Answer:
pure substance describe that atom is made up of only one type of atom.
Answer: A pure substance is something that occurs in nature.
Explanation: An element is made up of one type of atom only and cannot be spout further. A compound has the combined properties of the elements from which it is made. Atoms show the macro properties of an element
Use the following information to answer the following question(s).The dune-burrowing spider Seothyra sp. lives in the Namib desert on the southwestern coast of Africa. These spiders build silk-lined burrows with a sticky silk mat at the entrance to trap insect prey. While foraging during the day, the spider remains concealed in its burrow and shielded from direct sunlight when prey are not present.During the day, environmental temperatures vary from 17 to 73°C (63-164°F). If a spider is prevented from retreating into its burrow, it shows signs of thermal stress at 49°C, whereas unrestrained spiders continue to forage at temperatures above 65°C. In addition, spiders respond more quickly to prey stimuli during the hottest times of the day and capture prey in significantly less time when temperatures are above 49°C. The captured arthropods (prey) tend to succumb more quickly to hot surface temperatures; they are more lethargic and struggle less when captured at the high temperature ranges.1. Based on the information in the paragraphs, spiders are ______.a. endothermsb. ectothermsc. sometimes ectotherms and sometimes endothermsd. neither ectotherms nor endotherms2. In animals, individual cells are grouped into _____.a. organismsb. organsc. organ systemsd. tissues3. A main function of most types of epithelial tissue is ______.a. supportb. absorptionc. sensationd. covering surfaces4. Reabsorption is the movement of substances from the ______ to the ______a. blood... filtrateb. kidney... urinary bladderc. blood... nephrond. filtrate... blood5.In humans, goosebumps are a vestige of a mammalian adaptation related to ______.a. thermoregulationb. water conservationc. positive feedbackd. osmoregulation
Answer:
spiders are. generally ectotherms.Their internal temperature depends on external temperature transfer.They are also poikilothermic because the body temperature varies with that of the external environment.,
In animals, individual cells are grouped into tissues. e,g Blood. The tissues gives rise to organs.
A main function of most types of epithelial tissue is covering surfaces.They line major all hollow surfaces, and covering body surfaces.
Resorption id the movement of fluid from the glomerular filtrate back into the blood. Ions, glucose,and other escaped metabolites are returned to the blood stream.
In humans, goosebumps are a vestige of a mammalian adaptation to thermoregulation. This is a thermoregulatory mechanism to regulate the body temperature,Goosebumps emits heat, to turn the moisture from the skin to vapour. This evaporate to release this moisture, which cools the body.
Explanation:
_________12. The calvin cycle begins when CO2 react with
A. Phosphoglycerate C. Glyceraldehyde-3-phosphate
B. Ribulose biphosphate D. Phosphoenol pyruvate
Answer:
B. Ribulose biphosphate
Identify different carbon pools.
Answer:
Biosphere
Atmosphere
Oceans
Soil Organic Matter
New technologies could improve conditions for all societies. However,
priorities are different in different parts of the world. Which is the most
important goal of technology in societies in the United States and Europe?
O A. Developing new sources of clean drinking water
O B. Designing artificial habitats for use in space exploration
O C. Producing more food for a growing population
O D. Treating the diseases of an aging population
seaweed belongs to which earths sphere
Answer:
Biosphere
Explanation:
Biosphere is the sphere of Earth where the living beings stay.
Answer:
(B). Biosphere
Explanation:
just took quiz
Organisms adopt different strategies and structures to make sure their offspring survive. Match each species with the reproductive strategy or structure it uses. elephant Answer 1 frog Answer 2 pine cone Answer 3
Answer/Explanation:
From the diagram attached below, we can match the reproductive strategy or structure each species uses which ensures the survival of their offspring as follows:
1. Elephant => herds young in to center of group
The Elephant usually keep their young ones at the middle of the herds to prevent their young ones from being preyed on easily by predators.
2. Frog => Pduces many offspring at once to protect against high predation risk
The young one of frogs are easily preyed on by predators, and as such, to ensure more of their offspring survive, they produce so many offspring in a breeding season, in order to increase thee survival of their offspring to the next generation.
3. Pine cone => Protects offspring until environmental conditions are ideal for growth
thermometer measures air temperature. The second thermometer
has a wet bulb. As water evaporates from the wet bulb, its
temperature decreases relative to the air temperature.
1. Do you think the wet bulb will cool down more on a dry or humid day?
how will the lever of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle
Answer: The amount of carbon dioxide will keep on increasing in the atmosphere because there are various sources by which it can be released into the environment. The burning of fossil fuel, emission from vehicles, gases released from industries contributes to the increase in amount of carbon dioxide in environment.
Explanation:
In a rabbit, B is the allele for a black coat and b is the allele for the brown coat, what is the genotype of a brown coat
A)bb
B) Bb
C) BB
The correct answer is A) bb
Explanation:
In genetics, an allele is a variation of a gene, which often determines a physical trait. Alleles are classified as dominant if they express even when there are other alleles or as recessive if two copies of the same allele are needed for the gene to express. Moreover, in genetics dominant alleles are represented by uppercase letters while recessive alleles are represented by lowercase letters.
In this context, the allele that is responsible for the brown coat in rabbits is a recessive allele, considering this is represented by lowercase b. This means two copies of the allele are necessary for the rabbit to have a brown coat and therefore the genotype of a brown coat is bb. Also, others such as Bb and BB have the dominant allele related to the black coat, and therefore will lead to rabbits with a black coat.
Compared to our solar system, the universe is
1.
younger, smaller, and contains fewer stars
2.
younger, larger, and contains more stars
3.
older, smaller, and contains fewer stars
4.
older, larger, and contains more stars
With named examples of snails, discuss any three marketable characteristics of snails and their possible uses.
Answer:
Land snails, sea snails and fresh water snails are the main types of snails with over 40,000 different species in the world.
A Snail comprises of a high percentage of protein when compared to fat making it a good source and healthy meal for the cardiovascular parts of the body.
They also contain essential vitamins and minerals such as necessary for the metabolism of the body such as calcium, iron, selenium, magnesium and vitamins A,B12,E and K which help as strong antioxidants.
They also contain vitamin minerals which helps to boost the immune system.
Which molecular formula corresponds to this model of a chemical compound? (black = carbon; red = oxygen; white = hydrogen) A ball-and-stick model has two black balls bonded to each other at center, with single-bonded red balls bonded to white balls above left and below right, and double-bonded red balls above right and below left. C2(OH)4 C2H2O4 C2H4O2 C4H2O2
Answer:
C2H2O4
Explanation:
The molecular formula corresponds to this model of a chemical compound is to be considered as the C2H2O4.
Molecular formula:Since
Two black balls (C) bonded to each other at the center = C2
And,
Single-bonded red balls (O) bonded to white balls (H) above left and below right = (OH)2 = O2H2
And,
Double-bonded red balls above right and below left = O2
So if we add this
So it comes
= C2 + O2H2 + O2
= C2H2O4
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Which of the following is true about reproduction. That involves meiosis?
Answer:
Mitosis is true about reproduction that involves Meiosis. Somatic cells are segregated to produce the replica of same. This is the way skin and other body places are thoroughly replaced.
Explanation:
Answer:
Reproduction is the biological process by which new individual organisms "offspring" are produced from their "parents".
True
Explanation:
Researchers are working to develop biofuels to free us from dependence on fossil fuels. Based on what you know about cellulose, what do you predict are the major advantage and disadvantage of using cellulose-rich plant material as biofuel?
Answer:
Cellulose is a macro molecule with high storage of energy lodged in its molecules.Therefore, this high energy content is a good advantage for Biofuel.
However, the mass e of the hydrogen bonds holding it molecules makes it difficult to undergo hydrolysis to glucose. This is a disadvantage which may affect the production of biofuel from cellulose.
Explanation:
Puerto Rico, Cuba, Jamaica, and Hispaniola have species of anole lizards with distinct body types, including the grass lizards, which have long tails; the canopy lizards, which have large toe pads; and the twig lizards, which have short legs. Anole species with each of these three body types exist on each of the:_________
Answer:
four islands.
Explanation:
Anole lizards includes different types of lizards such as the canopy lizards, the grass lizards and the twig lizards and are found in Puerto Rico, Cuba, Jamaica, and Hispaniola.
Anole species with each of these three body types exist on each of the four islands because of interisland migration events.
The anole species share common ancestor with each other in comparison to other lizard species, interisland migration events allowed anole species to get evolved by natural selection process in different islands including Puerto Rico, Cuba, Jamaica, and Hispaniola.
Hence, the correct answer is four islands.
How is an invasive species introduces to a new ecosystem?
An invasive species is introduced to an ecosystem through a ...(fill in the black)
Answer:
.An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental
Explanation:
The result of invasive species can be very complex due to the result of economic harm the organism may cause to an environment it is not originally from if that makes sense.
what enhances the satability of mRNA
Answer:
Promoter Strength
Explanation:
More than increasing mRNA stability, the promoter strength can be tuned to increase the gene expression by producing more quantities of the mRNA. The strength is based on efficient promoter recognition and rapid binding of the DNA polymerase.
hope it helps : )
Answer:
Promoter Strength
Explanation:
A promoter is a DNA sequence that can recruit transcriptional machinery and the sequence promoter is what determines the strength of the promoter ( a strong promoter leads to a high rate of transcription initiation).In regards to mRNA stability, the promoter strength can be tuned to increase the gene expression by producing more quantities of the mRNA. The tuning of promoter strength is based on efficient promoter recognition and rapid binding of the DNA polymerase.
The illustration below shows the steps of meiosis I.
The steps of meiosis 1 are shown. In step A, the chromosomes pair up. In step B, the homologous pairs line up for separation. In step C, the pairs are separated. In step D, sister chromatids stay together. In step E, 2 new cells are formed.
What is the step that is labeled D?
metaphase I
metaphase II
telophase II
telophase I
Answer:
Telophase I
Explanation:
Meiosis is a kind of cell division employed by sexually-reproducing organisms to produce gametes. It involves the production of four daughter cells (gametes) that each have a reduced number of chromosomes as the parent. Meiosis occurs in a two step division (meiosis I amd II), that involves four major steps each viz: Prophase, Metaphase, Anaphase, and Telophase
In meiosis I, homologous chromosomes (similar but non-identical chromosomes received from each parent) are involved in the steps.
Prophase I- Homologous chromosomes pair up to form a TETRAD structure called synapse. This describes step A
Metaphase I- Homologous chromosomes line up at the cell's equator in order to be pulled apart by spindle microtubules. This describes step B
Anaphase I- Homologous chromosomes are pulled apart to opposite poles of the cell. This describes step C.
Telophase I- Each homologous chromosome consist of two sister chromatids, which remain together in opposite cells. This describes step D
Step E described Cytokinesis, which is the separation of the cell into two daughter cells.
Hence, step D is the Telophase I stage.
Answer:
telophase I
Explanation:
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During replication, the strands of a double stranded DNA separate when the bonds are broken between their paired bases.
Explain why, in terms of the genetic code, it is important that the molecule separated between the bases and not at some other point. (Remember the bases are letters that spell out specific traits for the organisms).
Answer:
During the process of replication, the double stranded DNA separates when several enzymes act to break the bond between base pairs in two strands.
There are four base pairs in DNA that includes thymine, cytosine, guanine and adenine. these bases determines DNA's instructions, or genetic code. The four bases are allowed to encode the sequence of amino acid residues in proteins by making a pair of three codons that carry genetic codes and helps on the process of transcription and translation.
For example: if the DNA sequence is having bases ATGCCGG, its complementary base pair will be UACGGCC, lets make pair of three codons UAC that codes for amino acid Tyrine and GGC codes for glycine.
Bases are components of nucleotide and nucleotide are the basic building blocks of DNA and RNA.
If DNA will separate from any other point then it will not able to carry the genetic code. hence, DNA separates between the bases only.
It is important that the molecule is separated between the bases and not at some other point because nucleotide order is fundamental to obtain two genetically identical DNA molecules.
What is DNA?DNA is a self-replicating molecule that is fundamental for life by assuring of the perpetuity of the genetic material.
During DNA replication, different enzymes act to produce two genetically identical DNA molecules.For this purpose, enzymes must copy with absolute fidelity the order of the nucleotide sequence in the DNA molecule.In conclusion, it is important that the molecule is separated between the bases and not at some other point because nucleotide order is fundamental to obtain two genetically identical DNA molecules.
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20 words about body, health, or disease.
Excluding plasma, which state of matter has the most kinetic energy?
Answer:
Gas
Explanation:
Gas has the most kinetic energy.
Gas has the most energy than the solid ones.
Three states of matter
1: solid
2: liquid
3: Gas
Hope this helps.
Someone help me please with those questions please
In social psychology, the tendency for people to be less likely to offer help when they are in the presence of others than when they are not is known as: 1) negative state relief. 2) the Good Samaritan effect. 3) pluralistic ignorance. 4) the non-altruistic effect.
Answer:
3
Explanation:
you can Google all of these and add the word definition at the end of each and it will give you the definition
How does filtration occur during the formation of urine ?
Each of your kidneys is made up of about a million filtering units called nephrons. Each nephron includes a filter, called the glomerulus, and a tubule. The nephrons work through a two-step process: the glomerulus filters your blood, and the tubule returns needed substances to your blood and removes wastes.
if you denature a protein, you increase the ability to react. true or false
Answer:
False
Explanation:
Denaturing a protein involves deforming its shape by removing it from its optimum temperature, pH, salinity, etc. This decreases its efficiency because its optimum shape is not present, meaning that its ability to react is decreased.
The amoeba is a protozoan that moves with _____.
Answer:
Pseudopod
Explanation:
b) Some features can only be found in plant cells. Name two of them.
1.
2.
Answer:
a cell wall, a large central vacuole
Explanation:
Most organelles are common to both animal and plant cells. However, plant cells also have features that animal cells do not have: a cell wall, a large central vacuole, and plastids such as chloroplasts.
define ecological pyramid and indicate the limitations of ecological pyramid
Answer:
Ecological pyramid is a graphical representation showing the biomass or bioproductivity at each trophic level in a given ecosystem.
Limitations
The ecological pyramid does not take into account the same species belonging to more than one trophic level.
Can someone help me with this 3 questions please
Answer:
- the answer for the exercise 6 is water
- the answer for the exercise 7 is population
- the answer for the exercise 8 is ecosystem
What have a heart but doesn’t beat
Answer:
The King of Hearts in Deck of Cards is the answer to this riddle
Explanation:
