Answer:
The options are not complete because the answer is neither i or ii
spleen is a secondary lymphoid organ
the correct answer is Bone marrow and thymus
What is thWhich is a structure that directs the cell's activities?e basic unit of structure and function of all living organisms?
The nucleus is the structure that directs the cell's activities of living organisms.
What is Nucleus?This is an organelle which is usually membrane bound and contains the chromosomes.
It is involved in the control of the synthesis of proteins thereby aiding the directing of the cell activities.
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Need help on this question
Answer:
the answer is B. Antigenic drift
which of these should be reportable reasons to protect public health?
a) Skin cancer
b) Heart disease
c) HIV
d) Diabetes
Among the following HIV should be reportable reasons to protect public health.
HIV impairs the body's defenses against infections and leads to AIDS. Contact with contaminated blood, or fluids might result in the virus being spread. Flu-like symptoms including fever, sore throat, and exhaustion might appear a few weeks after HIV infection. Until AIDS develops, the illness is typically asymptomatic. Fatigue, fever, night sweats, and weight loss are a few of the signs and symptoms of AIDS. Despite the fact that there is no known treatment for AIDS, diligent adherence to anti-retroviral therapy (ART) can significantly decrease the disease's progression, avoid complications and secondary infections, and lengthen life. One of the primary tactics used in the prevention and control of HIV/AIDS around the world is the dissemination of information and awareness about HIV.
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Two fully heterozygous fruit flies are crossed. Complete the Punnett square and provide the probabilities for the genotype and phenotype for the offspring.
B= brown body
b= black body
E= red eyes
e= brown eyes
Please provide the probability in percentages
Fill in the blanks using the show your work tools
Answer:
Blanks in the boxes (left to right, top to bottom, as you would read)
BbEE
BbEE
BbEe
bbee
Genotypes (top to bottom blanks):
12.5%
6.25%
6.25%
Phenotype (top to bottom blanks):
56.25%
18.75%
18.75%
In this type of passive transport, materials may have their movements helped by membrane proteins.
Facilitated diffusion
Simple diffusion
Simple diffusion
Exocytosis
Answer:
Facilitated diffusion
Explanation:
Diffusion across a membrane, along a concentration gradient via membrane protiens. No energy is required hence passive.
Greenhouse gases
a) keep earth cool
B)absorb heat From the sun
C) Are only produced naturally
d) Trap Ozone At earths surface
Answer:
greenhouse gases produce or a heat from the sun bringing about global warming
The formation of the many kinds of body cells that make up an embryo begins with
The formation of multicellular organisms commences with a single-celled zygote, which divides rapidly to form the blastula. Cleavage refers to the rapid, multiple shots of cell division.
What is an embryo?Following conception, the baby enters the embryonic stage, a period of radical shift.
This stage lasts from the fifth to the tenth week of pregnancy. During a certain stage, the baby is referred to as an embryo. Several changes take place even during embryonic stage.
The primary distinction between an egg and an embryo is that an embryo is formed after the gametes are fertilized, whereas an egg is extracted from the ovary and stored in a freezer prior to fertilization.
Thus, multicellular organisms begin with a single-celled zygote that divides speedily to form the blastula. Cleavage is a term that refers to rapid, multiple strikes of cell division.
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Answer:2
Explanation:because lk
The cichlid is a colorful fish found in freshwater lakes. There are over a thousand species of cichlid fish today. If a species of cichlid became extinct, the niche the fish filled within the ecosystem would be left open. Explain how an available niche after extinction can lead to speciation.
An available niche after extinction can lead to speciation because it allows the emergence of genetic variation in other competing species.
What is speciation?Speciation is a slow process associated with the emergence of reproductive isolation barriers in a population.
These barriers lead to the absence of gene flow and eventually to the emergence of new species.
In conclusion, an available niche can lead to speciation in other competing species.
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NAD+ is a limiting factor in glycolysis. In the absence of ____________________ the conversion of (1) ____________________ to NAD+ via the ______________________________ is prevented from happening.
In the absence of ADP, the conversion of NADH to NAD+ via the electron transport chain is prevented from happening.
What is glycolysis?Glycolysis is the series of reactions by which glucose is broken down to pyruvate by the body.
NAD+ is a limiting factor in glycolysis. In the absence of ADP, the conversion of NADH to NAD+ via the electron transport chain is prevented from happening.
In conclusion, NAD+ is a limiting factor in glycolysis.
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During and after photosynthesis, energy changes from one form to another in a series of steps. Which step related to this energy transformation occurs second?
The step that relates to the energy transformation in photosynthesis is respiration.
What is respiration?Respiration is the process whereby the chemical energy locked up in carbohydrates is unlocked into another energy form that is usable to living organisms.
In other words, chemical energy in carbohydrates is converted to ATP. This process can take place with (aerobic respiration) or without (anaerobic respiration) oxygen.
Carbohydrates are primarily generated from photosynthesis by green plants.
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Classify the following organisms as eubacteria,archebacteria, Protists,fungi or other
Eubacteria and archaebacteria are organisms from the Archaea domain, whereas protists and Fungi belong to the Eukarya domain.
What are prokaryotic organisms?Prokaryotic organisms such as eubacteria (E coli) and archaebacteria (methanogens) are unicellular microorganisms whose cells do not have a cell nucleus.
Conversely, eukaryotic cells such as protists (giardia lamblia) and fungi (Yeast) have the genetic material inside the cell nuclei and membrane-bound organelles.
In conclusion, eubacteria and archaebacteria belong to Archaea, whereas protists and Fungi belong to Eukarya.
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A tonicity with a high concentration of solutes is said to be _________. hypertonic isotonic selectively permeable hypotonic
Answer:
Hypertonic
Explanation:
A tonicity with a high concentration of solutes is said to be Hypertonic.
I hope it helps! Have a great day!
Pan~
Tonicity with a high concentration of solutes is said to be hypertonic.
Tonicity is the ability of an extracellular solution to allow the movement of water in and out of the cell by osmosis. The terms hypertonic, isotonic and hypotonic decide the movement of water into or out of the cell.
The hypertonic solution is a kind of solution which has a high concentration of solutes (salts, electrolytes). In Biology, a cell is said to be in a hypertonic solution if the outside solution has a high concentration of solutes than the inside the cytoplasm of the cell. In this situation, there will be a net flow of water out of the cell.
The hypotonic solution is a type of solution which has a low concentration of solute. ). In Biology, a cell is said to be in a hypotonic solution if the outside solution has less concentration of solutes than the inside the cytoplasm of the cell. In this situation, there will be a net flow of water into the cell.
Isotonic solution is one which has the same concentration of water and solutes as inside the cytoplasm of a cell. If a cell is placed in an isotonic solution, there is no net water movement.
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What have you learned about the burying beetle and other insects that make them important to “The Natural World”?
Answer: Burying beetles are true to their name—they bury the carcasses of small vertebrates such as birds and rodents as a food source for their larvae.
Explanation:
they are on the endangered species list
jane goodall said that they are "nature's most efficient recyclers."
The American burying beetle is one of nature's most efficient recyclers, feeding and sheltering its own brood while returning nutrients to the earth to nourish vegetation and keeping ant and fly populations in check.
populations of prairie chickens and passenger pigeons have been reduced by the loss of the burying beetle.
biologicaldiversityorg
quizlet
3. What does the name protozoa mean?
first organism
first animal
first cell
first microbe
During transcription, mRNA is produced from the antisense strand of DNA. This means that the mRNA will match the
please answer only if you are sure
A)
antisense strand of DNA, substituting thymine for uracil.
B)
antisense strand of DNA, substituting uracil for thymine.
C)
sense strand of DNA, substituting uracil for thymine.
D)
sense strand of DNA, substituting thymine for uracil.
Answer:
C) sense strand of DNA, substituting uracil for thymine.
Explanation:
The antisense strand matches the sense strand. Thymine is only used in DNA while Uracil is only used in RNA.
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Which organelle is responsible for producing the energy for cellular processes?
organelle A
organelle E
organelle F
organelle G
Organelle G which is the mitochondrion is responsible for producing the energy for cellular processes.
What is Mitochondrion?This is referred to as the power house of the cell as it is the area where ATP(energy) is produced.
The energy is produced through aerobic respiration which is then used for various forms of activities by the cells.
The complete question is:
Consider this animal cell mc 006 - 1. jpg. Which organelle is responsible for producing the energy for cellular processes?
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Classify the following organisms as eubacteria, archebacteria, protists, fungi or other
A. Eubacteria coli
B. Plasmodium
C giardia lamblia
D. adenovirus
E. Methanogens
F. Lichen
G. Yeast
The correct class of the following organisms is as follows:
Eubacteria -:E coliProtist- PlasmodiumProtist- Giardia lambliaOther- adenovirus Archaebacteria - MethanogensFungi - LichenFungi- yeastWhat is a domain in biology?Domain refers to the highest rank in the classification of organisms, above kingdom.
The three-domain system are as follows:
EubacteriaArchaeaEukaryotaThe correct class of the following organisms is as follows:
Eubacteria -:E coliProtist- PlasmodiumProtist- Giardia lambliaOther- adenovirus Archaebacteria - MethanogensFungi - LichenFungi- yeastLearn more about domain at: https://brainly.com/question/24779457
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PLEASE ANSWER QUICK
What is the renewability of geothermal power?
It is a nonrenewable energy source.
It is an unlimited, clean energy source.
It can be replenished by splitting nuclei.
It can use the same fuel cells repeatedly.
A sample of the element boron will have some atoms with six neutrons and some atoms with five neutrons; collectively, these atoms are called
OA. cations.
OB. anions.
OC. isotopes
OD. ions
Answer: OC. Isotopes
Explanation: Isotopes of element are those who have same numbr of protons but different number of neutrons. Here number of neutrons are different so these atoms are isotopes.
THINKING
1. A protease which is protein in nature:
A. Lipase
C. Gastrin
B. Enterokinase
D. Amylase
Answer: D. Amylase
Explanation:
Amylase is a enzyme that breaks down protein present in food.
The lens of a person's eye becomes thinner as the person watches a train leave. This is an example of _________________________.
Answer:
Refraction
Explanation:
The lens is pulled thin, allowing the light rays to refract slightly.
What country often experiences the first and worst effects of El Nino, including flooding and destruction of villages?
A. India
B. Japan
C. United States
D. Peru
Peru is the country that often experiences the first and worst effects of El Nino, including severe flooding.
El Nino is a climatic pattern which describes the unusual warming of surface waters and it is part of a larger phenomenon called 'El Nino - southern oscillation (ENSO)'.
ENSO includes the El Nino and La Nino, the warm phase and cool phase respectively. El Nino occurs irregularly at two - seventy years intervals.
El Nino events are indicated by the increase in sea surface temperature by 0.9 Fahrenheit for at least five successive three months intervals.
El Nino has devastating impacts on the Peruvian and Ecuadorian economies. They cause an increase in precipitation which results in a drastically increased rainfall contributing to coastal flooding and erosion. It also destroys buildings, crops and limits transportation.
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Select the possible energy sources for muscle contraction from the list.
•actin myofilaments
•blood glucose
• muscle glycogen
•glucagon
The possible energy sources for muscle contraction from the list include:
Blood glucoseMuscle glycogen.What is Energy?This is referred to as the ability to do work and the major fuel in the body is referred to as glucose.
Glycogen in muscles also acts as a fuel although its synthesis is usually very slow.
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Claim and evidence:
What would happen to the effectiveness of an original vaccination if a mutation in the virus caused the protein spike to change ?
Make a claim that answers the question, then support that claim with evidence. What did you learn about mutations that would support your claim ?
Answer__________________
______________________
____________________
________________________
____________
It would happen that the effectiveness of an original vaccine could become less if there was a mutation in the virus that caused the protein spike to change because the antibodies created would not be specific for the new virus.
What would happen to the mutated virus?Vaccines trigger an immune response to fight disease-causing organisms, a mutation in the virus to be fought would change the effectiveness of this immune response, as the specificity would not be the same with the mutant virus.
With this information, we can conclude that The immune response would not be specific for the new virus that caused the protein spike to change.
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what is this a picture of
watershed
wetland
sinkhole
Answer:
it's a watershed
Explanation:
basically it's a channel that drains/carries runoff to a common point like the lake in the picture. water, sediment, and other materials are carried by the river to the lake.
20 POINTS - AP Biology
In a certain population of rats....
The predicated frequency of homozygous dominant rats at are: 0.11 (Option A). See the explanation below.
What is a homozygous dominant rat?A homozygous organism has two copies of the same allele for a gene.
If an organism has two copies of the same dominant allele, it is homozygous dominant; if it has two copies of the same recessive gene, it is homozygous recessive.
What is the justification of the above answer?
Note that the total population of rats is: 200
Number of rats with brown fur = 112
The frequency of brown fur rats thus,
112/200
= 0.56
Note that it is also stated that the brown fur rats are dominant in relation to the gray fur rats. Thus, in accordance to Hardy Weinberg's equation, the frequency of the dominant rats is depicted as: p²
Thus:
p² + 2pq = 0.56
Hence, the frequency of the the Homozygous recessive gray rats is given as:
p² + q² + 2pq = 1
q² = 1 - 0.56
q² = 0.44
q = 0.663
P = 1-q
= 1 - 0.663
= 0.337
Thus the frequency of the homozygous dominant rats is:
p²
= 0.337²
= 0.1135
≈ 0.11
Therefore the correct answer is A.
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True or false? Mendel's inheritance laws hold true for all types of inheritance in humans.
O True
O False
Answer:False
Explanation:
Mendel' s law of independent assortment does not hold true for the genes that are located closely on. A. Same chromosome. B. Non-homologous chromosomes.
While most other organisms obtain energy from food, plants get their energy from the sun. Would you support research to genetically modify humans to be able to use photosynthesis for part of our energy and reduce the amount of food we need?
I need 3-5 sentence answer.
No, I won't support research to genetically modify humans to be able to use photosynthesis for part of our energy and reduce the amount of food we need.
What is Photosynthesis?This is the process in which green plants manufacture their food in the presence of sunlight.
The research won't be supported as a result of the absence of the digestive system to suit the product and reducing amount of food needed will lead to wastage.
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Complete the punnet square.
If we were to cross a heterozygous mouse with a homozygous recessive mouse, what would the probability of offspring genotypes be ?
Fill in the PERCENTAGE of the probability for EACH GENOTYPE on your show your work worksheet .
The probability of the offspring will be 50%, 50%, and 0% respectively.
Probability in geneticsIt seems the allele for the trait in question is F(f) from the image.
One parent is heterozygous while the other is homzygous.
Ff x FF
FF FF Ff Ff
Probability of FF = 2/4 or 50%
Probability of Ff = 2/4 or 50%
Probability of ff = 0
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The percentage of each genotype is;
Ff = 50%ff = 50%What is a cross?A cross is a system by which the genotype of an organism can be ascertained.
We are told that this cross is between a het--erozygous mouse with a hom--ozygous recessive mouse. Thus we have Ff and ff.
We now have the percentage of each genotype as;
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A person with a traumatic brain injury now exhibits some symptoms including
erradic, impulsive behavior, worse judgement than usual of risky situations, and odd
social behaviors and violent mood swings. Based on these symptoms, which area of
the brain was most likely invovled in the injury?
A. Temporal lobe
B. Cerebellum
C. Frontal lobe
D. Thalamus
Answer:
C. Frontal lobe
Explanation:
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The frontal lobe of the brain, behind the forehead, is strongly associated with motor function, spontaneity, impulsive behavior, judgement decisions, and social behaviors and mood.