I need someone who is kind enough to help with a year 7 science test for free thank you may god bless you.

Answers

Answer 1

Answer:

I can help the best I can with your science question. what is your question? I will assist you and explain to you in the best way possible!

Explanation:

Please either ask your science question in the comment or make a question on Brainly.


Related Questions

The total magnification produced from a 15x ocular and a 4x objective would be

Answers

60. To get total magnification you simply multiply ocular by the objective.

Compared to the offspring of sexual reproduction in animals, the
þffspring of asexual reproduction will
A) show greater variety
B) be more resistant to disease
C) be genetically identical to the parent
D) grow larger

Answers

Answer:

C: Genetically identical.

Explanation:

Offspring are usually going to look like it's parents. Asexuals produce offspring that's supposed to look like them. I hope this helps :) and if it's wrong please know that I am very sorry for the mistake :(

The diagram below shows an energy pyramid for various trophic levels in an ecosystem. According to this pyramid, which trophic level has the LEAST amount of energy?
1. A
2.B
3.C
4.D​

Answers

Answer:

A

Explanation:

Please answer both ASAP Will Mark brainliest

Answers

Answer:

Mitosis Has Single Nuclear Division results in 2 Nuclei

2 Daughter Cells Are Produced 2 diploid cells.

Meiosis Has 2 Rounds of Nuclear Division resulting in 4 Nuclei

4 Daughter Cells Are Produced. 4 haploid cells

Both Have Cells divide and Reproduce

Explanation:

A population age structure in which the birthrate is high A population age structure in which the birth rate is high and the population is mainly young would be best
represented by a graph with a/an -shaped curve.
O bell
O urn
O pyramid
O S
O J

Answers

Answer:

pyrimid

Explanation:

please help very easy 5th grade work giving brainliest

Answers

Answer:

The answer is A because it erodes rocks away over time

Explanation:

A

The same nutrient is one of the
slowest moving nutrients and is
often the limiting nutrient in
aquatic ecosystems. What is this
nutrient?
A. carbon
B. nitrogen
C. phosphorus

Answers

The answer is c

Phosphorus is often the limiting nutrient, or nutrient that is most scarce and thus limits growth, in aquatic ecosystems.

Hope it helps

Help!!! This question is nowhere in the internet!

Answers

Answer:

chargaff's rule: a=t g=c

(a+t)+(c+g)= 100

(23+23)+(x) = 100

46+x = 100

x = 54

x/2 = 27

the answer is 27%

A researcher dried a feedstuff and determined that it contained 10 percent moisture. he took 1 gram (dry) of it and combusted it in the bomb calorimeter. the calorimeter contains 1 kg of water. The temperature was raised 2.7 degrees centigrade. Two kilograms (2000 grams) of dry matter of the material was fed to a pig each day for several days. the fecal collections of the pig averaged 200 grams dried per day for the last few days. the feedstuff analyzed 2.41 percent nitrogen (dry basis); the feces (dry basis) analyzed 4.6 percent nitrogen. (hint: the feedstuff contained _____ grams protein, the feces contained _____ grams protein.)

Answers

Answer:

Explanation:

The objective of the information given is to calculate the apparent digestible dry matter present in the feedstuff(%) and the apparent digestibility of the protein?

From the given information:

The apparent digestible dry matter present is:

[tex]=\dfrac{ (\text{Dry matter fed to the pig} - \text{Fecal matter of the pig} )}{\text{Dry matter fed to the pig}} \times 100 \%[/tex]

where;

Dry matter fed to the pig = 2kg = 2000 g

Fecal matter of the pig = 200

The apparent digestible dry matter present = [tex]\dfrac{2000-200}{2000}\times 100\%[/tex]

[tex]=\dfrac{1800}{2000}\times 100\%[/tex]

= 90

Amount of Nitrogen(i.e. the protein) content present in the feedstuff = 2.41%

i.e.

2.41 g/100 g   OR   48.2 g/2000 g feed

Amount of protein present in feces = 4.6% (4.6 g/100 g  OR  9.2g/200g of feed)

apparent digestibility of the protein is:[tex]=\dfrac{\text{Amount in feed }- \text{Amount in feces}}{\text{Amount in feed }}\times 100[/tex]

[tex]= \dfrac{(48.2 - 9.2)}{48.2}\times 100[/tex]

[tex]= \dfrac{39}{48.2}\times 100[/tex]

= 81%

I kneed you know what the answer is

Answers

Pretty sure its Phagocytosis

Which of these provides the best evidence for the plate tectonic theory?

The rise of magma by the convergence of earths plates

The destruction of earths magnetic field by the rotation of earths core

The variations in the age of rocks at different distances from the mid ocean ridges

The difference in the shapes of the Atlantic ridge and the coastlines of continents

Answers

Answer: C

Hope this helps!

La polidactilia en la especie humana se debe a un alelo dominante. Entre Francisco y Martha, ambos abuelos de Santiago, uno de ellos tenía polidactilia, sin embargo Juan su hijo (papá de Santiago) nació normal. A pesar de ello Santiago es polidactílico. La explicación a esta situación es que

Respuestas:
A)Como Juan nació normal (aa) la única posibilidad para que Santiago su hijo naciera con polidactilia era que su madre lo fuera también.

B) Como uno de los abuelos era aa (homocigoto recesivo-normal) y el otro Aa (heterocigoto-polidactílico), Juan nació probablemente aa (homocigoto recesivo-normal) y por ello no hay manera que Santiago naciera polidactílico.

C) Como uno de los abuelos era aa (homocigoto recesivo-normal), Juan nació probablemente aa (homocigoto recesivo- normal) y por ello Santiago es polidactílico.

D) Como Francisco y Martha eran Aa (ambos heterocigotos-polidactílicos), Juan nació probablemente AA (homocigoto dominante- polidactílico) y por ello Santiago es polidactílico.

Answers

Answer:

A)Como Juan nació normal (aa) la única posibilidad para que Santiago su hijo naciera con polidactilia era que su madre lo fuera también.

Explanation:

La polidactilia es una malformación causada por un alelo dominante asociada con al aparición de más de 5 dedos en cada pie o más de 5 dedos cada mano. Un alelo dominante es una variante génica capaz de enmascarar la expresión de un alelo recesivo en individuos heterocigotos, es decir, en individuos portadores de una copia del alelo dominante y una copia del alelo recesivo para un gen en particular. De este modo, un alelo dominante es por definición aquel que será expresado en el fenotipo, con lo cual el único modo en el cual Santiago sea portador del alelo dominante causante del rasgo "polidactilia" es que él lo haya heredado, ya sea del padre o de la madre (es importante aclarar que también el alelo dominante puede haber surgido por mutación en la línea germinal). En este caso sabemos de acuerdo al enunciado que el padre de Santiago no tiene polidactilia y por lo tanto no es portador del alelo dominante, con lo cual se espera que Santiago haya heredado esta condición de su madre.

Which statement describes Mendel’s hypotheses regarding gametes?
A) gamete carries two genes for a trait.
B) gamete carries one allele for a gene.
C) gamete can carry multiple alleles for a trait.
D) Some gametes are dominant and some are recessive.

Answers

Answer:

The correct answer is B. A gamete carries one allele for a gene.

Explanation:

Gamete (also called sex cell or reproductive cell) is a haploid cell (having half number of chromosome as compared to the parent cell) that is produced through a cell division, termed as meiosis in sexually reproducing organisms.

According to the Law of segregation given by Gregor Mendel-

During the process of gamete formation, the two alleles of each gene segregate from one another so that a gamete carries one allele for a gene.

Thus, option B) is the right answer.

Answer:

B.

Explanation:


X-ray crystallography is a very important process that is used to help identify the structure of molecules. What exactly does this process show?

Answers

Answer:

can reveal the precise three-dimensional positions of most atoms in a protein molecule because x-rays and covalent bonds have similar wavelength, and therefore currently provides the best visualization of protein structure.

Because x-rays and covalent bonds have comparable wavelengths, they can now give the finest imaging of protein structure because they can reveal the precise three-dimensional locations of the majority of atoms in a protein molecule.

What is X-ray crystallography?

X-ray, a scientific technique called crystallography may be used to map out the atoms of a crystalline material in three dimensions. By using most crystalline materials' interatomic gap as a diffraction gradient for x-ray radiation, which has wavelengths on the order of 1 angstrom, this method makes use of the interatomic spacing of most crystalline solids.

Wilhelm Rontgen made the discovery of x-rays in 1895. Up until 1912, there remained disagreement about whether x-rays constituted electromagnetic energy or particles. Researchers recognized that this light's wavelength would need to be in the range of 1 Angstrom (A) if the wave theory was accurate.

It would be necessary to use a gradient with separation on the same order of magnitude as the light for diffraction and measurement of such tiny wavelengths.

To diffract the x-ray beams, the arrangement of the atoms must be in an ordered, periodic form. The specific arrangement of atoms in that crystal is then revealed through a sequence of mathematical computations to create a diffraction pattern. The principal technique still in use today for studying the structure and bonding of organometallic compounds is X-ray crystallography.

Therefore, since x-rays and covalent bonds can display the precise three-dimensional locations of the majority of atoms in a protein molecule, they provide the best imaging of protein structure currently achievable.

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helppppppppppppppppppppppppppppppppppppppppppppppppppppppp

Answers

Answer:

1. a

2. b

3. b

4. c

Explanation:

Why is the temperature at the extremities, such as the fingers,
sometimes colder than the core body temperature?
O A. So that less energy is lost in cold environments.
OB. The fingers need to be colder to protect the durability of the nails.
C. The fingers do not have thermoregulation mechanisms.
D. So that more energy is lost in cold environments.

Answers

Answer:

A. so that less energy is lost in cold environments.

Explanation:

When it’s cold outside, your body makes sure to keep the blood flowing to your core and vital organs to keep them warm. This can change the amount of blood flow to your hands and feet, making them feel cold. This is normal. The blood vessels in your hands and feet constrict (spasm) when it’s cold, to prevent heat loss from your core

21. What determines the kind of genes an organism
possesses?

Answers

Answer:

The kind of genes an organism possesses is determined by the order of the nucleotide bases in the organism's DNA.

Answer:

The kind of genes an organism possesses is determined by the order of the nucleotide bases in the organism's DNA. ... The order of bases as you go down the rungs of the ladder determine what genes an organism will have, and therefore, what traits it will have.

Explanation:

Fun facts:

Genes carry the information that determines your traits which are features or characteristics that are passed on to you — or inherited — from your parents. Each cell in the human body contains about 25,000 to 35,000 genes. ... And chromosomes are found inside cells. Your body is made of billions of cells.

10. Which process uses special proteins on the surface of the membrane
to identify specific molecules for transport into the cell?
a. phagocytosis
b. pinocytosis
C. receptor-mediated endocytosis
d. exocytosis

Answers

Answer:

C. Receptor-mediated endocytosis

which method of evolution best defines the figure:


A. fossilization

B. non-random mating

C. natural selection

D. gene flow

Answers

Answer:

C) Natural Selection

Explanation:

Suppose that you are able to sequence a portion of Dr. Ogden's genome. The DNA sequence below is a stretch of one of the genes.

TAC CGT ATA AAA AAT TAA CTT AGA CGT GCT CTT TCT CTT CGA GAA GAC ATA TTA CTT CGT TGA ATC
Given the DNA sequence above type the mRNA processed transcript (assume that TCT CTT CGA GAA GAC ATA is an intron).

Answers

Answer:

huh

Explanation:

fam what is that

The mRNA processed transcript will be: AUG GCA UAU UUU UUA AUU GAA UCU GCA CGA GAA AAU GAA GCA ACU UAG.

What is transcription?

In genomics, transcription is the method of generating an RNA copy of a gene's DNA sequence. This copy, known as messenger RNA (mRNA), transports the protein information encoded in the gene's DNA.

This RNA copy, known as messenger RNA (mRNA), contains the genetic information required for a cell to produce proteins.

It transports information from the cell's nucleus to the cytoplasm, where proteins are produced.

The entire gene is copied into a pre-mRNA, which includes exons and introns, during transcription. Introns are removed and exons are joined to form a contiguous coding sequence during the RNA splicing process.

Thus, as the introns are getting removed completely, the mRNA sequence for the given DNA sequence will be: AUG GCA UAU UUU UUA AUU GAA UCU GCA CGA GAA AAU GAA GCA ACU UAG.

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What would you say to a friend that says "GMOs are dangerous to human health"?

Answers

Everything have both positive and negative impacts

Gmos( genetically modified organisms ) are good and dangerous both

if we carefully practice genetic engineering then it is beneficial but if we use it only for our income source without caring about its worst effects then its very dangerous

Some experts attribute the increase in ADHD diagnoses to an increased awareness of the disorder, while others attribute the increase to ______ diagnoses.

Answers

Answer:

incorrect

Explanation:

Attention-deficit/hyperactivity disorder (ADHD) is one of the most common neurodevelopmental disorders affecting children. ADHD is characterized by different behaviors that include one or more of the following symptoms: inattention (poor concentration), impulsivity (interrupting behavior) and hyperactivity (state abnormally active). It has been reported that DHD diagnoses in children between 4 and 17 years of age dramatically increased from 6 percent (6%) during the period 1997-1998 to 10 percent (10%) during the period 2015-2016. Although the causes of this increase have not been established, the American Psychiatric Association (APA) indicates that the increase might be due to the increased access of communities historically relegated to receive care and decreased stigma to be diagnosed with ADHD. Other possible causes range from chemical factors to unhealthy habits during pregnancy (e.g., smoking, substance abuse, poor nutrition). On the other hand, it has also been proposed that this increase may be as a result that ​ADHD is often misdiagnosed and confused with other conditions (e.g., bipolar disorder, autism, kids being kids, etc).

3.4 Highlight why it is important to evaluate impact assessment studies before any
development could be made on the environment.​

Answers

Answer:

EIA is a tool that ensures the protection and conservation of the environment and natural resources and ensures a sustainable economic development for any project under construction. ... EIA studies the effect of the surrounding environment on the project as well as the effect of the project on the surrounding environment.

hope it helps

What is stimulated by high extracellular fluid volume (ECFV) and works to increase GFR and urine output?

Answers

Stretching of the atrial muscle cells releases a hormone called atrial natriuretic factor (ANF). ANF relaxes the juxtaglomerular (JG) cells of the afferent arteriole and thereby increases GFR and urine output.

Here can you help me on this?

Answers

Answer:

Selective breeding

Selective breeding is when u choose 2 organisms with certain desirable characteristics and bread then together

Animals are selectively bread 4 many reasons

- To have a higher yield (meat, milk, eggs)

- Be able to run faster

which of the following makes its gravitational pull increase ?

Answers

Answer: The mass decreases

Explanation:

Fevers (below 102ºF):

a
Damage essential proteins in your body
b
Inhibit the growth of pathogens and stimulate macrophage action
c
Occur late in the disease process, after the pathogen is almost eliminated
d
Require emergency treatment

Answers

Answer:

Inhibit the growth of pathogens and stimulate macrophage action

The correct answer is B

which leaf carries out more photosynthesis and explain why

Answers

Answer:

Explanation:

palisade layer

The upper, palisade layer captures most of the sunlight and carries out most of the photosynthesis. The columnar cells of the palisade layer contain many chloroplasts.

Why must living organisms reproduce?

Answers

Answer:

reproduction it's important for the survival of all living organisms

Answer:

Reproduction is necessary for the continuation of the generation of particular species rather than the species extinct from the earth. It is also a source of recombination.

Explanation:

In the population of plant K, each plant has only red flowers or only white flowers. A farmer collected the seeds from plant K with red flowers to grow new plants. Explain why the new plants will have only red flowers

Answers

Answer:

nose

Explanation:

nosenosenosenosenosenosenosenosenosenosenose

The new plants will have only red flowers because the trait for red flowers is determined by a dominant gene, and all the plants in population K have the same homozygous genotype for the flower color.

In genetics, the flower color trait in population K is determined by genes present in the plants' DNA. There are two alleles, or gene variants, for the flower color: one for red flowers (let's call it R) and one for white flowers (let's call it r). The gene for red flowers (R) is dominant, meaning that even if only one copy of the gene is present in an individual's genotype (heterozygous), it will produce the red flower phenotype. On the other hand, the gene for white flowers (r) is recessive, which means it will only produce the white flower phenotype if two copies are present in the genotype (homozygous recessive).

In population K, all the plants have only red flowers, indicating that they must have the genotype RR. Since all the plants are homozygous for the dominant red flower gene (RR), when they reproduce, they can only pass on the dominant allele R to their offspring. As a result, all the new plants that grow from the seeds collected from these plants will also have the genotype RR and, therefore, express the red flower phenotype.

Since there are no plants in population K with the genotype rr (homozygous recessive), which is necessary for white flowers, there is no chance of white-flowered plants appearing in the new generation. Thus, the new plants will have only red flowers due to the uniformity of the homozygous dominant genotype in the original population.

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