity among trees, cats, and amoebas?

Students designed an experiment to model the carbon cycle. The students combined water and carbon dioxide-producing disks in a sealed flask. The flask represented Earth’s atmosphere, and the lamp represented the sun. Their design is shown in the diagram. Which component can be added to the flask to reduce the concentration of carbon dioxide in the model atmosphere created by the disks?

The reverse of photosynthesis - Sugars are used for metabolism and change “fuel” back into CO2.

Which characteristic do all organisms in Kingdoms Animalia, Protista, and Fungi have in common?

Based on this table, which explanation best describes why elk and fallow deer are classified in the same genus?

In domesticated dogs, hair type is controlled by two different alleles. The allele for wire hair is (H) and the allele for smooth hair is (h). When two heterozygous dogs are crossed, what percentage of the offspring is expected to be homozygous for smooth hair?

In a recent study, scientists investigated the effects of microorganisms naturally found in the body. They raised mice in two different environments and compared their immune system functions in response to a bacterial infection. Their data are shown. Mouse | Environment | Immune System | Response to Bacterial Infection 1 | Without microorganisms | • Low variety of immune cells | • Weak immune response to bacteria 2 | With microorganisms | • High variety of immune cells | • Strong immune response to bacteria Which conclusion about the microorganisms naturally found in the body is most likely supported by these data?

Field of microbiology that studies the impact of microorganisms on the immune system.

a foreign protein on the surface of a cell that stimulates an immune response (reaction).

1. Any substance that triggers an immune response

Which part of the DNA model is most directly associated with the coding of genetic information?

Which part of the DNA model is most directly associated with the coding of genetic information?

Label the image with the best word.

A table comparing the characteristics of four samples is shown. Which sample most likely contains viruses?

What is the name of this virus

Using a light microscope, a student identified the following characteristics of four organisms found in a sample of pond water. Based on the observations of the student, which organisms most likely belong to the taxonomic group for bacteria?

A table comparing the characteristics of four samples is shown.

Which sample most likely contains viruses?

Which statements best compare a function of proteins and lipids in a human cell?

Which model best represents the molecules at the end of the reaction?

When looking at the enzyme substrate model, the substrate turns into what at the end of the chemical reaction?

Which statements explain how a mutation in a somatic cell is different from a mutation that occurs in gametes?

Which table best compares the events that occur during different stages of the cell cycle?

Which model accurately shows a cell progressing through mitosis?

Identify the following stage of the life cycle of the cell in the picture.

During which stage of mitosis do the chromosomes line up in the middle of the cell?

What is the first stage of mitosis where chromosomes condense and become visible?

Which statement best describes what will happen to cells in an organism that lack contact inhibition?

Some relationships between species found in the Texas Gulf Coast are shown in the food web. (Refer to the food web diagram.) Which energy pyramid best models energy flow in the Texas Gulf Coast community?

In some coral reefs, a symbiotic relationship exists between pygmy seahorses and sea fans. The pygmy seahorse can wrap its tail around the branches of the sea fan. This allows the pygmy seahorse to be camouflaged within the sea fan, protecting it from predators. The pygmy seahorse does not harm or benefit the sea fan while it grasps the branches with its tail.

Two scientists studied patterns of evolution in the fossil record. Many species they analyzed showed periods of slow changes interrupted by a period of rapid change. This pattern of periods of slow change interrupted by periods of rapid change with few, if any transitional fossils, best describes the theory of —

Evolutionary theory which states that macroevolution occurred over very short intervals followed by long time periods of no macroevolution is called...

Cross-pollination of flowers from different populations of the same species will most likely result in —

Which numbered location on the phylogenetic tree identifies characteristics shared by Species B, C, and D?

Both the respiratory system and the digestive system involve the uptake of necessary molecules from an animal’s surroundings. Alveoli are tiny sacs that aid in the exchange of carbon dioxide and oxygen in the lungs. Intestinal villi are tiny projections along the lining of the intestines used to take in nutrients from food passing through. Which system must interact with the respiratory and digestive systems to transport gases and nutrients throughout the body?

Which of the following best describes homeostasis?

After a wheat field is cleared, wild grasses and weeds begin growing. This process is considered —

A model of two structures that perform cellular processes is shown. What are the products of the cellular processes in these organelles?

During an extended dry season in an area, the majority of the ground cover dried up. Which description best explains how this would affect the ecosystem in that area?

Water, sugar, and other important nutrients need to be transported from one part of a plant to another. Which statement correctly describes the interaction of the root and shoot systems during nutrient transport?

E. coli has three genes that each code for different enzymes that break down lactose. Scientists conducted investigations about the production of these enzymes using samples of E. coli. Their results are shown in the table. E. coli Investigation Results | Environment | Contains Lactose | Enzyme Concentration | |-------------|------------------|---------------------| | 1 | Yes | High | | 2 | No | Low | Which conclusion about the production of the enzymes can be determined by analyzing the scientists’ results?

the temperature at which American alligator eggs are incubated will affect the gender of the offspring. Eggs kept at 30^oC tend to hatch mostly male.

Which statement explains why the temperature affects the gender of alligator hatchlings?

E. coli has three genes that code for different enzymes that break down lactose. Scientists conducted investigations about the production of these enzymes using samples of E. coli. Their results are shown in the table.

Which conclusion about the production of the enzymes can be determined by analyzing the scientists' results?

Snowshoe hares can be found living in the Rock Mountains of New Mexico. During the summer months, when there is no snow on the ground, the snowshoe hare's coat color is typically brown. During the winter months, when the mountains are covered in snow, the snowshoe hare's coat is typically white.

Which statement describes the genetic basis for the seasonal change in coat color?

CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of an organism. Using this technique scientist can add, remove, or modify sections of the DNA sequence.

How can scientists use this technique to control gene expression?

Which of the following factors can influence gene expression?

How can environmental factors affect gene expression?

Gene expression is solely determined by genes and is not impacted by the environment.

Which of these best explains how the viceroy butterfly benefits from looking like the monarch butterfly?

Birds do not like to eat monarch butterflies. Since a viceroy butterfly is about the same size, shape and color as a monarch butterfly, the birds leave it alone because they think the viceroy butterfly is a monarch butterfly.

What type of mimicry is exhibited by Eristalis tenax?

Monarch butterflies are toxic to birds because monarch caterpillars eat milkweed. Viceroy butterflies closely resemble monarchs, but are not toxic since the caterpillars do not eat milkweed. This similarity in appearance developed because viceroy butterflies that closely resemble monarchs are

Which sequence represents the levels of organization found in a multicellular organism, from smallest to largest?

10C: Which sequence represents the levels of organization found in a multicellular organism, from smallest to largest?

Which sequence illustrates the increasing complexity of levels of organization in multicellular organisms?