Answers
Answer:
They discovered the structure of the DNA: a double helix
Explanation:
Related Questions
help needed How skin is involved in homeostasis? Explain with the help of examples.
Answers
Answer:
am not sure but i will find out later. Is that ok with u?
Explanation:
Classify the organisms based on how they obtain food
Answers
Answer:
Tipos de Nutrición
- Autótrofa: Sintetiza sustancias orgánicas a partir de sustancias inorgánicas simples, como las plantas.
- Heterótrofa: Los que necesitan alimentos procedentes de otros seres vivos, como los animales. ...
- Herbívoros. Son los que se alimentan de plantas. ...
- Carnívoros. ...
- Omnívoros. ...
- Filtradores. ...
- Decomponedores
Explanation:
Answer:
Autotroph: Sunny fields, Carrots, ...the sea algea(or whatever that is)
Heterotroph: Tiger, Human, Deer
Explanation:
I got it right
hope this helps :)
Which two planets have 53 moons? 1)Earth and Mercury 2)Jupiter and Saturn 3)Mercury and Mars 4) Neptune and Jupiter
Answers
Answer:
Jupiter and Saturn
Explanation:
Answer:
Saturn and Jupiter
Explanation:
Saturn has 82 moons, but 53 officially named
Jupiter has 79 moons, but 53 officially names.
Other than this, no other have exactly 53 in any way.
Hope this helps
11. List two physical properties of soil.
list three conditions necessary for the germination of seed.
E.P BETHEL INTERNATIONAL SCHOOL- ACCRA NEWTOWN
END OF SECOND TERM EXAMINATION- 2020
INTEGRATED SCIENCE-JHS ONE
SECTION B (ESSAY) 6OMARKS
Answer any four questions in this section. Each complete question carries 15 marks.
2. a. i. State the reasons why some seeds are nursed.
(3mar
(2mar
(1x3.
(2mc
(2m
b. I. List three (3) conditions necessary for the germination of seed.
ii. State two functions of roots.
'c. (1) What is dispersal of seeds?
(11) State two characteristics of seeds dispersed by wind.
3. a. Apiece of stone has a mass of 360g. When it is put into water in a glass,
the level of water rises from 60.0cm to 90.0cm.Calculate the density of
(3r
(5
the stone.
b. i. List three benefits of vegetables to humans.
ii. Give two reasons why soil air is important.
c. 1. Define the term soil profile.
ii. State two ways in which soil profile is important in crop production
Answers
Answer:
Number 11 is the soil color and the soil texture.
Number 2.a.i. is to protect the seeds from harsh weather conditions e.g. sunlight rainfall etc.
b. water, oxygen and warmth
c.1) Seed dispersal is the scattering of seeds from a mother plant to new areas.
11) Seeds dispersed by wind have wing like structures.
Seeds dispersed by wind are light.
3a. Density=Mass/Volume
=360g/60cm³ then cancel zero and zero then cancel by 6 once by 36÷6 we get 6g/cm³
3bi)Vegetables are a source of food to humans.
Vegetables provide herbal medicine to humans.
ii)Plants require oxygen for germination.
Organisms in soil require air to breathe.
3c)Soil profile is the verticle arrangement of layers from top to bottom.
3d)It helps a farmer to know the fertility of the soil.
Explanation:
what are the two main a biotic factor that affect organisms in a marine ecosystem
Answers
Answer:
one of these a or b i know that much
Explanation:
my bad
Answer:the answer will be ----------- B oxygen level and water temperature
Explanation:
njsdnjcnjncds just know ;)
What are 10 thing that classify as a second succession?
Answers
1. An area of growth.
2. A disturbance, such as a fire, starts.
3. The fire destroys the vegetation.
4. The fire leaves behind empty, but not destroyed soil.
5. Grasses and other herbaceous plants grow back first.
6. Small bushes and trees begin to colonize the public area.
7. Fast-growing evergreen trees and bamboo trees develop to their fullest, while shade-tolerant trees develop in the understory.
8. The short-lived and shade-intolerant evergreen trees die as the larger deciduous trees overtop them. The ecosystem is now back to a similar state to where it began.
a person who is more than 2o percent heavier than the average person of the same sex and height is said to be
Answers
Answer:
overwieght
Explanation:
In which life stage can butterflies reproduce?
Answers
Answer:
Explanation:
All butterflies have "complete metamorphosis." To grow into an adult they go through 4 stages: egg, larva, pupa and adult. Each stage has a different goal - for instance, caterpillars need to eat a lot, and adults need to reproduce.
Major difference between messaging via the nerves and hormones
Answers
Answer:
the nerves produce immediate but short-living responses while hormo nes produce slow but short-living responses
Explanation:
i hope this will help you
What does Electronegativity mean in regards to
elements? How does electronegativity influence the
molecule's chemical property?
Help :(
Answers
Answer:
it is the ability of attracting other molecules this effect the properties by what it is going to bond to. like say it is 6 and another 2 they will be more likely too bond to one another to make a valence of 8.
Explanation:
Identify the terms described by selecting the correct word from the drop-down menu.
Anything that has mass and takes up space
The part of Earth in which life exists, including land, water, and air
Answers
Answer: a g I need the same answer too
Explanation:
what is the importance of regulating gene expression
Answers
Answer:
Regulated gene expression is crucial to the proper growth & survival of an organism and cannot be over-emphasized. Without it, the genetic code of a chromosome is the equivalent of a computer data file without the appropriate application to run it.
What industry was created when people suddenly had more time and money available?
Answers
If there is a high death rate and large amount of _______,
populations will likely decrease
Answers
Answer:
emigration
Explanation:
Which term identifies the cell’s ability to maintain its internal conditions? transport diffusion osmosis homeostasis
Answers
Answer: Homeostasis
Explanation: The process of homeostasis is when self-regulation occurs in order to keep balance while adapting to changes.
Answer:
homeostasis
Explanation:
I got the question right
Through advancements, we are now able to classify
organisms into three domains by analyzing the______. Fill in the blank.
Answers
Answer:
rRna
Explanation:
Answer:
by analyzing the Ribosomal RNA
Explanation:
took the test :)
what is a function of a protein macromolecule
Answers
Answer:
A function of a protein macromolecule is: Moving things in and out of cells. Transporting other molecules in the body. Protein macromolecule makes up the connective tissue in tendons. Moves things in and out of cells.
Explanation:
Answer:
move things in and out of the cell
Explanation:
move things in and out of the cell
What is the number of this particle in a phosphorus atom?
Ap ex
Answers
Answer:
Fósforo
Símbolo P, número atómico 15, peso atómico 30.9738. El fósforo forma la base de gran número de compuestos, de los cuales los más importantes son los fosfatos. En todas las formas de vida, los fosfatos desempeñan un papel esencial en los procesos de transferencia de energía, como el metabolismo, la fotosíntesis, la función nerviosa y la acción muscular. Los ácidos nucleicos, que entre otras cosas forman el material hereditario (los cromosomas), son fosfatos, así como cierto número de coenzimas. Los esqueletos de los animales están formados por fosfato de calcio.
Cerca de tres cuartas partes del fósforo total (en todas sus formas químicas) se emplean en Estados Unidos como fertilizantes. Otras aplicaciones importantes son como relleno de detergentes, nutrientes suplementarios en alimentos para animales, ablandadores de agua, aditivos para alimentos y fármacos, agentes de revestimiento en el tratamiento de superficies metálicas, aditivos en metalurgia, plastificantes, insecticidas y aditivos de productos petroleros.
De casi 200 fosfatos minerales diferentes, sólo uno, la fluoropatita, Ca5F(PO4)3, se extrae esencialmente de grandes depósitos secundarios originados en los huesos de animales y que se hallan en el fondo de mares prehistóricos, y de los guanos depositados sobre rocas antiguas.
La investigación de la química del fósforo indica que pueden existir tantos compuestos basados en el fósforo como los de carbono. En química orgánica se acostumbra agrupar varios compuestos químicos dentro de familias llamadas series homólogas.
Esto también puede hacerse en la química de los compuestos de fósforo, aunque muchas familias están incompletas. La familia mejor conocida de estos compuestos es el grupo de cadenas de fosfatos. Las sales de fosfatos constan de cationes, como el sodio, junto con cadenas de aniones, como (PnO3n+1)(n+2)-, que pueden tener de 1 a 1 000 000 de átomos de fósforo por anión.
Los fosfatos se basan en átomos de fósforo rodeados en una disposición tetraédrica por átomos de oxígeno, el miembro más pequeño de la familia es el anión simple PO3-4 (el ion ortofosfato). La familia de las cadenas de fosfato se basa en hileras alternadas de átomos de fósforo y oxígeno en que cada átomo de fósforo permanece en el centro de un tetraedro de cuatro átomos de oxígeno. Hay también una familia estrechamente relacionada de fosfatos cíclicos.
Una característica estructural interesante de muchos de los compuestos del fósforo conocidos es la formación de estructuras tipo jaula. Ejemplos de estas moléculas son el fósforo blanco, P4, y uno de los pentóxidos de fósforo, P4O10. Las estructuras tipo red son comunes; por ejemplo, los cristales de fósforo negro en que los átomos están enlazados unos con otros.
En la mayor parte de sus compuestos, el fósforo está enlazado químicamente a cuatro átomos inmediatos. Hay gran número de compuestos en los que uno de los cuatro átomos está ausente y en su lugar hay un par de electrones no compartidos.
Hay también unos cuantos compuestos con cinco o seis átomos unidos al fósforo; son muy reactivos y tienden a ser inestables. Durante los años 60 y 70, se prepararon muchos compuestos orgánicos de fósforo. La mayor parte de estas estructuras químicas incluye tres o cuatro átomos enlazados al fósforo, pero existen también estructuras con dos, cinco o seis átomos unidos a cada átomo de fósforo.
Casi todo el fósforo utilizado en el comercio está en forma de fosfatos. La mayor parte de los fertilizantes fosfatados constan de ortofosfato diácido de calcio u otofosfato ácido de calcio muy impuros, Ca(H2PO4)2 y CaHPO4. Estos fosfatos son sales del ácido ortofosfórico.
El compuesto de fósforo de mayor importancia biológica es el adenosintrifosfato (ATP), que es un éster de la sal, el tripolifosfato de sodio, muy utilizado en detergentes y ablandadores de agua. Casi todas las reacciones en el metabolismo y la fotosíntesis requieren la hidrólisis de este tripolifosfato hasta su derivado pirofosfato, llamado adenosindifosfato (ADP).
Efectos del Fósforo sobre la salud
El Fósforo puede ser encontrado en el ambiente más comúnmente como fosfato. Los fosfatos son substancias importantes en el cuerpo de los humanos porque ellas son parte del material de ADN y tienen parte en la distribósforo que es conocida. Cuando el fósforo blanco ocurre en la naturaleza este puede ser un peligro serio para nuestra salud. El fósforo blanco es extremadamente venenoso y en muchos casos la exposición a él será fatal. En la mayoría de los casos la gente que muere por fósforo blanco ha sido por tragar accidentalmente veneno de rata. Antes de que la gente muera por exposición al fósforo blanco ellos a menudo experimentan náuseas, convulciones en el estómago y desfallecimiento. El fósforo blanco puede causar quemaduras en la piel, dañar el hígado, corazón y riñones.
Efectos ambientales del Fósforo
Answer:
Name: Phosphorus
Symbol: P
Atomic Number: 15
Atomic Mass: 30.974 atomic mass units
Number of Protons: 15
Number of Neutrons: 16
Number of Electrons: 15
Melting Point: 44.1° C
Boiling Point: 280.0° C
Density: 1.82 grams per cubic centimeter
Normal Phase: Solid
Family: Nonmetals
Period: 3
Cost: $4 per 100 grams
Origin of Name From Greek words phos, meaning light and phoros meaning bearer
Date and Place of Discovery In 1669 in Germany
Discovered by Hennig Brand
Explanation:
why is not recommended to use antibiotics often
Answers
Answer: It may cause the bacteria to become resistant to them and one they are resistant then the antibiotics are ineffective against the bacteria. It is then more dangerous since new antibiotics will need time.
Explanation:
Explanation:
If you take antibiotics for the wrong reason(s) or if you take them too often it can change bacteria so much, that antibiotics have a reduced effectiveness against them, or stop working against them all together.
The so called "bacterial resistance" or "antibiotic resistance" is a real thread to humans. Some bacteria have turned out to be resistant to even the most powerful antibiotics available. Antibiotic resistance is a growing problem.
Suppose you get infected with such resident bacteria, it means there is no longer an effective treatment by using antibiotics.
*EXTRA*
If left "un treated", the bacteria can grow, more or less, with unlimited exponential growth. In such scenarios, any "simple" bacterial infection, could turn out to be fatal.
Often the biggest problem is the lack of time to find out exactly what type of bacteria is making the patient ill. Because there are so many different bacteria, it is impossible to tell what is the right one without deduction and, that takes time (to grow visible cultures in the laboratory). Sometimes a patient might be already critically ill, in such cases, the doctor would want to start the treatment immediately, which could mean they HAVE TO start admitting a broad-spectrum antibiotic, to hopefully battle that group of different bacteria, which hopefully included the one that is making the patient ill. But if that specific bacteria turns out to be resestant, then that poses a very serious problem. Possible a fatal one, since the time is up, and the bacteria keep growing in numbers, roughly doubling in numbers every hour...
Order the events that occur during DNA replication. DNA ligase seals the gaps between new DNA and Okazaki fragments. RNA primase synthesizes a primer which attaches to the initiation point. DNA helicase unwinds the DNA. DNA polymerase removes RNA primers and replaces them with DNA nucleotides. DNA polymerase extends the primer by adding nucleotides that are complementary to the template strand. ↓ ↓ ↓ ↓
Answers
Answer:
DNA helicase unwinds the DNA.
RNA primase synthesizes a primer which attaches to the initiation point.
DNA polymerase extends the primer by adding nucleotides that are complementary to the template strand.
DNA polymerase removes RNA primers and replaces them with DNA nucleotides.
DNA ligase seals the gaps between new DNA and Okazaki fragments. Explanation:
What are the three types of muscle fibers? A) smooth, intermediate- twitch, cardiac B) slow- twitch, intermediate- twitch, fast-twitch C) slow-twitch, fast-twitch, involuntary
Answers
Answer:
B) slow- twitch, intermediate- twitch, fast-twitch
Explanation:
The three types of muscle fibers are:
Slow-twitch: they are also called Red Fibers because of their color or type I. These type of fibers are resistant to fatigue, that means that they can contract for long periods, but its contraction is not very strong. Muscles that maintain our posture, such as our back muscles, have a predominancy of these types of fibers.Fast-twitch fibers: they are also called type II, or White Fibers because of their color due to the low supply of blood. They are fibers that contract very fast and are not resistant to fatigue. These types of fibers can generate higher amounts of force in a short period, but their contraction is for a short period. They are present in our eye's muscles.Intermediate twitch fibers: they characteristics are between the two types of fibers mentioned above. That is to say, that they do not contract as fast as fast-twitch fibers do but not as slow as slow fibers either, also, they fatigue quickly but nos as quicky as fast-twitch fibers or as slow as slow-twitch. They are in the majority of our muscles.Which statement gives one reason that watershed protection programs are needed in Virginia
Ecosystems need to be controlled
Foods must be prevented
Dams can be damaged and may require repair
Wildlife can ruin water source when building habitats
Answers
Answer:
Dams can be damaged and may require repair
Explanation:
This is imperative to provide needed supports and maintenance for the aging dams,with capacity of up to 11,000. This dams were created as far back as 1948.Therefore the programme was geared towards effective re-habitation for maximum efficiency.
This repair programmes was termed Dam Rehabilitation Programme.And the secretary of Agriculture was given the authority to ensure effective execution of the programme.
In the state of Virginia,a total of 150 dams were part of the government landscape through the rehabilitation programme, and 11 of these have been well studied. .Todd Lake,Robinson Hallow, Lake Barton are some of these examples.
Answer:
the answer is c
Explanation:
One of the most important factors in the rapid spread and dispersal of zoonotic diseases in the modern world is : a. increased demand for meat b. improved transportation including high-speed rail and air lines c. wind dispersal d. none of the above
Answers
Answer:
a. increased demand for meat
Explanation:
Zoonotic diseases refers to those diseases that are transferred to human host from an animal carrier. Zoonotic diseases can be transmitted when a living host is bitten by an animal or insect, eats a contaminated food and more. Examples of zoonotic diseases are; rabies, bird flu, anthrax, ebola etc.
Among the causes of zoonotic diseases, one of the most significant factors in the rapid spread and dispersal of zoonotic diseases in this modern world is the increase in demand for meat. Considering that eating contaminated and infected food from an animal can transfer the disease, an increase in demand for meat is one factor to look into regarding why zoonotic diseases are proliferating.
Question 24 of 30
1 Point
In 1953, Stanley Miller and Harold Urey built a model of Earth's early
atmosphere by mixing gases that were thought to have been there. They
exposed the gases to an electric current to simulate lightning. The liquid that
condensed during the experiment contained amino acids.
What was the significance of their results?
O A. Miller and Urey proved the theory of spontaneous generation.
B. Miller and Urey proved that all life evolved from a single common
ancestor.
C. Miller and Urey proved that lightning was necessary for life to form
on Earth
O
D. Miller and Urey proved that biological molecules could have
formed in a similar way.
Answers
The essence of the experiment was that it showed that biological molecules could have formed in a similar way.
What was the experiment of Miller and Urey?The experiments of Miller and Urey were the first step in trying to prove the idea tat life originated from simple biological molecules.
Though the life forms did not form from the gases that were used, but the biological molecules did form. Thus, the essence of the experiment was that it showed that biological molecules could have formed in a similar way.
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A limestone bed containing fossils that are 550 million years old is ____ a bed of sandstone containing fossils that are 400 million years old. a. younger than c. older than b. the same age as d. not related to Please select the best answer from the choices provided A B C D
Answers
A limestone bed constituting fossils 550 million years old is older than a sandstone bed containing fossils 400 million years old. The correct option is c.
What is sandstone?Sandstone is a sedimentary rock that is sometimes mostly composed of quartz sand, but it could also contain substantial amounts of feldspar, silt, and clay.
A limestone bed comprising fossils dating back 550 million years is older than a sandstone bed containing fossils dating back 400 million years.
Thus, the correct option is c i.e., older than.
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1 2 3 4 5 6 7 8 9 10
TIME REMAINING
52:11
Environmental factors can influence natural selection because they can increase or decrease
the number of chromosomes in an individual.
the number of chromosomes in a population.
the amount of genetic variation in an individual.
the amount of genetic variation in a population.
Answers
Answer:
49 sec
because you have never seemed yet 59 hour instead 12 hour.
but 24 hour also.
Carly has wavy hair. Her father has straight hair, and her mother has curly hair. Which type of inheritance pattern is responsible for Carly’s wavy hair?
A.
codominance
B.
dominant
C.
incomplete dominance
D.
polygenic
E.
recessive
Answers
Answer:
Incomplete Dominance
Explanation:
A plant has two alleles for color. The red allele is recessive, and is represented by q. The purple allele is dominant, and is represented by p. If 59 of 100 organisms are red, what is q? P^2 2pq q^2=1
Answers
Answer:
q is 0.7681
Explanation:
The red allele is recessive, and is represented by q.
If 59 of 100 organisms are red meaning the frequency of the recessive genotype of red is 59/100 = 0.59 represented by q².
Thus q would be to find the square root of q². Where q is the frequency of the recessive allele in the population
Thus, q = √q² where q² = 0.59
q = √0.59
q = 0.7681
10 PTS FOR THIS QUESTION!!!!! Will mark brainliest if you give a good answer and i will friend you!!! pretty pls with a cherry on top!!!Compare and contrast the events of light reaction and dark reaction in the photosynthesis process.
Answers
-occurs in thylakoid membrane of the chloroplast
-depends on sunlight (obviously)
-ATP (adenosine triphisphate) and NADPH (nicotinamide adenine dinucleotide phosphate) are produced
-oxygen is released
-photosynthesis occurs
-chlorophyll = pigments involved
dark:
-occurs in the stroma of the chloroplast
-doesn’t depend on sunlight
-no pigments involved
-photosynthesis doesn’t occur
-glucose is produced
-carbon dioxide is absorbed
Which class of biomolecule do the molecules in the table belong to? A. proteins B. carbohydrates C. nucleic acids D. lipids
Answers
Answer:I can't see any table but I will tell you everything about protein molecules and the rest.
protein belongs to the table of amino acids .
carbohydrates belong to the table of sugar.
nucleic acids belong to the table of nucleotides.
lipids belong to the table of fatty acids and glycerol.
Explanation:
Protein belongs to the table of amino acids, carbohydrates belong to the table of sugar, nucleic acids belong to the table of nucleotides and lipids belong to the table of fatty acids and glycerol.
Which class of biomolecule do the molecules in the table belong to?Amino acids combine together to form protein, glucose combine together to form carbohydrates, Nucleotides combine together to form nucleic acids, fatty acids and glycerol combine together to form lipids.
So we can conclude that Protein belongs to the table of amino acids, carbohydrates belong to the table of sugar, nucleic acids belong to the table of nucleotides and lipids belong to the table of fatty acids and glycerol.
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