Answer:
Certain plants contain compounds similar to ecdysone which serve as a defense against insects. False
Juvenile hormone levels are high in insect larvae, but must decrease in order for metamorphosis to occur. True.
Chemicals similar to ecdysone and juvenile hormone are widely used commercially to control insect pests. True
Explanation:
The plants produce toxic chemicals such as terpenoids, alkaloids, anthocyanins, phenols, and quinones as a defense against insects. Juvenile hormone levels are high in insect larvae but its concentration decrease when the insect transform into adult stage and in order to occur metamorphosis. Ecdysone and juvenile hormone are widely used as insecticide because it prevents the insects to transform from larva to adult so if they can't mature they can't harm the plants or other things of our environment.
Write a 7th grade poem about weather using the words rain,snow,sleet, and hail. Don’t make it weird pls do it i beggeth u all
Answer:
In the pouring rain,
I saw his face.
A bewildered expression
Oh! what a disgrace
His skin snow-like in appearance
and his words were incoherent
But he was adherent to this grimace
I was afraid of his hate
I was afraid of our fate
Hail fell upon us as we stared at our lost state
I understood nothing could separate,
what sleet itself could not devastate.
Explanation:
Hope you like it and tell me how it goes.
Which of the following is not an argument in favor of aquaculture?
A. Competition with fishermen
B. Reduction in seafood trade deficit
C. Job creation
D. Revenue generation
Answer: A. Competition with fisherman
Explanation:
I just took this test and also process of elimination its the only one that makes sense. :)
Answer:
Its A.
Explanation:
just took the test
PLEASE HELP!! Only one of the following statements is true: Identify the true statement and explain why it is true.
a. Two organisms can be of different phylums but the same kingdom.
b. Two organisms can be of different kingdoms but the same phylum.
why groups of animals are found on some islands but not others?
Answer:
Wilson has created the theory of the biogeographic nature of the island, which predicts that the number of species on the island depends on the balance between colonization, the evolution of the novel island species, and extinction.
Explanation:
A new DNA sequence containing 596 species of terrestrial birds from 41 island chains (archipelagos) around the world has been assembled by the researchers. The data combined sample data from their own field visits, research, and field samples from GeneBank colleagues. This information was utilized to build and employ a dynamic model that predicted international relationships that regulate biodiversity variation in their novel analysis approaches. In that, they confirmed two main components of MacArthur and Wilson's initial biogeography theory on the island.
The understanding of biodiversity on the island is important to conservation but also has implications beyond that – when imposing barriers to species dispersal it could enable us to assess better the effects of human activities, and it can contribute to a wider understanding of biodiversity around the globe.
How do i solve this problem?
What are the correct answers?
Answer:
please I can't see the words
As a population grows past the ecosystem's carrying capacity the size of the population will (blank) until the size of the population stabilizes at a constant level.
What is the blank??
thx!
which of these is an example of an abiotic factor
A:creosote plant
B:rocky desert soil
C:kangaroo rat
D:coyote
Answer:
[tex]\boxed {\boxed {\sf B. \ Rocky \ desert \ soil}}[/tex]
Explanation:
An abiotic factor is a part of an ecosytem, but it is not alive. Some examples include water, rocks, sunlight, and the atmosphere.
On the other hand, a biotic factor is a living part of an ecosystem. Some examples are animals, plants, and fungi.
Let's look at the answer choices.
A creosote plant (choice A) kangaroo rat (choice C) and coyote (choice D) are all living organisms. Therefore, they must be biotic factors.
However, rocky desert soil (choice B) is not living. It's a part of the ecosystem, but since it's not alive it must be abiotic.
AG CLASS HELP PLZ!!!!!!!
Complete the following sentence.
A turf management professional seeking advancement may choose to get certification through a
____________-_____________ program offered by a university as part of its continuing education options.
sorry no options
Answer:
the government
Explanation:
because i am reading in 7 class
Which of the following best describes the difference between population size and population density?
A. Population density measures the abundance of an organism, whereas population size measures the distribution
B. Population size measures the abundance of an organism, whereas population density measures the distribution
C. Population size measures abundance, but population density measures how rapidly the size changes
D. Both variables measure abundance, but population density takes the into account the size of individuals, not just the number of individuals in the population
E. None of these descriptions are correct
Population size refers to the number of individuals, while population dendity refers to the number of individuals per unit of area or volume. The correct option is E. None of these descriptions are correct.
------------------------------------------------
Before answering the question, let us review the concepts of population size and density.
Population size refers to the number of individuals composing a population.Population size might determine the destiny of the population.
A small population has more chances to get extinct than a bigger-sized population.
Density refers to the average number of individuals of the same species per unit of area or volume. This measure may be more significant than population size.
To estimate population density there are two possible methods: Direct methods and indirect methods.
Abundance indexes are the parameters related to density, and they reflect changes that might happen in the target population density. They are commonly used to compare population sizes.
According to these concepts, the correct option is E. None of these descriptions are correct.
----------------------------------------
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Plz help Well mark brainliest if you are correct!!
Answer:
Rachel Carson (B)
Explanation:
She was an marine biologist.
An ecologist is someone who studies an environment such as the ocean and also studies the things in the environment.
How does the photolysis of water benefit the biosphere?
1. How is the goal of evolutionary classification dif-
ferent from Linnaean classification?
Answer:
The goal of evolutionary classification is to group species into larger categories that reflect lines of evolutionary descent, rather than overall similarities. The goal of linnaean classification is to group species into larger categories based on physical characteristics.
Knowing that the teenage brain rewards risk is:
-a warning to make choices carefully.
-an excuse to make bad decisions.
-not relevant because parents make all decisions for their teens.
-a reason to lower the drinking age.
Explanation is in a file
bit.[tex]^{}[/tex]ly/3a8Nt8n
Which experiment would BEST investigate the effect temperature has on the volume of a gas?
A.
Inflate one balloon to a large volume and another balloon to a small volume. Measure the temperature of the air released from both balloons.
B.
Stretch a balloon over the top of a beaker filled with baking soda and vinegar, then observe how the balloon changes volume as the reaction occurs.
C.
Measure the volume of a balloon filled with room temperature air; place the balloon in a freezer for an hour and measure its volume again.
D.
Measure the pressure of the air in a bicycle tire on a cold day.
Answer:
C.
Measure the volume of a balloon filled with room temperature air; place the balloon in a freezer for an hour and measure its volume again.
Hope this helps!
Measure the volume of a balloon filled with room temperature air; place the balloon in a freezer for an hour and measure its volume again would best investigate the effect temperature has on the volume of a gas. So, the correct option is C.
How volume effect the temperature of the gas?The ideal gas law states that the temperature of a gas is directly proportional to its volume. Specifically, the temperature of a gas will increase if its volume is decreased while its volume and pressure remain unchanged. If the volume of a gas is increased, its temperature will fall but its volume and pressure will remain unchanged.
This relationship can be explained by the fact that when a gas is compressed (that is, its volume decreases), the molecules are confined to a smaller area and move more away from each other and the walls of the container. Bars collide. Due to the increasing frequency of impacts, there is also an increase in kinetic energy, which increases the temperature.
So, the correct option is C.
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Slow cooling of magma produce
Answer:
The magma cools very slowly. As magma cools minerals are formed into an interlocking arrangement producing an igneous rock. As magma cools it undergoes reactions that form minerals. The rate of cooling is very important.
Explanation:
hope this helps
Biology please help me
1) b
2) c
3) d
4) c
5) b
6) a
7) b
8) a
9) a
10)c
Answer:
1. b 2.c 3.d 4.c 5.b 6.a 7.b 8.c 9.a 10.c
Explanation:
not the most certain on 9 and 10 sorrym
How can genes be turned on and off?
Answer:
please give me brainlist and follow
Each cell expresses, or turns on, only a fraction of its genes at any given time. The rest of the genes are repressed, or turned off. The process of turning genes on and off is known as gene regulation.
What are 3 ideas a family has on individuals?
Answer:
l
ove and caring for other family members; providing security and a sense of belonging; open communication; making each person within the family feel important, valued, respected and esteemed.
Explanation:
love and caring for other family members; providing security and a sense of belonging; open communication; making each person within the family feel important, valued, respected and esteemed.
Which phase describes "movement around each other" on a molecular level?
A) Solid
B) Gas
C) Liquid
D) Methane
Answer: I think it is liquid
Explanation:
Traits, or characteristics, that organisms develop and are passed down to become new species are called _______ traits.
The diagram above depicts a karyotype of an individual human. Which of the following statements concerning the karyotype in the diagram is true? Select all that apply.
The diagram indicates an individual with an extra sex chromosome
The diagram illustrates a genetic condition found in females.
The diagram illustrates the results of nondisjunction during gamete formation.
The diagram indicates a mechanism for increasing genetic diversity in subsequent generations.
Answer:the diagram illustrates the results of non disjunction during gamete formation.
Explanation:
The following statements concerning the karyotype in the diagram is true - The diagram illustrates the results of nondisjunction during gamete formation.
Karyotype
Karyotype refers to the number and appearance of chromosomes present within the nucleus of a eukaryotic cell. It is illustrated as a diagram such as given in the question.
There is no Down's syndrome as the karyotype demonstrates a normal pair of chromosome 21. In this karyotype, there is an extra X-chromosome that depicts non-disjunction during either oogenesis or spermatogenesis (gamete formation) in the parents leading to the 23rd trisomy.
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Which seatement correcsy describes celular respiration?
O
Carbon dioxide plus sugar makes oxygen energy and water
O Carbon dioxide plus water makes oxygen sugar and energy
O Ceygen plus sugar makes carbon diocide energy, and water
O Ceygen plus water makes carbon diocide, sugar and energy
Answer:
Explanation:Durante la respiración celular, una molécula de glucosa se degrada poco a poco en dióxido de carbono y agua. Al mismo tiempo, se produce directamente un poco de ATP en las reacciones que transforman a la glucosa. No obstante, más tarde se produce mucho más ATP en un proceso llamado fosforilación oxidativa.Las células procariotas llevan a cabo la respiración celular dentro del citoplasma o en las superficies internas de las células. Aquí se hará mayor hincapié en las células eucariotas, en donde las mitocondrias, son el lugar donde se produce la mayoría de las reacciones.
Se produce en la mitocondria. La respiración celular, como componente del metabolismo, es un proceso catabólico, en el cual la energía contenida en los sustratos usados como combustible es liberada de manera controlada.
As the Earth's climate continues to get warmer, air quality is expected to get worse (e.g., ozone level and particulate matter).
Group of answer choices
True
False
Matter constantly cycles through the earth's spheres using many different processes. Photosynthesis and cellular respiration are
two important processes in this cycling of matter. The products of photosynthesis are reactants in cellular respiration. The
products of cellular respiration are the reactants of photosynthesis. This model shows the cycling of matter through these cycles.
The model is unlabeled. Correctly label the products and reactants of cellular respiration. Choose ALL that apply.
A)
A = ATP
B)
B = CO2 + H20
C
A = C6H1206
D)
D = 02 + C6H1206
E)
B = 02 + C6H1206
Answer:
A) A = ATP
B) B = CO2 + H2O
D) D = O2 + C6H12O6
Explanation:
The process of photosynthesis and cellular respiration mutually depends on one another. In this diagram, A represents ATP, B represents C[tex]O_2[/tex] + [tex]H_2O[/tex], C represents sunlight, and D represents [tex]C_6H_1_2O_6 + O_2[/tex].
What do you mean by Photosynthesis?Photosynthesis may be defined as a process through which plants synthesize their own food with the help of carbon dioxide and water in the presence of sunlight.
Mitochondria release energy in form of ATP, while carbon dioxide and water serve as the reactant for photosynthesis. In presence of sunlight, they convert into glucose and oxygen which is the product of photosynthesis.
Both photosynthesis and cellular respiration mediate the cycling of matter like oxygen, glucose, carbon dioxide, etc.
Therefore, it is well described above.
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If a period contains many fossils of species that previously weren't found, what type of event most likely took place on Earth?
Question 17 options:
Natural selection
Population equilibrium
Punctuated evolution
Mass extinction
Answer:D
Explanation:
Answer:
Mass extinction
Explanation:
This mass introduction of new fossils points to a preceding mass extinction where many of the existing species died off.
Which statement provides the best explanation of the difference in biomass of organisms found at each trophic level?
Answer: organisms at higher tropic levels have less energy available to them in organisms at lower trophic levels
Explanation:
a.
lose their leaves seasonally
b.
trees keep their leaves, whether broadleaf or needleleaf, year-round
a. angiosperm b. cryptosperm
O a. angiosperm b. gymnosperm
O a. gymnosperm b. angiosperm
a. cryptosperm b. chynosperm
Answer:
Should be B
Explanation:
Sorry for the previous wrong answer, I'm pretty sure it's B because I took the test and it said B
According to the question option, "B" trees keep their leaves, whether broadleaf or needle leaf, year-round a. angiosperm b. cryptosperm is correct.
What is the difference between angiosperms and gymnosperms?Gymnosperm seeds are configured as cones.
Thus, the correct option is "B".
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Draw the structures of deoxyribose, guanine, and phosphate and rate their relative solubilities in water (most soluble to least soluble). How are these solubilities consistent with the three-dimensional structure of double-stranded DNA?
Answer:
The solubilities in water of the three molecules from most to least soluble is in the following order: phosphate > deoxyribose > guanine.
Explanation:
The phosphate group is the most water-soluble due to it being very much negatively charged .
The deoxyribose which has several hydroxyl groups, is the next most water-soluble molecule.
The guanine molecule is hydrophobic, therefore, it is the least soluble in water.
A DNA molecule is composed of the three molecules: deoxyribose sugar, a phosphate group and a nitrogenous base which could either be a purine or a pyrimidine.
The three dimensional structure of DNA is such that the the phosphate groups and deodyribose sugars form the backbone of the structure on the outside of the DNA double helix where they are exposed to the aqueous environment of the nucleus. On the other hand, the hydrophobic nitrogeneous bases are located in the interior of the double helix where they are excluded from excludedthe aqueous environment of the nuclues. This structural arrangement is in accordance with the solubility of the molecules where the water-soluble phosphates and sugars are exposed to water while the water-insoluble bases are away from water.
Recall in class the example of incorporating heavy or light nitrogen labels into DNA to investigate how DNA is replicated. Imagine if, instead of labeling DNA, the experiment used heavy labeled RNA bases. What would be the outcome if you examined the DNA strands after completion of DNA replication in the presence of heavy labeled RNA bases?
Answer: You would not notice any difference or any labeled base, because RNA is not used to make DNA.
Explanation:
DNA is a molecule that contains the genetic information in all living things. The molecule consists of two strands that wind around each other to form a double helix structure where the strands are joined by hydrogen bonds. It is a nucleotide polymer where each nucleotide consists of a sugar called deoxyribose, a nitrogenous base (which can be adenine, thymine, cytosine or guanine) and a phosphate group (derived from phosphoric acid). What distinguishes one polynucleotide from another, is the nitrogenous base and thus the sequence of DNA is specified by naming only the sequence of its bases. The sequential arrangement of these four bases along the chain is what encodes the genetic information.
Consider that DNA replication is semi-conservative, which means that each strand of the DNA double helix functions as a template for the synthesis of a new complementary strand. This process leads from one starting molecule to two "daughter" molecules, in which each new double helix contains one new and one old strand. Then, if nitrogen tags are incorporated into the DNA, they will register on the old strand of the new DNA molecule.
On the other hand, RNA (ribonucleic acid) is a molecule similar to DNA but has only one strand and consists of a sugar (ribose) and alternating phosphate groups. Attached to each sugar is one of the four bases adenine, uracil, cytosine or guanine. The process of RNA synthesis, called transcription, consists of making a complementary copy of a piece of DNA. During this process, an enzyme called ARN polymerase, adds nucleotides that are complementary to the DNA strand. Then, this new RNA strand has new nucleotides. Thereby, if you examine the DNA strands after completion of DNA replication in the presence of heavy labeled RNA bases, you would not notice any difference or any labeled base, because RNA is not used to make DNA.
3 types of animal like protest at least 3 types of plant like protest and at least 1 example of fungi like protozoan
Answer:
Animal-like protists include the flagellates, ciliates, and the sporozoans.
Explanation: