The currently recognized classification scheme is the five - kingdom system.
The five kingdom classification involves the grouping of living organisms into classes such that organisms in each class share similar characteristics such as : reproductive process, homeostasis, growth, mode of nutrition, cell structure and so on.
The five kingdom classes include :
Kingdom Monera
Kingdom protista
Kingdom plantae
Kingdom Fungi
Kingdom Animalia.
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Which of the following is true?
A. Parasitism is a density-dependent limiting factor.
B. Population size is a density-independent limiting
factor.
C. Season cycles are not considered a potential
limiting factor.
1. A stream dries up. Did the water in the stream:
a. gain energy
b. loose eergy
c. keep the same amount of energy
d. never had energy
Explain your answer.''
A fish maintains its depth in fresh water by adjusting the air content of porous bone or air sacs to make its average density the same as that of the water. Suppose that with its air sacs collapsed, a fish has a density of 1.18 g/cm3. To what fraction of its expanded body volume must the fish inflate the air sacs to reduce its density to that of water?
Answer:
0.153
Explanation:
We know the up-thrust on the fish, U = weight of water displaced = weight of fish + weight of air in air sacs.
So ρVg = ρ'V'g + ρ'V"g where ρ = density of water = 1 g/cm³, V = volume of water displaced, g = acceleration due to gravity, ρ'= density of fish = 1.18 g/cm³, V' = initial volume of fish, ρ"= density of air = 0.0012 g/cm³ and V" = volume of expanded air sac.
ρVg = ρ'V'g + ρ"V"g
ρV = ρ'V'g + ρ"V"
Its new body volume = volume of water displaced, V = V' + V"
ρ(V' + V") = ρ'V' + ρ"V"
ρV' + ρV" = ρ'V' + ρ"V"
ρV' - ρ"V' = ρ'V" - ρV"
(ρ - ρ")V' = (ρ' - ρ)V"
V'/V" = (ρ - ρ")/(ρ' - ρ)
= (1 g/cm³ - 0.0012 g/cm³)/(1.18 g/cm³ - 1 g/cm³)
= (0.9988 g/cm³ ÷ 0.18 g/cm³)
V'/V" = 5.55
Since V = V' + V"
V' = V - V"
(V - V")/V" = 5.55
V/V" - V"/V" = 5.55
V/V" - 1 = 5.55
V/V" = 5.55 + 1
V/V" = 6.55
V"/V = 1/6.55
V"/V = 0.153
So, the fish must inflate its air sacs to 0.153 of its expanded body volume
True or False. Only animals have adaptations that better allow them to survive and reproduce, flowers do not.
Answer:
false
Explanation:
PLEASE HELP! I WILL GIVE BRAINLIEST. Explain the process of succession.
Answer: Succession is a series of changes in the composition of an ecological community over time.
Explanation:
i hoped this helped
okra seed contains reserve food which is stored in...
A. seed coat
B. seed leaves
C. embryo
D. seed scar
Answer: For my knowledge of most plants, I'm pretty sure it's C., embryo.
Explanation: . . .
PLEASE HELP!!!! WILL GIVE BRAINLIEST!!!!!!
Answer:Nucleotide
A nucleotide consists of a sugar molecule
what are the tropical rainforest dominant animals(biotic)
Answer:
The most dominant animal species found in a tropical rainforest are mammals and birds that have adapted to a life in the trees. In a tropical rainforests you can see anything from a chimpanzee to a jambu fruit dove.
Explanation:
What does dna turn into?
Answer:
rna
Explanation:
it turns in rna and I do t wanna type more
Which of these organisms is NOT made from eukaryotic cells
A. Amoeba
B. Lion
C. Fungi
D.pine tree
E.bacteria
Answer:
E. Bacteria
Explanation:
Bacteria are made of prokaryotic cells
In 1976, an outbreak of pulmonary infections among participants at an American Legion convention in Philadelphia led to the identification of a new disease, Legionnaire's disease. The bacterium responsible for the disease had never before been known to be pathogenic. From your knowledge of bacterial genetics, can you postulate how it might have acquired the ability to cause disease
Answer:
Evolution.
Explanation:
It might have acquired the ability to cause disease due to evolution. Due to evolution, the harmless bacteria can turn into infectious pathogens that cause diseases. Evolution is the change in the characteristics of a species over several generations due to the process of natural selection. This evolution in the bacteria occurs due to changing of environmental conditions which changes the genetic makeup of that harmless bacteria and turn into infectious pathogen.
Which of these actions is likely to spread pathogens in the environment?
Cupping mouth while coughing
Touching wounds
Wiping door knobs
Washing fruits
Answer:
Touching wounds
Explanation:
Covering your mouth when coughing will prevent the spread of germs. So will wiping doorknobs and washing fruit. When touching wounds, you can spread pathogens on your hands into the wound. So, the answer is B, touching wounds.
Good luck ^^
How does climate change affected plants and animal species on earth?
Answer:
Humans and wild animals face new challenges for survival because of climate change. More frequent and intense drought, storms, heat waves, rising sea levels, melting glaciers and warming oceans can directly harm animals, destroy the places they live, and wreak havoc on people's livelihoods and communities.
Explanation:
hope this helps you
give me some ideas...pls
Answer:
my personal hypothesis:
1. the mosquitos dwell mainly at the shore of the lake and is born there
2. if mosquitos dwell and are born at the shore of the lake
3. The mosquito may lay there eggs in the lake shores and hatch there.
Explanation:
I’ll mark u as brainliest!
Answer:
39 purple stemmed plants
39 green stemmed plants
Explanation:
You'll end up with half and half! :)
2. What does it mean for your body to be out of homeostasis?
Answer:
If homeostasis is disrupted, it must be controlled or a disease/disorder may result. Your body systems work together to maintain balance. If that balance is shifted or disrupted and homeostasis is not maintained, the results may not allow normal functioning of the organism.
Explanation:
Which of the following describes the relationship between genes and chromosomes?
Select one:
Every gene an organism has is found on every one of its chromosomes.
Genes are special sequences of nucleic acids found on chromosomes.
All of an organism’s chromosomes can be found next to its genes in the cell nucleus.
Chromosomes form into genes during cellular reproduction.
Answer:
Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.
Explanation:
2. The diagram below represents a food web composed of producers, consumers, and
decomposers.
A
B
D
Which group would represent the decomposer organisms?
1) A
2) B
3) C
4) D
Answer:
B
Explanation:
because that is the 2nd decompers
B group would represent the decomposer organisms. Therefore, the correct option is B.
What are Decomposers?Decomposers are organisms that convert decaying organic matter into more basic components. They are an important component of the nutrition cycle because they convert complex chemical substances, such as nitrogen and carbon, into direct nutrients that can be absorbed by plants and other living things.
Some species of bacteria, fungi and insects are specialized decomposers. These organisms are essential to maintaining healthy soil because they aid in the recycling of nutrients and the breakdown of organic matter, which would otherwise build up and cause nutrient imbalances. Decomposers, which break down dead organisms and aid in the containment of pathogens, may be important in disease prevention.
Therefore, the correct option is B.
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Use your knowledge of Earth’s rotation, revolution, axial tilt, direct sunlight, indirect sunlight, and the atmosphere to complete a diagram and explain in detail, using evidence, why Earth’s seasons occur.
Freshwater ecosystems can be grouped as those that are still, those that are flowing, and those that contain salt.
Answer:
true
Explanation:
Which biome is characterized by very low temperatures, little precipitation, permafrost and plants that adapted to be short in height with broad roots systems in order to gain enough water from the dry areas?
Answer:
tundra
Explanation:
In 1980, Mt. St. Helens erupted. The resulting lahar flowed over a wide area of the Cascade Mountains. Which of these statements DOES NOT describe the effect of the volcanic eruption?
A. It affected the living and nonliving components of the ecosystem.
B. It removed populations of mammals from the mountainside.
C. It led to succession on the mountainside.
D. It affected only nonliving components of the ecosystem.
Correct answer is C
Have a great day!
What kingdom is made of organisms that are eukaryotic, plant-like, do not move, and do not carry on photosynthesis?
Answer:
protists
Explanation:
Answer:
Protists are organisms that are part of the biological kingdom called the protista. These organisms are not plants, animals, bacteria, or fungi. Protists are a very diverse group of organisms. They are basically all the organisms that don't fit into the other groups.
Explanation:
Please select the word from the list that best fits the definition
plants that require short nights to flower
long-day plants
gibberellins
stimulus
cytokinins
day-neutral plants
photoperiodism
short-day plants
abscisic acid
tropism auxin
photosynthesis
respiration
Answer:
long-day plants
gibberellins
stimulus
cytokinins
day-neutral plants
photoperiodism
short-day plants
abscisic acid
tropism auxin
photosynthesis
respiration
There is a population of alien dogs, species Dogus Cute-ee-us, that live on the planet Woof. Their genomes and biology are amazingly identical to the genomes and biology of earth dogs. Consider a di-hybrid cross, where the first locus has alleles A and a, and second locus has alleles B and b. Each additional copy of either an A or B allele in the two-locus genotype increases the friendliness of the dog. Friendliness is measured by the Wilcoxon-Canus Amicus Diagnostic Scale (WCADS). There are five categories:
0 = Unfriendly/Loner (although not aggressive);
1 = Somewhat friendly/shy;
2 = Friendly;
3 = Very friendly;
4 = Maximally friendly.
For example, an alien dog with a two-locus genotype of Aabb would have a Somewhat friendly/shy behavior, since there is one copy of A and zero copies of B, adding to a score of 1 for the WCADS. Similarly, an alien dog with a two-locus genotype of AaBB has a Very friendly behavior (one copy of A + two copies of B = three copies total of A or B).
In the following mating: AaBb x AaBb, what is the expected ratio of Maximally friendly:Very friendly:Friendly:Somewhat friendly:Unfriendly alien dogs in the offspring, assuming the parents produce a very large litter?
a. 0:1:1:1:0
b. 1:2:3:2:1
c. 1:4:6:4:1
d. 9:3:3:1
Answer:
c. 1:4:6:4:1
Explanation:
The term quantitative heritability refers to the transmission of a phenotypic trait in which expression depends on the additive effect of a series of genes.
Polygenic heritability occurs when a trait results from the interaction of more than one gene. And these genes can also have more than two alleles. The action of many genes and alleles can cause many different combinations that are the reason for genotypic graduation.
Quantitative traits are those that can be measure, such as longitude, weight, eggs laid per female, among others. In the exposed example, the measurable trait is the dog´s friendliness. These characters do not group individuals by any precise and clear categories. Instead, they group individuals in many different categories that depend on how the genes were intercrossed and distributed during meiosis. The result depends on the magnitude in which each allele contributes to the final phenotype and genotype. When they interact, they create a gradation in phenotypes, according to the level of contribution.
In the exposed example, each dominant allele contributes with a higher level of friendliness.
aabb → 0 = Unfriendly/Loner (although not aggressive); Aabb, aaBb → 1 = Somewhat friendly/shy; AAbb, AaBb, aaBB → 2 = Friendly; AABb, aABB → 3 = Very friendly; AABB → 4 = Maximally friendly.Cross: between two dihybrid friendly dogs
Parentals) AaBb x AaBb
Gametes) AB, Ab, aB, ab
AB, Ab, aB, ab
Punnett square) AB Ab aB ab
AB AABB AABb AaBB AaBb
Ab AABb AAbb AaBb Aabb
aB AaBB AaBb aaBB aaBb
ab AaBb Aabb aaBb aabb
F1) 1/16 AABB ⇒ 4 = Maximally friendly
4/16 AABb + AaBB ⇒ 3 = Very friendly
6/16 AAbb + AaBb + aaBB ⇒ 2 = Friendly
4/16 Aabb + aaBb ⇒ 1 = Somewhat friendly/shy
1/16 aabb ⇒ 0 = Unfriendly/Loner
The Phenotypic ratio is 1:4:6:4:1
A child falls off a bike and skins a knee. Which systems work together to heal the wound?
O Integumentary, Immune, and Circulatory
Respiratory, Immune, and Digestive
O Integumentary, Immune, and Excretory
O Nervous, Immune, and Endocrine
Answer:
A
Explanation:
1. Which of the statements below best describe marketing?
A. Bringing products to the costumers' knowledge and attention
B. Bringing products to food preparation
C. Bringing products to factory owners
D. Bringing products to the packaging
Answer:
A is the answer I hope you get it correct
Which of the following defines an ecological succession? A.It is the final and stable commuity of an ecosystem. B. It is the first plants and animals to inhabit a newly available ecosystem. C. It is the number of a particular species that an ecosystem can support. D.It is a process of chang during which species in a community are established or replaced.
Answer:
D. It is a process of change during which species in a community are established or replaced
Explanation:
Ecological succession is a process that occurs when a community is being established or replaced.
It shows the change in community over time, focusing on the types of plants and the maturity of plants that are in the community.
Primary and secondary succession are the two types of succession. Primary succession shows the process of change in the establishment of a community. Secondary succession shows the change when a community is being replaced.
So, the correct answer is D. It is a process of change during which species in a community are established or replaced
Which will form an ionic bond?
A. Two oxygen atoms
B. Two oppositely-charged ions
Ο Ο Ο
C. Any two neutral atoms
D. Two negative ions
Option B- Two Oppositely-Charged Ions
Hope This Helps You ❤️Immunization with the childhood DPT (diphtheria, pertussis, and tetanus) vaccine protects against subsequent exposure to tetanus by Group of answer choices generating tetanus-specific memory B cells. producing life-spanning antitetanus IgE antibodies. stimulating quick inflammation upon future exposure. preloading antigen-presenting cells. stopping isotype switching of B cells from IgM to IgA.
Answer:
generating tetanus-specific memory B cells
Explanation:
Memory B cells are cells of the immune system that produce antibodies against specific antigens present in pathogenic organisms. The B lymphocyte cells produce clonal memory B cells after the first exposure to the antigen, a process known as clonal selection. Subsequently, memory B cells that circulate in the bloodstream trigger a rapid secondary immune response (after a second exposure to the antigen) by producing antibodies against specific antigens that activated their parent B cell. Moreover, the DPT vaccine includes purified tetanus toxins (i.e., target antigens) that induce clonal expansion in specific B cells, thereby generating a population of memory B cells that produce specific antibodies rapidly in secondary immune responses.