Giant land tortoises of the Galapagos Islands have long necks as a result of natural selection, giving them a survival advantage in environments where food is scarce and positioned higher. Over time, long-necked individuals are more likely to survive and reproduce, passing on this advantageous trait.
The giant land tortoises of the Galapagos Islands and the sequoias of California possess some of the longest lifespans of any organisms on Earth. This indicates that they likely employ a strategy of natural selection, where traits beneficial for survival in their environments are passed down through generations. For the Galapagos tortoises, a notable example is the variation in neck length. Tortoises with longer necks were 'selected' in environments where food sources were higher off the ground. During droughts or in areas with sparse vegetation, these tortoises could access food that short-necked tortoises could not, thus having a better chance of survival and reproduction. Over time, the trait of having a long neck would become predominant in the population due to this selective advantage.
Proteins are made from amino acids. An amino acid has three parts that are joined to a central carbon atom. Identify the three parts that create an amino acid.
Amoebas are unicellular organisms, while human beings are multi-cellular and the most intelligent of organisms. However, both are classified as eukaryotes. How will you justify this reasoning?
Jack observes the development of frog eggs. During his observations, he noticed that within a few hours of fertilization, the single-celled zygote went through a series of cell divisions. Which of these is the best interpretation?
A. gastrulation
B. blastulation
C. cleavage
Which of the following describes a population that is distributed evenly across an area A.random B.uniform c.clumped d.crowded
how do bone cells adapt to their job ...?
There is no difference between the question and hypothesis steps of scientific inquiry. Please select the best answer from the choices provided T F
Correct answer: False
The question provides the question that is to be studied while the hypothesis gives a proposed answer to the question. The research question deals with the qualitative analysis which is based on the data collection and its analysis while the hypothesis deals with the quantitative analysis.
A research question is a hypothesis that is asked in the form of the question while the hypothesis is always declarative sentence and it relates general or specific variables.
Hence, the correct answer would be ''False''
The main source of energy for reactions that occur in all living organisms is _____.
A. adenine
B. ADP
C. ATP
D. phosphate
ATP is the answer....
what is the best description of the difference between predation and parasitism
Answer:
Predators typically kill their victim whlie parasites want to keep their victim alive
Explanation:
what base in mRNA can only join with the adenine base of RNA? uracil base of tRNA
The reaction involved in cellular respiration is similar to that involved in the burning of fossil fuels. What must be an essential component of fossil fuels?
A) oxygen
B) water
C) carbon
D) carbon dioxide
The correct answer is option C
The reaction of cellular respiration and burning of fossil fuel needs carbon. Fossil fuel are like coal is made up of carbon. Organic compounds are made up of carbon(abundant), hydrogen and oxygen in small amounts.
The cellular respiration is the process by which the body obtains energy in the form of ATP by the breakdown of carbohydrates which is also a carbon compound.
Answer:
The correct answer is option C, Carbon
Explanation:
In cellular respiration, a higher carbon molecule i.e glucose breaks down in the presence of oxygen to produce carbon dioxide, water and energy. The chemical equation for cellular respiration is given below –
C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP
Like wise, in combustion of any fuel , the higher carbon molecules burn in the presence of oxygen to release gases like carbon dioxide methane etc.
Thus, a fossil fuel must be made up of carbon.
What happens during anaerobic cellular respiration?
Check your answers by clicking all of the items you included in your explanation.
Lactic acid fermentation may occur.
Cells covert pyruvic acid into lactic acid.
NADH is converted to NAD+.
No additional ATP is produced after glycolysis.
Alcohol fermentation may occur.
Cells convert pyruvic acid to carbon dioxide and alcohol.
The energy needed for body's internal activities when at rest is your Active Metabolic Rate.
True
False
Minerals come from organic materials.
true or false
The answer would be false because minerals are inorganic meaning they occur naturally and are non living
a dihybrid cross between 2 heterozygous parents produces a phenotypic ratio of?
A dihybrid cross between two heterozygous parents produces a phenotypic ratio of 9:3:3:1, which reflects the independent assortment of genes and dominance of certain traits.
Explanation:A dihybrid cross between two heterozygous parents (e.g., GgYy x GgYy) involves two genes and produces offspring with a combination of traits that follow a phenotypic ratio of 9:3:3:1. This means that in the context of pea plants with two traits such as seed shape and color, 9/16 of the plants would exhibit both dominant traits (round, yellow seeds), 3/16 would exhibit one dominant and one recessive trait (round, green seeds or wrinkled, yellow seeds), and 1/16 would exhibit both recessive traits (wrinkled, green seeds). These proportions can be visualized using a Punnett square and result from the principles of independent assortment and dominance in genetics.
Being nocturnal is an adaptation that plants and animals use to deal with water scarcity and dry climate. Which biome is likely to have the maximum number of nocturnal animals?
A.Grassland
B.Rain Forest
C.Coniferous Forest
D.Desert
What do all wetlands have in common?
A. They lack life-forms.
B. They are highly polluted.
C. They are swamps.
D. They recycle nutrients into the soil.
The answer is D. they recycle nutrients into the soil
The correct answer is option D. They recycle nutrients into the soil.
The wetlands are the water the land water bodies, which are supplied with the water seasonally or throughout the year. All the type of the wetlands can support growth of the life forms, which can be seasonal or annual. Some o the wetlands are polluted by human activities, but not all of them. Swamps are a type of wetlands.
All the wetlands are involved in the recycling of the nutrients back into the soil. A wetland system have a rich diversity of flora and fauna, which can help in filtration of various sediments from water, recycling or removing nutrients and pollutants. In the wetlands, the water also come from the runoffs, the inorganic substances present in the water can be filtered and added to the sediments.
Which of the following is not a characteristic of Arthropods that has attributed to their diversity and success?
A. Jointed appendages
B. Segmentation
C. Highly developed nervous system
D. Endoskeleton
What starts chemical changes in food??
you suspect that a chemical that you are testing in the lab is strongly acidic . what might be its ph
A chemical that is strongly acidic would likely have a pH close to 1-2. The pH scale, which measures from 0 (most acidic) to 14 (most basic), denotes acids with a pH lower than 7. Strong acids, like stomach acid, significantly change the pH of a solution rapidly due to high hydrogen ion production.
If you suspect that a chemical you are testing in the lab is strongly acidic, its pH would likely be very low. The pH scale is an inverse logarithmic scale ranging from 0 to 14 and measures the acidity or basicity of a solution. Strong acids can have pH values from about 1 to just below 7. However, extremely strong acids can even possess negative pH values. Examples include stomach acid, which has an acidic pH of 1-2, indicating a high level of acidity.
To give you context with examples, consider the following substances:
Human blood, with a pH of 7.4, is slightly basic and is considered neutral.Household ammonia has a pH of 11.0 and is a basic substance.Cherries, with a pH of 3.6, are acidic.If you were testing a chemical with a strongly acidic nature, such as stomach acid, you could expect a pH close to 1-2, comparable to the highly active chemical nature of strong acids.
what happens when a magnesium atom loses an electron in its outer energy shell? A. it has an increase in number of neutrons. B. it becomes a negative ion. C. it has an increase in the number of protons. D. it becomes a positive ion.
When a magnesium atom loses an electron from its outer energy shell, it becomes a positive ion. The correct option is D
What is electron ?An electron is a subatomic particle that carries a negative electric charge. It is one of the fundamental particles that make up atoms, along with protons and neutrons.
This is because magnesium has 12 electrons, with 2 in its innermost shell and 8 in its second shell. The outermost shell contains 2 electrons, so when one electron is removed, the atom now has 11 electrons and a net positive charge of +1.
Therefore, the correct answer is D
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The phrase “opposites attract” can be seen very clearly in A Covalent bonds B Ionic bonds C Electron bonds D Proton bonds...
The right option is; A. covalent bonds
The phrase “opposites attract” can be seen very clearly in covalent bonds.
A covalent bond is a molecular bond that occurs when pairs of electrons are shared between atoms. The bond is caused by the electrostatic attraction of their nuclei for the same electrons. When electrons are shared, it makes each atom to fill up their outer electron shell and gain stability. When two atoms of the same element share electrons through covalent bonding, the electrons are shared equally between the atoms, but if it is shared between atoms of different elements, the electron will be drawn (attracted) more toward the atom that has the higher electronegativity which will cause a polar covalent bond.
Answer:
Ionic bonds
Explanation:
I answered with Covalent bonds and was wrong and checked and it was Ionic bonds.
Which part of the cell does this illustration represent?
The right answer is Mitochondria.
Mitochondria are limited by two membranes with very different properties:
* The outer membrane is low in protein and contains a transmembrane protein, porin, which allows the passage of ions and water-soluble metabolites of molar mass <10,000 Da.
* In contrast, the inner membrane is very rich in proteins but it is almost impermeable to ions and water-soluble metabolites. These substances can only cross the membrane using transport membrane proteins (ATP, ADP and Pi are transported by this type of protein) or by more sophisticated mechanisms called shuttle.
* The space between these two membranes is called the intermembrane space.
The respiratory system works with the ______ system to add oxygen to the blood and remove carbon dioxide from the body. what is it ? circulatory,muscular,digestive, or nervous ?
Answer;
-Circulatory system
The respiratory system works with the circulatory system to add oxygen to the blood and remove carbon dioxide from the body.
Explanation;
-The circulatory system is the body's transport system. It is made up of a group of organs that transport blood throughout the body. The heart pumps the blood and the arteries and veins transport it. Oxygen-rich blood leaves the left side of the heart and enters the biggest artery, called the aorta.
-The circulatory and respiratory systems work together to provide body cells with oxygen which is essential for cellular respiration. This process involves the breaking down of glucose so that energy is released in a form that cells can then use. During cellular respiration, carbon dioxide is produced as a waste product. The carbon dioxide then needs to be removed from the cells or it would cause damage or death to them.
Select all that apply. Chromosomes _____.
1)are rod shaped structures that contain DNA
2)are located in the nucleus
3)occur in numbers that are the same for all members of a certain species
4)occur in numbers that are the same for all organisms
5)are organized into karyotypes for scientists to analyze
the answers are 1) 2) 3) and 5)
What do archaeologists believe was the function of signature seals?
A.
They were payment for sending clay tablets to distant villages.
B.
They indicated ownership of bags of grain or cotton.
C.
Tax officials used them as receipts for payment of taxes.
D.
They served as the centerpiece of ornamental clay platters.
The right option is; C. Tax officials used them as receipts for payment of taxes.
Archaeologists believed that tax officials used signature seals as receipts for payment of taxes.
Signature seals are stamps which creates an impression on a piece of paper such as letters, contracts, official paperwork, important documents or arts. Seals are composed of two elements which are; a die that has an inverted image of the seal, and another die which is usually an ink. Different seals are used for many purposes. Signature seals can be used as company seals, or to seal letters that contains private or confidential information.
The downward force acting on an object in free fall is the force of ____________________.
The priest in “First Confession” tells Jackie he should follow his sister Nora’s good example.
true
false ...?
Answer:
false
Explanation:
The hotter the star, the more light it gives off, the cooler the star the less light it gives off. Stars that follow this pattern are __________.
neutron stars
black holes
giants
main sequence stars
Answer:
Option D, main sequence stars
Explanation:
Main sequence star are those in which hydrogen fuses to form helium atom. The life of a sequence star depends on the mass it possess. A star which has high mass has higher internal material within them which burns fast to produce light and heat. The higher the mass, the higher is the luminosity (more light is produced).
Hence, the correct answer is option D main Sequence Star.
Are there any good mnemonic devices for remembering functional groups? ...?
How do the number of chromosomes in a female scorpion's egg cells compare with the number in her body (somatic) cells?
Question 12 options:
The number of chromosomes depends on the size of the scorpion.
There are half as many chromosomes in egg cells.
There are twice as many chromosomes in egg cells.
The number of chromosomes is the same in both.
The number of chromosomes in a female scorpion's egg cells is half as many chromosomes as compared with the number of chromosomes in her body (somatic cells). Thus, the correct option is B.
What are Chromosomes?Chromosomes are the units of DNA which contain the hereditary information of an organism. Chromosomes contain genes which are responsible for the development of different characters in an organism.
An organism is formed by fertilization of gametes in the sexual reproduction. The zygote formed is diploid in nature, so to maintain the chromosomal count constant in the zygote, the gametes need to be haploid in nature.
Two haploid gametes fuse to form a diploid zygote cell which leads to the formation of a diploid organism. In this organism, all the somatic cells are diploid in nature which undergo mitosis to divide the cells.
Therefore, the correct option is B.
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