The correct descriptions that help to define luminosity are How much energy is emitted per second, How much surface area the object has, and The amount of brightness of an object.
What is the energy content of luminosity?An object's luminosity, which is the quantity of energy it emits over a predetermined period, is a measurement of its inherent brightness. Since it simply measures the object's power output, it can be expressed in units like Watts.
What factors affect luminosity?A star's luminosity, or the total amount of energy it emits each second, is determined by two factors: The stellar photosphere's "Effective Temperature," T. the star's total surface area, which is influenced by its radius, R.
What three things have an impact on luminosity?The size, temperature, and distance of a star are the three variables that determine how bright it seems to us on Earth. The brilliance of a star is measured by its magnitude.
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the algae at the beginning of the food chain is a_______.
a consumer
b decomposer
C producer
d heterotroph
Answer:
c
Explanation:
yep
How is the scale of objects used when scientists create models of real world phenomenon and why is it important?
Answer:
To compare things.
Explanation:
The scale of objects used by scientists to create models of real world phenomenon because the scales helps the scientists to show the difference between objects and their effect on one another that contributes in the process or phenomenon. It is important because it helps us to make accurate models to understand the process or phenomenon that is related to the real world.
The width of the labelled cell in Figure 4 is 6 mm. The cell has been magnified 750 times.
Calculate the actual width of this cell in mm.
Give your answer in standard form.
Answer:4,500
Explanation:6mm times 750 equals 4,500
What is a prokaryote?
Question 3 options:
organism that does have a nucleus
organism that does not have a nucleus
organism that is multicellular
Answer:
a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles. Prokaryotes include the bacteria and cyanobacteria.
Explanation:
Please help me
Please
Answer:
a
Explanation:
because i think so dont quote me on that though
What does a nucleus do in a cell?
Answer:
The nucleus is known as the brain of the cell, it is the organ of the cell that controls all the cell activities like growth, metabolism, etc. it carries genes, structures that contain hereditary information.
Help me with this please
Answer:
1. b
2. a
3. a
4. b
5. b
6. a
7. a or b (they're the same)
(Punnett square and chart attached)
Explanation:
1. The father is a non-roller, as was given in the question. Remember that a phenotype is the physical trait displayed by an organism.
2. In order for the father to be a non-roller, the recessive non-roller allele would have to be expressed. In order for this to happen, he would need two recessive alleles.
3. The gene for tongue rolling is dominant, so if the mother is heterozygous (she has one dominant allele and one recessive allele), then she will be a tongue roller.
4. The mother has a dominant allele and a recessive allele.
5. 50% of the offspring have the Rr genotype and 50% have the rr genotype. This means that there is a 50% of having a tongue-rolling child and a 50% chance of having a non-rolling child.
6. Because the possibility of the offspring having either genotype is 50/50, the ratio would be written as 1:1. Both outcomes are equally likely.
7. Because the possibility of the offspring having either phenotype is 50/50, the ratio would be written as 1:1. Both outcomes are equally likely.
AAAAAAAA
I’ll mark u brainly!
1. Phytoplankton, krill, fish, penguin
2. Baleen whale, smaller toothed whale
3. krill
4. the phytoplankton are the producers, they make their own food from the sunlight just as plants do.
5. herbivorous zooplankton, phytoplankton
6. One type is a herbivore it snacks on plants. The other type is a carnivorous type of zooplankton it eats smaller animals.
7. Draw a pyramid with several layers. at the bottom write phytoplankton. above that layer write zooplankton, not the carnivorous type. above that write 1st level carnivorous consumers, such as the fish, krill, other birds, and small squid. above that write 2nd level carnivores like the leopard seal, penguin, and elephant seal. Then above that write Baleen whale, smaller toothed whale, and a sperm whale.
The process of evolution, or genetic change over time, has resulted in the wide variety of living things that exist today. What part do mutations play in the evolution of species
Answer:
Evolution has occurred thanks to many random changes in the DNA base sequence that we call mutations. This is caused by errors in the genetic information contained in the cells - due to chemical or physical factors - and also its subsequent propagation by replication, being transcendent for evolution those that will later be transmitted to the offspring: somatic cells if reproduction it is asexual and the gametes if it is sexual. For this reason, we say that mutations are the primary source of gene variability, essential for evolution to exist. Thus, without mutations, the genetic variability that natural selection needs would not be present - in addition, such diversity is important for the population to more successfully mold (or adapt) to continuous environmental changes.
Explanation:
A mutation is a change in the information contained in the DNA of cells. The DNA of an organism influences all aspects of its life. Therefore, a change in the DNA of an organism can produce changes in all aspects of its life. The mutation increases the genetic variability of the species and contributes to the adaptation of the species to the environment and to their evolution. Viability and fertility are associated with adaptation, the total capacity of an organism to survive and reproduce. The effect of a mutation in any generation is minimal, but over time a considerable amount of variation from mutations can accumulate. Most mutations are harmful and their carriers die, but those that produce an improvement remain in the species and are essential in the evolutionary process. When mutations appear in a certain population, the genotype changes from generation to generation, appearing individuals with characteristics different from those of their predecessors. This is how the population evolves, being able to originate new species. Mutations that are detrimental to the carrier individual will be eliminated by natural selection.
PLEASE HELP! EASY POINTS!! WILL MARK BRAINLIEST!!
Q: What is the purpose of Mitosis? Why do cells need to divide?
(costs me 60 points)
Answer:
The goal of mitosis is to divide a cell to produce two cells, each of which is identical to the parent cell. The cell cycle is the process by which cells multiply, which is necessary for an organism to survive.
Explanation:
Hope this helps :)
Doctors often use certain medications to treat infections. A few people have a reaction to some of these medications, such as itching, swelling, or trouble breathing. This is an example of
Answer: The body’s immune system overreacting to a usually harmless substance.
A reaction to some medications, such as itching, swelling, or trouble breathing is an example of hypersensitive reaction (drug allergy).
What is drug allergy?It a an allergic reaction of the body towards a medicine.
What kind of reaction is a drug allergy?It is a kind of hypersensitive reaction.
What is a hypersensitive reaction?It is an exaggerated response of a body towards an immunogen.
Why is it caused?When drugs bind to some immune cells such as T cells, they cause a release of some chemicals which causes an allergic reaction in the body.
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which group of organisms in level 4 of the energy pyramid
Which structure does the immune system target in type 1 diabetes?
a. beta cells of the pancreas
b. liver cells that release glucose
c. insulin receptors on fat cells
d. red blood cells in the bloodstream
Answer:
The thymus plays an important role in deletion of potentially autoreactive T cells. However, the presence of islet-specific T cells in the circulation of type 1 diabetes patients and healthy subjects indicates that the thymus is not capable of efficiently deleting all autoreactive T cells (Mathis and Benoist 2009).
Explanation:
Answer:
A: beta cells of the pancreas
Explanation:
Type 1 diabetes makes the pancreas produce little to no insulin.
Based on the cell cycle, if you were going to look at a group of cells under a microscope, how many cells would be in interphase and how many would be in mitosis?
what are two reasons scientist use shared traits to classify organisms
Answer:
So that we can identify them in the same species.
Explanation:
Many animals have similar species but different genus.
If today is Monday and it is a 1st quarter moon, what phase will it be on Thursday
Answer:
Saturday
Explanation:
because
HELP ASAP !! I WILL GIVE BRAINLIST
Answer:
A. Mountain building
Explanation:
Hope this helps
Which of the following biological processes releases oxygen into the
atmosphere?
A. Transpiration
B. Paristalsis
C. Respiration
D. Photosynthesis
Answer:
D. Photosynthesis.......
How might knowing that earth's position relative to the center of the Milky Way help you make a map of the Milky away?
How do the diaphragm and rib muscles help with breathing? These muscles
pull lungs down to draw in air
change the air pressure
open up the air flow tubes
keep food out of the chest
push blood around the lungs
Look at the pic and thanks :)
Consider this plant cell. Which organelle is labeled A?
Answer:
image so we can answer the question?
Explanation:
An organism has many cells, but cannot move. It does not eat food, but cannot perform photosynthesis cither. What kingdom does it belong to? A,Kingdom fungi, B,Kingdom plantae, C,Kingdom Protista D,kingdom Animalia
Answer:
Explanation:A,Kingdom fungi
Would collecting the resources that go into bread have long-term or short-term effects on the environment? Explain your answer.
Answer:
a short term effect. In their life cycle analysis, the researchers found that a loaf of bread emits about a half-kilo of carbon dioxide. Forty-three percent of bread's greenhouse gas emissions can be attributed to the fertilizers used to grow wheat
It is a short term effect. In their life cycle analysis, it has been observed that a loaf of bread emits about a half-kilo of carbon dioxide.
What's the Environmental Impact of a Loaf of Bread?The life cycle of a loaf o bread is started from growing, harvesting, and transporting to producing flour, shipping to a bakery, baking loaves and packaging them.
In the life cycle it has been found that per loaf of bread about a half-kilo of carbon dioxide is emitted where nearly 43% of bread’s greenhouse gas emissions can be used in the fertilizers for wheat cultivation.
Two-thirds of the emissions come from actual fertilizer production.
we are unaware of the environmental impacts of this products mainly concerned with human health or animal welfare.
It was found that each loaf production is associated with global warming as a result more amount of fertilizer applied in order to increase their wheat harvest.
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Using the Periodic Table of Elements, what group of elements are also known as the Halogen Family?
Answer:
I NEED SOME POINTS TO ASK A QUESTION UGH
Explanation:
Answer:
the answer is this hope it helps
what is the main difference between photosynthesis and cellular respiration
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Cellular respiration converts oxygen and glucose into water and carbon dioxide.
Explanation:
Is this correct guys?
Answer:
Yes its correct.
:)))))
If the length of the small intestine is ( 6 ) meters and the length of the large intestine ( 1.5 ) meters. what is the ratio of the large intestine to the small intestine
Answer:
1:4
Explanation:
According to the information provided in this question, the length of the small intestine is 6 meters and the length of the large intestine 1.5 meters. This means that the small intestine is longer than the large intestine.
To find the ratio of large intestine to the small intestine, we divide each length value by the smallest (1.5) i.e.
Large intestine = 1.5 ÷ 1.5 = 1
Small intestine = 6 ÷ 1.5 = 4
The ratio of large to small intestine according to this question is 1:4
Which phase of cell division is shown?
Exploring mitosis.
anaphase II
telophase I
prophase I of meiosis
telophase II
Answer:
im assuming its the same question i had, i took the quiz and the answer was telophase I
Explanation:
like i said i took the k12 quiz and got 100%
The phase shown here is anaphase. the correct option is A.
What is anaphase?Anaphase is the stage of mitosis that occurs after metaphase, during which replicated chromosomes are split and newly replicated chromosomes are moved to opposite poles of the cell.
The missing image is attached below.
The image is showing the split of chromosomes, so it is indicating anaphase of cell division.
Thus, the correct option is A.
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HELP ONLY IF YOU KNOW PLEASE!!
A species of beetle can be either black or brown in color. The beetle's color is determined by a single gene, and black is recessive to brown. The soil in the area has become darker and closer in color to the black beetles. Which of the following will most likely occur?
Selective pressures will decrease the number of brown beetles.
Selective pressures will increase the number of brown beetles.
Selective pressures will decrease the number of black beetles.
The overall size of the beetle population will continue to decrease over time.
Answer:
the first option
Explanation:
As the soil gets darker, brown beetles become easily recognised by predators (like birds) and will be eaten. Black beetles however, are better camouflaged and will less likely be spotted by the birds. Black beetles will survive and interbreed, allowing the recessive allele to be passed on to upcoming generations.
Selective pressure is what makes the genetic pool shift toward a particular genotype with a particular phenotype (recessive black in this case) that gives the new generations a selective advantage. They're more likely to survive and reproduce. Survival of the fittest.
Genotype- the genetic makeup of an organism (eg: the recessive gene for black; bb)
Phenotype- physical feature of an organism as determined by the genotype (the colour black)
Selective pressures will increase the number of brown beetles. The correct option is 2.
What is Selective pressure?Any factor that reduces or increases reproductive success in a subset of a population may exert evolutionary pressure, selective pressure, or selection pressure, thereby driving natural selection.
Selection pressure can be defined as a force that causes an organism to evolve in a specific direction.
It is not a physical force, but rather an interaction between natural variation in a species and environmental factors that causes certain forms to have an advantage over others.
A beetle species can be either black or brown in color. A single gene determines the color of the beetle, and black is recessive to brown.
The soil in the area has darkened and taken on the color of black beetles. Brown beetle populations will increase as a result of selective pressures.
Thus, the correct option is 2.
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