Explain the evolution of altruism.
Answer:
Altruistic behavior, such as sterile worker ants caring for the offspring of their queen, evolves only between related individuals through what is known as kin selection — or so many evolutionary biologists have thought since the 1960s.
why is DNA a useful form of evidence for developing a phylogenetic tree?
a) DNA never changes
b) DNA is the newest thing in science
c) DNA is passed from generation to generation
Answer:
DNA is useful for a phylogenetic tree because DNA is passed from generation to generation.
the answer;
should be C
HAVE A NİCE DAY
Explanation:
greeetings from Turkey ツ
function of mound layering?
Heavy-stemmed shrubs and trees benefit from mound layering. Cover the main stem by clipping it down to the ground. The buds at the stem's tip will develop into a number of rooted branches. Inside the moss, roots will form, and you can cut the rooted tip from the plant.
PLEASEE NEED HELP ASP
Match each organelle with the main life function(s) it helps the cell perform. Each basic function of life can be used more
than once, and many organelles will have more than one possible answer. Choose one answer only,
Organelle list - nucleus, mitochondria, golgi apparatus, endoplasmic reticulum, ribosomes, lysosomes, vacuoles, cell membrane, chloroplast, cell wall
The answer could either be 1. reproduction 2. interaction with the environment 3. growth 4. uses energy 5. waste production (each function can be used more than once)
Answer:
The correct answer is -
nucleus - reproduction, mitochondria- reproduction, golgi apparatus - waste production, endoplasmic reticulum - growth, ribosomes - growth, lysosomes- waste production, vacuoles - growth, cell membrane - interaction with the environment, chloroplast - uses energy, cell wall - interaction with the environment
Explanation:
A Cell has various organelles with more than one generic function such as the nucleus not just play role in cell reproduction but also plays role in regulating other organelle and cell growth by transcription. Mitochondria produces and provides energy for many functions such as growth, reproduction and substance transport.
Golgi apparatus package proteins and wastes to transfer them out of the cell. The ndoplasmic reticulum modifies the protein produced by ribosomes and helps in growth of the cell. Lysosomes digest waste and cell debris by lysosomal vesicles. Cell membrane and cell wall interact with outer environement.
The DNA of a prokaryote is arranged in a single coiled chromosome located in a region called the ____________ . Some prokaryotes carry genes on extrachromosomal pieces of circular DNA called ____________ .
Answer:
1. Nucleoid
2. Plasmid
Explanation:
Prokaryotes are groups of organisms characterized by the lack of a membrane-bound nucleus in their cell. Due to this, the genetic material (DNA) of prokaryotes are found naked i.e. not housed. The DNA of a prokaryote is arranged in a single coiled chromosome located in a region of the cell called NUCLEOID.
However, some prokaryotes e.g. bacteria carry genes on extrachromosomal pieces of circular DNA called PLASMID. Plasmids carry certain genes like antibiotic resistance genes.
66. A 64-year-old woman, who has always been proud of her suntanned, healthy look, is referred to a dermatologist with a blue-violet, painless, 1.5-cm lump in the skin of her left shoulder. The lump is firm and cannot be moved, and has grown very rapidly over the past few weeks. The mass is removed surgically and the pathologist diagnoses it as a Merkel cell carcinoma. If the UV radiation to which her skin was exposed affected the Merkel cells, what other cell type sharing the same specific epidermal layer might also be affected
Answer:
Basal stem cells for keratinocytes
Explanation:
Keratinocytes are epidermal cells located in the outermost layer of the skin (i.e., the epidermis). Moreover, the cells located in the basal layer of the skin are known as basal keratinocytes or basal cells. These basal cells are proliferative cells that undergo differentiation in order to form suprabasal epidermal layers. Merkel cells are neuroendocrine cells that are located in the basal layer of the skin (scattered among basal keratinocytes), which are attached to surrounding keratinocytes by intercellular junctions called desmosomes.
fungsi vakuol mengecut dalam paramecium
For a reaction, A H= 2 kJ. For which value of TA Sis the reaction spontaneous?
Answer:
option a is the answer I think so
Answer:
option a
Explanation:
For which value of TA Sis the reaction spontaneous?
list few points on the importance of sun in power supply.
Answer:
The sun provides more than enough energy to meet the whole world's energy needs, and unlike fossil fuels, it won't run out anytime soon. As a renewable energy source, the only limitation of solar power is our ability to turn it into electricity in an efficient and cost-effective way.
Answer:
Nothing is more important to us on Earth than the Sun. Without the Sun's heat and light, the Earth would be a lifeless ball of ice-coated rock. The Sun warms our seas, stirs our atmosphere, generates our weather patterns, and gives energy to the growing green plants that provide the food and oxygen for life on Earth.
urine is made of _________
Answer:
Answer is A
Explanation:
Urea consists of carbon, nitrogen and oxygen. You can find it in urine, sweat, blood and milk in mammals. In its most concentrated form, it is urine. Urea is a crystalline compound, and the nitrogen content is always at least 46 percent when dry.
Eukaryotes have three nuclear RNA polymerases. The primary function of RNA polymerase II is transcription of _____.
Answer: the answer is protein-coding genes
(if this is right mark brainliest :))
Eukaryotes have three nuclear RNA polymerases. The primary function of RNA polymerase II is transcription of protein coding genes
what are the function of RNA polymerase ?there are Three different types of RNA polymerases (RNAPs), which transcribe eukaryotic genes, such as RRNA genes are transcribed by RNA polymerase I.
mRNA, miRNA, snRNA, and snoRNA genes are mainly transcribed by RNA polymerase II, while tRNA and 5S rRNA genes are transcribed by RNA polymerase III.
short RNAs as well as the protein coding genes are both transcribed by RNA polymerase II.
A Separate type of RNA polymerases are present in chloroplasts and mitochondria, where they specifically transcribe the DNAs of those organelles.
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When you touch an object that is very hot you quickly pull your hand back. What is the correct pathway of nerve impulses for this behavior?
A. Heat receptors in the hand, sensory neurons, brain, motor neurons, hand muscles.
B. Heat receptors in the hand, motor neurons, hand muscles, sensory neurons, brain.
C. Hand muscles, motor neurons, brain, sensory neurons, heat receptors in hand.
D. Brain, sensory neurons, heat receptors in hand, motor neurons, hand muscles.
A heat receptor>sensory neuron>brain>motor neuron>>hand muscles
Answer:
a
Explanation:
How is an ectotherm most likely to maintain homeostasis during hot weather?
Answer:
The correct answer is - by burrying underground.
Explanation:
In the ecthermal animals who are also known as the cold-blooded animals. These animals change the heat from the environment and exchange through various ways if the weather is too hot.
Evaporating by tounge, moving to a shady area like under a tree or rocks, burrying the ground for the cooling down their body are few of the ways they maintain their homeostasis during hot weather.
how would hemoglobin content differ in a person living in philadelphia compared to someone living in denver
Answer:
The correct answer is - the difference in altitudes.
Explanation:
The hemoglobin in the person of Denver who lives at a higher altitude than the person who lives in Philadelphia will be much higher. This is due to the fact that at higher elevation or altitude atmospheric pressure decreases that causes hemoglobin to stick to the RBCs and that results in less oxygen level in the body.
To compensate for this low level of oxygen levels hemoglobin content need to be higher in people living at a higher elevation.
Genetic drift in a population affects the gene pool in which of the following ways?
decrease in genetic variation
increase in genetic variation
increased in mutations
decreased in gene flow
Answer:
Sometimes, there can be random fluctuations in the numbers of alleles in a population. These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. ... Genetic drift can result in the loss of rare alleles, and can decrease the size of the gene pool.
Genetic drift in a population affects the gene pool by decreasing genetic variation.
What is genetic drift?Genetic drift is a mechanism of evolution that occurs due to random fluctuations in the frequency of alleles (alternative forms of a gene) in a population. It refers to the random changes in the frequency of alleles that occur by chance alone, rather than through natural selection or other selective pressures.
Genetic drift is more likely to occur in smaller populations, where chance events can have a greater impact on the frequency of alleles. The effects of genetic drift can result in the loss of certain alleles from a population over time, or the fixation of one allele in a population, meaning that it becomes the only allele present at that particular gene locus.
Two forms of genetic drift are bottleneck effect and founder effect. In the bottleneck effect, a sudden reduction in population size can cause the loss of genetic diversity, while in the founder effect, a small group of individuals colonizes a new area, leading to the establishment of a new population with a limited subset of the genetic diversity present in the original population.
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In a normal conception (fertilization of egg and sperm), due to the processes crossing over and independent assortment:
Answer: Hello your question is missing below is the intended question
Which of the following supports genetic diversity?
A- Independent Assortment
B-independent assortment and crossing-over support genetic diversity
C-Independent assortment, crossing-over, and fertilization of an egg by sperm support genetic diversity
D-Fertilization of an egg by a sperm
E-Crossing-over
answer :
Independent assortment, crossing-over, and fertilization of an egg by sperm support genetic diversity ( C )
Explanation:
The processes that supports Genetic diversity are ; Fertilization of egg and sperm, Independent assortment and processes of crossing over
Genetic diversity is the simply the variations seen in genetic composition among a population or specie.
Describe how pollution can cause acid rain, and how acid rain affects the ecosystems of surrounding areas?
Pollution specifically air pollution can cause acid. Gases such as sulphur (IV) oxide and Nitrogen (IV) oxide when they are released into the atmosphere and comes into contact with precipitation, that is rain water causes acid rain. Sulphurous acid and Nitric acid is formed thus the rain falls in acidic form.
Acid rain when it falls on the leaves of the flora (plants) causes removal of the green colouring matter (chlorophyll) thus making plants to be deficient of food. Food in plants is made my the process of photosynthesis, removal of chlorophyll in plants kills them due to lack of food.
Also when acid rain finds it's way into the water bodies through surface runoff, aquatic animals such as fishes die due to lack of favourable environment and oxygen deficiency in water. Acidity in the soil also kills important decomposers therefore soil aeration is altered.
what is cell membrane ?
Explanation:
the thin outside layer that surrounds the cytoplasm of a cell and controls the movement of materials into and out of the cell. cell membrane.hope it helps.stay safe healthy and happy....Drag the substances into the correct category
water
Reactants Products
oxygen
energy
carbon dioxide
glucose
Answer: 100% on edge
Reactants:: glucose and oxygen
Products:: carbon dioxide, energy, and water
The type of electromagnetic waves with a longer wavelength than infrared waves are ____.
a) ultraviolet waves
b) gamma rays
c) microwaves
d) visible light waves
Answer:
c.microwaves
Explanation:
This are microwaves because electromagnetic waves with a longer wavelength
In the gragh the y - i tercept of line is
Answer:
In the gragh y-intercept is the point.
Cationic detergents are surface active agents, also known as ______, which damage bacteria by binding bacterial surface proteins and disrupting ______.
Why does the thermosphere increase in temperature as altitude increases?
Answer:
The thermosphere is the outer layer of the Earth's atmosphere, extending from about 53 miles to more than 370 miles above the surface. The temperature increases rapidly in this layer due to the absorption of huge amounts of incoming high energy solar radiation by atoms of nitrogen and oxygen.
Explanation:
Which of the following is NOT part of the circulatory system?
lungs
heart
arteries
blood
what is a skeleton and give two characteristics of a mammal
A skeleton is a structural frame that supports an animal body.
The skeletal system of mammals and other vertebrates is broadly divisible functionally into axial and appendicular portions.
There are two major types of skeletons: solid and fluid. Solid skeletons can be internal, called an endoskeleton, or external, called an exoskeleton, and may be further classified as pliant (elastic/movable) or rigid (hard/non-movable).
Fluid skeletons are always internal.
The presence of hair or fur.
A four-chambered heart.
Answer: well I know the skeleton is the bone structure in some living organisms if there a vertebrate
Mammals are a large group of animals that includes humans, apes, dolphins, bears, bats, cats, and much more. Which statement can be made about this information? All mammals use echolocation to find food. Some mammals use echolocation to avoid obstacles. All mammals use walking as their primary means of transportation. Some mammals need to find food to survive.
Answer: B
Explanation:
Just did the test
The statement that can be made about the information is: "Some mammals need to find food to survive."
What are Mammals?Mammals are a diverse group of animals that are found all over the world and come in many different shapes, sizes, and types.
All mammals share certain key characteristics, including the fact that they are warm-blooded, have hair or fur, and feed their young with milk produced by their mammary glands.
While the information given in the first sentence provides a list of mammals, it does not provide any information about their specific behaviors or characteristics, such as the use of echolocation or means of transportation.
However, the statement that "some mammals need to find food to survive" is true for all mammals, as food is a basic necessity for the survival of all members of this animal group.
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Describe the sliding filament model of muscle contraction. What role do acetylcholine and acetylcholinesterase play in muscle contractions
Answer:
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Explanation:
Hey (☞ﾟ∀ﾟ)☞ It's the Explanation Wizard here for your troubles I don't wanna waste time so here is my answer+explanation that I have personally wrote for you.The first question you asked here's the a+e The sliding filament model describes the process used by muscles to contract. It is a cycle of repetitive events that causes actin and myosin myofilaments to slide over each other, contracting the sarcomere and generating tension in the muscle. second a+e for second question When the nervous system signal reaches the neuromuscular junction a chemical message is released by the motor neuron. The chemical message, a neurotransmitter called acetylcholine, binds to receptors on the outside of the muscle fiber. That starts a chemical reaction within the muscle. Explanation Wizard out
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What is the definition of specific heat capacity?
O A. The amount of heat required to break the chemical bonds in 1 g of
a substance
B. The amount of heat required to form 1 g of a substance from its
elements
C. The amount of heat required for 1 g of a substance to undergo a
phase change
D. The amount of heat required to raise the temperature of 1 g of a
substance by 1°C
Option D is the correct option..
D. The amount of heat required to raise the temperature of 1 g of a
substance by 1°C
what a meteor is called before it enters Earth’s atmosphere
Answer:
A meteor, before entering earth's atmosphere is known as a meteoroid
