The Cambrian period. Cambrian explosion, the unparalleled emergence of organisms between 541 million and approximately 530 million years ago at the beginning of the Cambrian Period. The event was characterized by the appearance of many of the major phyla (between 20 and 35) that make up modern animal life.
If flying squirrels were brought to Australia, what do you predict would happen
Compare the size and depth of an acetabulum of a hip bone to the glenoid cavity of the scapula.How do these socket differences between the hip joint and the shoulder joint relate to strength and mobility?
Hip joint: It has the presence of ligaments that provides it strongness and musculature. because of these ligaments, allows the 180° movements of the legs. As the leg is used for running or much more physically intense activities the joint between the pelvis and femur that is the ball and socket joint gets so much pressure and stress, but due to its strong reinforcement by the ligaments, it becomes more flexible and strong.
Shoulder joint: As it is located in the scapula and also has the ball and socket joint it provides mobility as we can stretch our arm, and use it for throwing many things so this shows that it has mobility, but this reduces the stability by causing the rotatory injuries. Always remember that shoulder is in the shoulder blade which is mobile and this makes it risky and susceptible to injuries.
Conclusion: The scapula has mobility and we can see the upward and downward movement in it so this makes the shoulder joint more mobile but less stable as compared to the hip joint which has more stability.
Explain the dual nature of light. Describe its particle-like properties. Describe its wavelength properties. Describe the electromagnetic spectrum.
The dual nature of light is the property of light where it has both wave and particle properties.
The wavelength properties of light are such that light behaves as a set of electromagnetic waves that have different wavelengths.
The electromagnetic spectrum is the whole range of frequencies and wavelengths of electromagnetic waves.
What is the wave-particle dual nature of light?The wave-particle dual nature of light is the property of light where it has wave-like properties such as reflection, refraction, diffraction, etc., and also has particle properties such as the photoelectric effect.
The wavelength of light is the distance between successive points in the wave.
The whole range of frequencies and wavelengths of light gives the electromagnetic spectrum.
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3. How might the changes that you identified affect the protein’s structure?Example: The change would likely have no effect. Neither valine and isoleucine would promote hydrogen bonding with water, because their R groups are nonpolar and thus hydrophobic.Changes spotted in the previous question:1. Valine changed for Isoleucine: there was not a change in the chemical properties, because both amino acids have non-polar chains2. Valine changed for Alanine: there was not a change in the chemical properties, because both amino acids have non-polar chains3. Glutamate changed for Alanine: there was a change because the aminoacidic chain lost their electronegativity4. Glutamate changed for Aspartate: there was not a change because the aminoacidic chain kept it's electronegativity.1) _______________________________________________________________2) _______________________________________________________________3) _______________________________________________________________4) _______________________________________________________________
In the previous exercise we spotted that in the sequences there were at least four changes in the aminoacidic sequences:
1. Valine changed for Isoleucine: as indicated by the very exercise, there wouldn't be a negative effect, because both amino acids have hydrophobic radical groups.
2. Valine changed for Alanine: like in the previous case, there wouldn't be a negative effect, because both amino acids have hydrophobic radical groups.
3. Glutamate changed for Alanine: there would be a change in the protein structure because Glutamate can form hydrogen bonds, and Alanine doesn't.
4. Glutamate changed for Aspartate: there wouldn't be a change in the protein structure because both amino acids can form hydrogen bonds.
If a corn plant had Yellow kernels and a smooth seed shape, what could it's possible genotype be? Choose all that apply
Corn kernels' color and shape are coded by diallelic genes expressing complete dominance. The genotype of individuals carrying Yellow kernels and a smooth shape phenotype can be either ppSS or ppSs.
What is complete dominance?
Complete dominance refers to the inheritance pattern in which the dominant allele of a gene completely masks the expression of the recessive allele.
The presence of at least one dominant allele is enough to express the dominant trait. This becomes evident in heterozygous individuals.
In the exposed example, two traits are involved. One of them is the kernel color and the other one is the kernel shape.
Genes coding for each of the traits express complete dominance,
P codes for purple and is dominant over p that codes for yellow.S codes for smooth and is dominant over s that codes for wrinkled.If a corn plant had Yellow kernels and a smooth seed shape, it is expressing the recessive phenotype for color (pp) and the dominant phenotype for shape (SS or Ss), so the possible genotypes are,
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Complete question
In corn, purple kernels are dominant to yellow kernels, and smooth kernels are dominant to wrinkled kernels.
The following letters were selected to represent each of the possible alleles:
Color
Purple kernels: P Yellow kernels: pKernel shape
Smooth kernels: S Wrinkled kernels: sIf a corn plant had Yellow kernels and a smooth seed shape, what could it's possible genotype be? Choose all that apply.
Group of answer choices
PPSSPPSsPPssPpSSPpSsPpssppSSppSsppssWhich of these statements best describes what scientists do?
• study things only in nature
• explain events that occur in space
• experiment to solve problems in space and the world around us
• design strong bridge architecture
Answer: experiment to solve problems in space and the world around us
The purpose of scientists is to try and understand why things in the universe, including the earth and other bodies in space, work and behave the way they do and for what purpose.
prophase of meiosis i has some important differences from prophase of mitosis. these differences include: ______ pair, and ______ occurs.
The prophase of meiosis I have a few essential variations from the prophase of mitosis. those differences include Homologous chromosomes pair, and crossing over takes place.
Mitosis is the department of frame cells and meiosis is the division of the sex cells or gametes-producing cells.
Mitosis is a process wherein a single cell divides into identical daughter cells. Whereas Meiosis is a technique in which a single cell divides twice to produce 4 cells containing 1/2 the initial quantity of genetic materials.
Meiosis I, the primary meiotic division, begins with prophase I. For the duration of prophase I, the complex of DNA and protein referred to as chromatin condenses to shape chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at the center known as the centromere.
Prophase is the primary segment of mitosis, the manner that separates the duplicated genetic material carried within the nucleus of a discern cell into identical daughter cells. During prophase, the complex of DNA and proteins contained inside the nucleus referred to as chromatin condenses.
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How do humans obtain the minerals needed for the body to function properly?
A.They get them from the water they drink.
B.They take mineral supplements daily.
C.They eat small amounts of rocks to get what they need.
D.They eat healthy foods like meats, vegetable, fruits, and dairy
Answer:
Explanation:
You are supposed to pick D, but that does not eliminate B. Some people do take mineral supplements to keep their mineral needs balanced. Things like Magnesium, Iron Calcium, and others are not in every food you may choose has every ingredient you may need.
I think I would answer D, but don't be surprised if the poser of the question says it is B.
Wind flows from an area of high air
pressure (more air) to an area of low
air pressure (less air). Why does wind
do this? What process is this an
example of?
Answer:
a
Explanation:
I need help with this answer it’s a bit tricky
Correct option is number four, all current organisms share a common ancestor. Which is one of the backbones of its evolutionary thinking.
How to primarily classify viruses?
Answer:
They are classified based on their host.
Explanation:
Virus Classes: animal viruses, plant viruses, and bacteriophages.
When two gametes (such as an egg and sperm) combine, the process is known asasexual reproduction.embryogenesis.fertilization.parthenogenesis.
When these two gametes (an egg and a sperm) combine with each other, the process is known as fertilization (as we can see in the third answer option), and this is achieved by these two sexual cells by a set of physiological reactions in which both cells are involved, for example, they can chemically attract between each other. After this process, also known as fecundation, there would be the formation of a zygote, which will end in the formation of an embryo after embryogenesis. We can see this graphically in the picture below, where there're a sperm and an egg with their parts.
5. Which of the following is NOT a part of a nucleotide?a.A phosphate groupb.A sugarc.A base paird.A nitrogenous base
The correct options are:
A. A PHOSPHATE GROUP
B. A SUGAR
D. NITROGENOUS BASE
These molecules comprise the nucleotide. The nitrogenous base in DNA could either be adenine, guanine, cytosine, and uracil; however, thymine will be replaced by uracil in RNA. Its sugar will be either a ribose (RNA) or deoxyribose (DNA).
Which of the following is NOT part of a cell membrane?
Hydrophobic tail
nitrogen
hydrophilic head
Phosphate
Proline is not a constituent of the cell membrane.
What constitutes a cell's components?The cell membrane, the nucleus, and the cytoplasm sandwiched in between make up a cell. Organelles, which are little but separate structures, are arranged in complex patterns throughout the cytoplasm, which contains hundreds or even thousands of them. A lipid bilayer that is semipermeable makes up the cell membrane.
Lipids (phospholipids and cholesterol), proteins, and carbohydrates make up the majority of the plasma membrane. The extracellular environment is shielded from intracellular components by the plasma membrane. By controlling the substances that enter and leave the cell, the plasma membrane facilitates biological activities.
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In order to maintain a high concentration of
potassium inside a cell (with a low
concentration outside) which of the following
must occur?
O passive transport
O active transport
O diffusion
O osmosis
Answer:
Passive transport does not require the cell to expend energy and involves a substance diffusing its concentration gradient across a membrane.
Sorry for the bad English, love from Vanuatu!
Explanation:
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1. Where is the thalamus located?
A.The cerebellum
B.The cerebrum
C.The brain stem
D.The diencephalon
D. the diencephalon is where the thalamus is located
Is resource availability the onlyfactor affecting carrying capacity?A. Yes, resources are the only factor affectingcarrying capacity.B. No, changing seasons and disease also affectcarrying capacity.C. No, predation and omnivore activity affectcarrying capacity.
Let's first define what carrying capacity is:
Carrying capacity is the maximum amount of organisms an ecosystem can carry. It is related to our logistical growth formula:
[tex]\frac{dN}{dt}=r_{max}(\frac{K-N}{K})N[/tex]Where K is our carrying capacity.
Carrying capacity is affected by a couple of things:
0. Resource availability,: depending on how many resources there are in an ecosystem, it can only hold so many organisms.
,1. Space,: depending on how ,large, an ecosystem is, the denser the ecosystem (of organisms), the harder it is for the organisms to coexist. Therefore, the smaller the area, the lesser the carrying capacity.
These 2 factors (resources being biotic and space being abiotic) are the only factors few factors that affect carrying capacity.
Therefore, our best answer choice is A.
You are trying to determine the cause of Albinism in Gorillas. You begin by isolating the gene for skin pigment in a normal gorilla (sample 1) and in an albino gorilla (sample 2). You compare them to see what is different. Sample 1: ATTACAGTACTGGCA Sample 2: ATTACAATACTGGGCALooking at the sequences carefully you determine it is a __________ mutation.A. SubstitutionB. InversionC. InsertionD. Deletion
Here we are comparing the DNA sequence of the gene for skin pigment in a normal gorilla (sample 1) and an albino gorilla (sample 2).
The sequences are the following:
Sample 1
ATT ACA GTA CTG GCA
Sample 2
ATT ACA ATA CTG GGC A
We can see that the sequences have different lengths, sample 1 has a length of 15 base pairs (bp), while sample 2 has 16 bp. This means there is an extra nucleotide, so this is an insertion mutation.
This means the correct answer is C. Insertion
1. In animals, fertilization is to zygote as meiosis is to which of the following?
In animals, fertilization is to zygote, as meiosis is to (5) gamete.
Fertilization is the process of fusion of the male and the female gamete in order to form new organism which is diploid in nature. This process occurs only in the sexual mode of reproduction and unlike asexual reproduction, presence of two parents is essential in this.
Gamete is the germ cell that is involved in the process of sexual reproduction, in order to give rise to a new organism. Gamete is haploid in nature because it fuses with another gamete of the opposite sex in order to establish the diploid nature.
The question is incomplete, the complete question is:
In animals, fertilization is to zygote as meiosis is to which of the following?
mitosisdiploidchromosomereplicationgameteTo know more about gamete, here
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which form of water has the least energy, but is not the densest form of water?
1. Solid (ice)
2. Salt water
3. Gas (water vapor)
4. Liquid
look at the picture
According to the given statement The average atomic mass of rubidium is 85.468 .
What is atomic mass?The average mass of an element's atoms measured in atomic mass units is known as its atomic mass (amu, also known as daltons, D). The mass of each isotope is divided by its abundance to create the atomic mass, which is a weighted average of all the atoms of that material.
Briefing:Given that the abundance of the ⁸⁵Rb isotope is 72.17% and its atomic mass is 84.912amu
We get 84.912 x 0.7217 = 61.281
And the abundance of the isotope ⁸⁷Rb, having an atomic mass of 86.909, is 27.83%.
We get 86.909 x 0.2783 = 24.187
Thus we get 61.281 + 24.187 = 85.468 as the average atomic mass of Rubidium.
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The complete question is -
Calculate the average atomic mass of rubidium. Rubidium has two isotopes, ⁸⁵Rb and ⁸⁷Rb. 85Rb has an atomic mass of 84.912 amu and occurs at an abundance of 72.17%. ⁸⁷Rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%. Show your work.
Which of the following areas of study would be in the branch of earth science
• habitats or behaviors
• rocks or minerals
• heat or motion
• bacteria or cells
Answer: rocks or minerals
Rock or minerals are in the branch of earth science. It deals with natural chemicals and materials on the earth, and rocks and minerals fit into the category as geology is one of the main areas of earth science.
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Explain why humans need to eat food to survive and list the macronutrients needed in a healthy diet.
Food gives important nutrients to the human body. A healthy diet is vital for good health and nutrition. These nutrients are used for energy, cell growth, and repair. Food controls the immune system. Poor diets leads to various health problems. Food defends the human body from chronic noncommunicable diseases. Eating different kinds of food and taking less salt, sugar and saturated fats are needed for a healthy diet.
Macronutrients are consumed in large amount and carry the primary buliding blocks of our diet which are the protein, carbohydrates, and fat. These provides our body the energy it needed. Small doses of vitamins and minerals which are considered as macronutrients goes a long way.
The following are the 6 essential macronutrients:
1. protein
2. carbohydrates
3. fats
4. vitamins
5. minerals
6. water
Question 3 of 10Which of the following accurately describes a trade-off of using biomass as afuel?aA. Biomass produces no air or water pollution but is expensive tocollectB. Biomass is inexpensive but nonrenewable.C. Biomass is easy to produce but generates radioactive waste.D. Biomass is inexpensive and easy to produce but generates airpollution
The correct option is D. Biomass is inexpensive and easy to produce but generates air
pollution. Biomass burning might generate carbon dioxide, among other gases, which would counterattack the climate change goals, such as carbon dioxide mitigation.
PLEASE HELP!! WILL GIVE BRAINESTWhich of the following is the desired outcome of attaching streamers to the back of boats?Keeping birds from becoming tangled in fishing lineProviding habitat for lobstersReducing overall bycatch from drift nettingRemoving floating debris from the water
Answer:
Keeping birds from becoming tangled in fishing line.
How does the cerebral spinal fluid (CSF) protect the spinal cord?
The cerebrospinal fluid provides hydromechanical protection, acts as a mechanical shock absorber, makes the spinal cord and brain become buoyant (reduce the effective weight), as well as provide nutrients to the central nevous system. Being an important form of protection to the central nervous system.
What would be the result on daughter cells if a cell did not complete S phase properly?
Answer:
The growth of all cells is governed by the cell cycle, including cell division. Before a cell can divide, many processes must occur, including the proper duplication of the chromosomes. The cell cycle ensures that all of these processes occur normally, otherwise the cell ceases to progress and could die
Need help with this question will global warming have catastrophic effects?
Global warming is predicted to produce an increase in extreme temperatures and it is caused mainly by an increase in CO2 levels. The increasing temperatures are likely to cause a modification in air circulation patterns and increase evaporation, among others. These have consequences over climate and produce an increment over frequency and magnitude of extreme climatological events (like hurricanes). Also, global warming leaves no place for adaptation (as it is fast compared to biological adaptation), so many species are likely to go extinct, with important ecological effects. I consider these to be catastrophic effects.
9. During which phase does the DNA make
a copy of itself?
a. prophase
b. metaphase
c. interphase
d. anaphase
Answer: A
Explanation:
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A man (A+) and a women (B+) are expecting a baby together. Make a two-trait (dihybrid) Punnett square and determine the probability of each blood type in their offspring. A+ ___:16B+ ___:16AB+ ___:16O+ ___:16A- ___:16B- ___:16AB- ___:16O- ___:16
A+ _3__:16
B+ __3_:16
AB+ _3__:16
O+ _3__:16
A- _1__:16
B- __1_:16
AB- _1__:16
O- __1_:16
