All compounds that have been found to be mutagenic in the Ames test are also carcinogenic. View Available Hint(s) All compounds that have been found to be mutagenic in the Ames test are also carcinogenic. True False Submit Part B Why are liver extracts used in the Ames test? View Available Hint(s) Why are liver extracts used in the Ames test? A liver extract is necessary for the bacteria to produce histidine revertants. Liver enzymes activate the bacterial enzymes. Liver enzymes may activate some innocuous compounds, making them mutagenic. The bacteria require the nutrients present in the liver extract for growth.

Answer:

Part A: False

Part B: Liver enzymes may activate some innocuous compounds, making them mutagenic

Explanation:

The Ames test, also known as Salmonella typhimurium reverse mutation assay, is a bacterial short-term technique used to identify if a particular chemical compound may cause mutations in target cells. It has been shown that there exists a positive correlation between carcinogenicity and mutagenicity in the Ames test, but this correlation is not absolute. In the Ames test, a rat liver homogenate (containing liver enzymes) can be added in order to identify substances that are not mutagenic themselves but are metabolized in order to form a mutagen (e.g., benzopyrene).

In a scientific investigation, after the question is defined, the next step is most likely which of
the following statements?
A. Collecting the data
B. Formulating a hypothesis
C. Designing the experiment
D. Identifying materials needed

Why are drugs bad for people?

Which of the following connects the right and left hemispheres of the brain, allowing communication between
the to?
Medulla Oblongata
Pons
Corpus Callosum
Brain Stem

Which of the following best describes physical science

Which of the following describes the process of DNA making copies of itself.
Transcription
Substitution
Translation
Replication

Las margaritas se cierran durante la noche y se abren al amanecer. Durante los inviernos fríos, algunos animales hibernan, a la espera de las estaciones mas cálidas, cuando abunda el alimento. Cuando sentimos frio se nos pone “la piel de gallina” y tiritamos, en cambio si hace calor, nos da sed y bebemos agua ¿Qué tienen en común estas situaciones?

How is facilitated diffusion similar to
active transport?
A. Neither require energy.
B. They both use protein channels.
C. Both move against the concentration gradient.

Which type of muscle is long and striated and contains multiple nuclei?
Smooth Muscle
Cardiac Muscle
Muscle of the Digestive System
Skeletal Muscle

which student made observations of a community of organisms?
1. Student 1
2. Student 2
3. Student 3
4. Student 4

how does a bees ability to see color differ from a humans

Need help, I will give branliest

Hello! could someone please do a 4 sentence quark poem

The dominant trait for flower color in pea plants is purple (P) and the recessive trait is white flowers (p). What is the phenotype of a plant with the alleles, Pp?​

In order to maintain homeostasis, it is most important for an animal to be able to ?
F increase its prey population
O respond to its environment
H change its habitat
o hide from its predators

FOODS HIGH IN PROTEIN RELEASES ENERGY
A. FAST
B. QUICKLY
C. SLOWLY​

Pls I need help thank you. And pls don’t send me a link.

In humans, free earlobes are dominant to attached earlobes, and a straight thumb is dominant to a hitchhiker's thumb. Cross two people that are heterozygous for both traits. Include a punnett Square

3. Which of the following statements best explains how the cell membrane 1 point
is selectively permeable? *
The movement of specific substances into and out of the cell is controlled by the cell
membrane
The movement of waste substances into, but not out of the cell is controlled by the
cell membrane
The cell membrane is inflexible and cannot control the movement of substances into
and out of the cell
The cell membrane does not surround the cell so it plays no role in the movement of
substances

PLSSS HELP IMMEDIATELY!!!!!! i need help rn only answer if u know, i’ll mark brainiest!

The Florida panther used to live in forests, prairies, and swamps over most of the southeastern United States. Now, it lives only in the southern tip of Florida, south of the Caloosahatchee River. Based on this information, what is the most likely cause of the decline of the Florida panther population?

Which body system in humans has a similar function to the gills in a fish?
а
b
Circulatory System
Digestive System
Respiratory System
Endocrine System
Od

What’s your favorite car first to answer gets brainliest

¿Con que otro nombre se le conoce a las placas de espuma de poliuretano altamente contaminante?

True or False

The cell theory is 1. All living things are made of cells, 2. The cell is the basic unit of life, 3. All cells come from pre existing cells.

Can someone plz help

Which is the snowy owl's genus?
a) Scandiacus
b) Bubo

In Amish populations, we see a much higher amount of a specific type of dwarfism compared to the rest of the human population. Which term is best applies to this situation?




Both of these

Genetic Drift

Founder Effect

None of these

An eastern screech owl, a carnivore, might compete with which organism most intensely for resources?

A. hawk (secondary consumer)
B. mountain lion (secondary consumer)
C. wren (primary consumer)
D. mouse (primary consumer)

what triggers angry in the brain? ​

BRAINLES
plz help thank you​