"why is it difficult to grow bordetella pertussis in a laboratory"
It is difficult to grow bordetella pertussis in a laboratory because of its inability to grow on ordinary laboratory media such as nutrient agar or macconkey agar. The organism will only grow on specialized media supplemented with charcoal, blood (20%), potato (starch) in order to absorb toxic substances which can inhibit its growth in the agar.
chromosomal mutation definition
Answer:
Chromosomal mutation is the change in the structure or number of chromosome.
Explanation:
Chromosomal mutation simply refers to a change in the structure of chromosomes.
The structure of chromosome changes as a result of deletion, duplication, inversion or translocation.
Deletion refers to the loss of certain segments of the chromosome.
Duplication of segments of the chromosome leads to repetition of some genes.
Inversion is the change in the order of genes on a chromosome.
Translocation involves the insertion of chromosomal segments into a non-homologous chromosome.
Chromosome number can change as a result of non-disjunction during meiosis. This may result in aneuploidic or polyploidic chromosomal conditions
BRAINLIESTTTT ASAP!!!
1. Which two particles are present in the nucleus of an atom?
Electrons and neutrons
Electrons and molecules
Protons and neutrons
Protons and electrons
2. Boron is to the immediate left of carbon in the same row in the periodic table. Which of the following statements compares the radius and pull exerted by the protons of boron and carbon atoms?
Boron has a smaller radius and the protons in carbon exert a greater pull.
Boron has a larger radius and the protons in carbon exert a greater pull.
Boron has a smaller radius and the protons in carbon exert less pull.
Boron has a larger radius and the protons in carbon exert less pull.
1. Protons and neutrons are present in the nucleus of an atom.
2. Boron has a smaller radius and the protons in carbon exert a greater pull.
The nucleus of an atom contains protons, which have a positive charge, and neutrons, which have no charge. Electrons, which have a negative charge, orbit around the nucleus in electron shells.
Boron is located to the left of carbon in the same row of the periodic table. As you move across a row from left to right, the atomic radius generally decreases. Therefore, boron has a smaller radius than carbon.
The protons in carbon exert a greater pull because the effective nuclear charge is higher due to the increased number of protons.
Learn more about Atom, here:
https://brainly.com/question/1566330
#SPJ4
Bees visiting flowers to harvest pollen and carrying some to pollinate other plants would be considered an example of _____. see section 52.1 (page 1093) .
Where are barbules and pinnae connected to the feathers ?
____ is a hormone secreted by the pituitary gland that stimulates ovulation or testosterone secretion.
Clear-cutting ________. restricts timber harvesting to mountaintops is harvesting trees from coastal areas only involves elimination of subsidies to farmers is a form of violent protest favored by radical environmental organizations removes all trees from an area
The fundamental excitable cell in the nervous system is the _____. see concept 49.1 (page 1084)
Neuron
Neuron can be defined as excitable cell that usually carries, processes and transmit impulses or electrical signals. Thus, they are known to be basic unit of the nervous system which includes the spinal cord and brain. However, the signals between s neurons occur via certain connections called synapses.
The fundamental excitable cell in the nervous system is the neuron. Neurons transmit electrical signals, called action potentials, to convey information and produce movements in response to stimuli. They are also involved in thought processes within the brain.
Explanation:The fundamental excitable cell in the nervous system is the neuron. Neurons are responsible for transmitting electrical signals, called action potentials, that convey information and produce movements in response to stimuli. They also play a crucial role in thought processes within the brain.
Neurons, the fundamental units of the nervous system, feature a cell body (soma), dendrites for receiving signals, and an axon for transmitting signals to other neurons or cells. Axon terminals release neurotransmitters, facilitating communication at synapses. Neurons exhibit electrochemical signaling, enabling the transmission of information throughout the nervous system, vital for cognition and behavior.
An experiment was run to examine the kinetics of an enzyme catalyzed reaction of compound a with enzyme e to produce product (p) and the enzyme. the reaction is:
When animal cells are grown in a petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. this arrest of division is an example of __________ mitosis s phase. density-dependent inhibition. lack of nutrients?
"an organism's phenotype is describing what about that organism"
Which of the following statements best proves that the law of conservation of mass is obeyed during photosynthesis?
A: The starting total number of oxygen atoms in carbon dioxide is equal to the ending total number of oxygen atoms in glucose.
B: The starting total number of oxygen atoms in carbon dioxide gas is equal to the ending total number of oxygen atoms in glucose and oxygen.
C: The total mass of glucose and oxygen formed from photosynthesis is equal to the total mass of carbon dioxide and water used up during the reaction.
D: The total mass of glucose and carbon dioxide formed from photosynthesis is equal to the total mass of oxygen and water used up during the reaction.
The answer is: C. The total mass of glucose and oxygen formed from photosynthesis is equal to the total mass of carbon dioxide and water used up during the reaction.
The law of conservation of mass states that in a closed system, the total mass of the reactants must be equal to the total mass of the products formed during a chemical reaction. This principle applies to the process of photosynthesis, which involves the conversion of carbon dioxide and water into glucose and oxygen.During photosynthesis, carbon dioxide and water molecules are the reactants, and glucose and oxygen molecules are the products. According to the law of conservation of mass, the total mass of the products (glucose and oxygen) formed must be equal to the total mass of the reactants (carbon dioxide and water) consumed.Option C correctly states this principle, indicating that the total mass of glucose and oxygen formed from photosynthesis is equal to the total mass of carbon dioxide and water used up during the reaction. This statement directly reflects the law of conservation of mass, ensuring that the total mass remains constant before and after the photosynthetic process.The other options either do not consider the masses of all reactants and products or incorrectly pair the masses of different substances, violating the law of conservation of mass.
Which of the following characteristics do all plants have in common? A. unicellular, prokaryotic, heterotrophic B. unicellular, eukaryotic, photosynthetic C. multicellular, prokaryotic, heterotrophic D. multicellular, eukaryotic, photosynthetic
Answer:
D. multicellular, eukaryotic, photosynthetic
Explanation:
I took the test and got it right
The characteristics that all plants have in common are they are multicellular, eukaryotic, and photosynthetic. Therefore, the correct option is D.
What are eukaryotic organisms?Eukaryotic organisms are the organisms which are multicellular and have a well-defined nucleus and other organelles.
Plants are multicellular organisms and are eukaryotic with well-defined membrane bound organisms. They are photosynthetic in nature, which means that they carry out the process of photosynthesis, which is the conversion of solar light to chemical energy for the production of glucose.
They are present under the kingdom Plantae which have cell wall made up of cellulose. They also have chloroplasts, which are centers of photosynthesis. They have specialized reproductive organs to carry out reproduction. Therefore, the correct option is D.
Learn more about eukaryotic organisms, here:
https://brainly.com/question/29760475
#SPJ2
Dams allow a rivers natural power to be converted into useful what
Prokaryotes whose cell walls do not contain peptidoglycan domain
Blood rich in oxygen and nutrients are transported from the placenta to the fetus by the
Structure within a cell that direct with type of protein make
Movement of dissolved substances in fluid from areas of high concentration to areas of low concentration
What is the mortality rate of sickle cell anemia in the africa?
How many megawatt hours (MWh) per year of savings did the students identify for computers at the Penn State Mueller Laboratory Building?
There are 30-megawatt hours (MWh) per year of savings the students had identified for computers at the Penn State Mueller Laboratory Building. At Pennsylvania State University, an undergraduate class studied an environmental evaluation in one of their laboratory buildings in biology. They want to answer the question, "How is this building like an ecosystem?" Their evaluation result was a report that contains 52-page noting ways to lessen the Mueller Laboratory Building’s environmental footprint in terms of water, energy communications, maintenance, renovation, and food usage. The students establish techniques to save an almost $45,500 yearly in the energy cost alone for a building with 123 scientists and backing staff.
Ovulation occurs in the ovary, forming the corpus luteum at the end of this phase. ovulation results in the release of an ovum from the ovary. the remaining follicle becomes a corpus luteum at the end of which uterine phase?
The luteal phase is one of the phases of ovarian cycle (follicular phase and ovulation are the other two). It is the final phase of the ovarian cycle and it corresponds to the secretory phase of the uterine cycle. During this phase, the transformation of the dominant follicle into the corpus luteum is stimulated by pituitary hormones FSH and LH. Corpus luteum produces progesterone which makes the endometrium receptive to implantation of the blastocyst.
Is drinking a beer with double abv like drinking two?
Metastasis is the term used to describe the cancer cell's ability to
How does climate affect the nature and location of tropical rainforests?
What organ system is monetly responsible for generating behavior in multicellular animals?
Nervous system is the organ system that is mostly responsible for generating behavior in multicellular animals. The nervous system coordinates multicellular animal’s behavior and transmits signals within the body. Specific excitatory and inhibitory substances are produced by the nerve cells for them to interact with each other and certain chemicals, sound and light is detected by the sense organs such as ear and nose which control the behavior and movement of multi cellular animals in their environment.
The phenomenon in which rna molecules in a cell are destroyed if they have a sequence complementary to an introduced double-stranded rna is called
a. rna interference.
b. rna obstruction.
c. rna blocking.
d. rna targeting.
e. rna disposal.
Answer: a. rna interference.
Rna interference was known by other names like co-suppression because it has become evident that RNAi has immense potential in inhibiting desired genes by neutralizing targeted mRNA molecules Two types of small ribonucleic acid (RNA) molecules that are central to RNA interference are miRNA and siRNA.
If "quercus" is the genus name and "rubrus" is the species name for a red oak tree, which is the most correct written form of the red oak tree's scientific name?
Using binomial nomenclature, a red oak tree's scientific name should be written as 'Quercus rubrus.' The genus name is capitalized, and the species name is all in lowercase. Both names are typically italicized.
Explanation:In biology, when writing scientific names for organisms, the naming follows the binomial nomenclature format. This involves writing the genus name first followed by the species name. The correct written form, therefore, of the scientific name for a red oak tree would be Quercus rubrus. The genus name starts with a capital letter, the species name should be in lowercase and the whole name should be written in italics.
Learn more about Scientific Name here:https://brainly.com/question/30598476
#SPJ12
Which two chemicals, found in the sting gland, produce a synergistic response when combined?
List two ways that bacteria can produce illness
When human-trafficking victims are children forced to work without pay, it is considered _____.
smuggling
severe
forced labor
sex tourism
Answer:
The answer is option B.
Explanation:
Components of human trafficking. With the end goal of misuse, which incorporates abusing the prostitution of others, sexual abuse, constrained work, bondage or comparative practices and the expulsion of organs.The United Nations characterizes human trafficking as the enrollment, transportation, exchange, harboring, or receipt of people by inappropriate means, for example, drive, snatching, extortion, or pressure for an ill-advised reason including constrained work or sexual misuse.