Which of the following does a prokaryotic cell lack?
A. nucleus
B. cell wall
C. ribosomes
D. DNA
2. Which of the following wrap around axons to form a myelin sheath?
A. Astrocytes
B. Ependymal cells
C. Satellite cells
D. Schwann cells
Answer:
D. Schwann cells
Explanation:
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Which of the following would NOT be an example of Genetic
Engineering?
A.Gene Therapy
B.Natural Selection
C.Genetically Modified Organisms
D.Cloning
Answer:
B. Natural Selection, others are some what related to genetic engineering.
People who have muscular dystrophy have something called a "mutation". How does that mutation arise
Answer:
The correct answer is - It can occur when the DNA is copied over there can be a problem that is not caught during cell division causing that makes the new DNA mutated form of the original version and the mutation can be ok or harmful.
Explanation:
DMD or muscular dystrophy is a recessive x liked genetic disorder that takes place due to mutation or the error in the genes during cell division and desired protein does not form called dystrophin.
It takes place due to an error in DNA replication and is not corrected or identified by the checkpoints of the cell division and expressed from the mutated form of dystrophin which is shorter than the original form.
Long chains of amino acids are
sugars.
proteins.
lipids.
carbohydrates.
Answer:
Amino acids form proteins
Consider a population of 100 annual wildflowers, some yellow, some red. It is like other real populations, its gene pool is changing. For each of the scenarios below state which of the Hardy-Weinberg conditions the population deviates from, and explain what agent of microevolution causes the gene pool to change
Answer:
From normal to hybrid or different state.
Explanation:
According to Hardy-Weinberg conditions, the population deviates from present state to hybrid because of the change of gene pool. Genetic drift, natural selection and mutation are considered as agent of microevolution that is responsible for the change in gene pool. If the change in gene pool occurs the form and structure of population of organisms has to be change in its appearance.
what was worked D.R Aklilu Lema ? and what is his reasarch?
Answer:
In 1964 a young Ethiopian doctor, Aklilu Lemma, discovered that suds from the fruit of a common African plant, the endod or soapberry, which African women have used as soap for centuries, act as a potent molluscicide. ... And Lemma's early research confirmed this potential.
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Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Fill in the terms that complete the statements.
In this lab, you dissected a flower. The modified leaves that surround the reproductive parts are called ____. These structures help attract pollinators to the flower. The ___ is the female reproductive organ, which contains three segments: the stigma, style, and ovary.
Answer:
In this lab, you dissected a flower. The modified leaves that surround the reproductive parts are called petals. These structures help attract pollinators to the flower. The pistil is the female reproductive organ, which contains three segments: the stigma, style, and ovary.
In this lab, you dissected a flower. The modified leaves that surround the reproductive parts are called petals. These structures help attract pollinators to the flower. The pistil is the female reproductive organ, which contains three segments: the stigma, style, and ovary.
What is Female reproductive organ?One ovary is located on either side of the uterus in the majority of females. They have two primary functions: generating hormones and releasing eggs. They are roughly the size and shape of an almond.
At birth, two ovaries each hold about 700,000 immature eggs, or oocytes (Trusted Source). These eggs start to grow and mature inside the ovary follicles after a person reaches puberty.
A developed egg is released by the ovaries around once every month. The menstrual cycle includes a process called ovulation, which is what gives rise to eggs.
Therefore, In this lab, you dissected a flower. The modified leaves that surround the reproductive parts are called petals. These structures help attract pollinators to the flower. The pistil is the female reproductive organ, which contains three segments: the stigma, style, and ovary.
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Which of the following statements about how surface currents affect climate is false?
Because surface currents are always warm, they warm the land they travel closest to.
A periodic change in the location of warm and cool surface waters in the Pacific Ocean changes global weather patterns.
A current that travels along the West Coast keeps temperatures along the coastline cooler than temperatures inland all year long.
England experiences warmer temperatures than other countries at the same latitude because of the warming effect of a surface current.
What human factor has an impact on the flooding of the Yangtze River
Answer:
Deforestation directly increases erosion and siltation rates. There is an increased risk of flooding in Yangtze River basin in China and the major river basins in East Asia and the Amazonian basin .
Explanation:
why is the coral reef more important than the ocean ?
Answer:
Coral reefs provide an important ecosystem for life underwater, protect coastal areas by reducing the power of waves hitting the coast, and provide a crucial source of income for millions of people. Coral reefs teem with diverse life. Thousands of spec
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ACTUAL ANSWERS and braincells are required
5 How does the presence of coal on Antarctica indicate a climate change?
The discovery of a new coal deposit means people will be able to use this found fuel longer.
Coal forms from the remains of plants that lived in tropical swamps millions of years ago, Coal deposits can tell scientists what the composition of the atmosphere was in the past.
Coal is burned for fuel and it releases carbon dioxide into the atmosphere.
Answer:
The discovery of a new coal deposit means people will be able to use this fossil fuel longer.
Coal is burned for a fuel and releases carbon dioxide into the atmosphere.
A scientist identifies a sequence at random from the human genome. Which description of the sequence is the most likely?
A. The sequence is located on a sex chromosome.
B. The sequence is part of a gene for cell growth and development.
C. The sequence is part of a gene for immunity and defense.
D. The function of the sequence is unknown or unidentified.
Answer:
The answer is D. The function of the sequence is unknown or unidentified.
Explanation:
This answer is correct hope this helps! :)
In your explanation, include:
Identify organs of the urinary system.
Relate the organs with their
functions.
• The material this system uses to
maintain balance in the body.
Answer:
The kidney is an organ that is part of the urinary system.
Explanation:
The kidney's function is to filter out waste from your blood. It requires water and your blood to maintain balance in your body. The waste from your blood and the water will go out as urine.
Challenge: In the process of photosynthesis, plants use carbon dioxide (CO2), water (H2O), and light energy to produce a sugar (C6H12O6) and oxygen (O2). In the process of respiration, animals and plants release energy from sugar and oxygen and produce carbon dioxide and water. The chemical equations that describe these reactions look like this:
6CO2 + 6H2O + light C6H12O6 + 6O2 C6H12O6 + 6O2 6CO2 + 6H2O + energy
How do these equations explain why the total amount of O2 and CO2 remains the same?
Answer:
this is because the reactant substances gives equal products in the product side
can someone check if my dihybrid cross is correct?
Answer:
Yeah I believe it is
Explanation:
Answer:
Yes this is correct
Explanation:
Since the recessive genes are cancelled out by the dominant ones, the only possible traits are the dominant ones, so yes you did it correctly :)
Question 2
Four metal cubes, each at a different starting temperature, are placed in contact with each of
Cube #1
Cube #2
25°C
90°C
Cube #3
Cube #4
10°C
56°C
Which of the following describes the most likely flow of thermal energy in this situation?
It appears that some of the answer choices got cut off in the image. In any case, thermal energy would flow from a higher-temperature cube to a lower-temperature cube.
So the correct answer should be among the following formulations:
Cube #1 to Cube #3
Cube #2 to Cube #1
Cube #2 to Cube #4
Cube #4 to Cube #3.
Heat, defined as a sort of energy transfer as well as the distinctive energy of a degree of freedom. Therefore, Cube #1 to Cube #3 and Cube #2 to Cube #4 are correct.
What is thermal energy?The word "thermal energy" is being used interchangeably in engineering and physics. It can relate to a variety of distinct physical notions.
Internal energy as well as enthalpy of a body of radiation and matter are examples of these; heat, defined as a sort of energy transfer (as does thermodynamic work); as well as the distinctive energy of a degree of freedom are examples of these. Cube #1 to Cube #3 and Cube #2 to Cube #4 describes the most likely flow of thermal energy in this situation.
Therefore, Cube #1 to Cube #3 and Cube #2 to Cube #4 are correct.
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Cellular respiration is the process by which organisms:
A) Release energy from sugar for metabolic use
B) Create complex organic molecules from simple ones
C) Convert heat to chemical energy for metabolic work
D) Do more than one of the above
Which statement about water on Earth is true?
There is more water underground than in the oceans.
More freshwater is in the atmosphere than on the surface.
More freshwater is located underground than on the surface.
There is more water in rivers and streams than in the oceans.
More freshwater is located underground than on the surface.
Answer:
More freshwater is located underground than on the surface.
The statement about water on Earth is true that more freshwater is located underground than on the surface. Thus, option C is correct.
What is hydrosphere?The hydrosphere has Water in any location on Earth, which has been including the atmosphere, surface, and underground and hydrosphere can be regarded as one of the main sphere of the earth.
Hydrosphere can be regarded as the total amount of water that exist on the surface of the planet, these can include water in any location on Earth, as well as the atmosphere and surface, and the underground even in the air.
There is more water underground than in the oceans and more freshwater is in the atmosphere than on the surface as well as more freshwater is located underground than on the surface.
Therefore, The statement about water on Earth is true that more freshwater is located underground than on the surface. Thus, option C is correct.
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Which cell structure of the zooxanthellae performs a vital function that also helps the coral polyp grow?
Answer:
photosynthesis
Explanation:
Zooxanthellae are not only responsible for providing energy via photosynthesis, but also take up nutrients released by the corals metabolism such as nitrogen and carbon dioxide.
A F1 pea plant carries Yy alleles for seed color. Explain
what would happen to these alleles during gamete
formation
Answer:
During the formation of the gametes (i.e. meiosis) we have the separation of the sister chromatids and the independent segregation of the alleles: this means that one of the gametes will carry the "allele Y" and the other the 'y allele"
The ""Y"" shaped region where new nucleotides are being added during replication is known as a(n):
Answer:
The Y shaped region is a replication fork.
what will happen if the number of organisms decreased?
Answer:
it will affect the ecosystem in a bad way
Answer:
They would starve and die unless they could move to another habitat. All the other animals in the food web would die too, because their food supplies would have gone. The populations of the consumers would fall as the population of the producer fell.
Explanation:
A scientist discovers that a strand of DNA is 20% Guanine and 30% Adenine. What percent of
Cytosine and Thymine will it contain?
Answer:
20% cytosine
30% thymine
Explanation:
Cytosine is paired with guanine so they must have the same percentage. Adenine is paired with thymine so they also must have the same percentage.
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What is one way that people can harm the environment?
A) By planting new trees and plants.
B) By putting garbage in lakes
C) By recycling and reusing objects.
D) By driving their car less and biking more.
Answer:
B) By putting garbage in lakes
Explanation:
if you put garbage in lakes, it causes pollution thus causing harm to environment
Iron is with one kind of atom that combines with oxygen from the air to form rust (iron oxide). Rust contains two types of atoms, which means it is .
Answer:
A compound
Explanation:
A compound is a substance (pure) that contains two or more different types of atoms chemically combined together. In other words, a compound is formed from the chemical combination of two or more elements.
According to this question, iron (Fe) is an element with one type of atom that combined with oxygen in the atmosphere to form iron oxide known as RUST. This is primarily what happens when a ironic substance is said to RUST. Rust is a combination (chemical) of two different kind of atoms i.e. iron and oxygen, hence, it is a COMPOUND.
Answer:
Explanation:
first one is compount
Soil is best described as _______.
Answer:
Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture.
Explanation:
1. Which statement is NOT true about chemical and physical changes?
A. Chemical and physical changes could produce precipitates.
B. Chemical changes produce new substances, but physical changes do not.
C. Physical changes use energy transferred as heat, but chemical changes do not.
D. Physical and chemical changes could require days for their effects to be noticeable.
Answer: A. Chemical and physical changes could produce precipitates.
Explanation:
Polygenic inheritance is determined by multiple _______ located at different loci on different chromosomes.
Answer:
Polygenic inheritance is determined by multiple Genes located at different loci on different chromosomes.
Polygenic inheritance happens when an individual posses quantitative traits that become a variation compared to the parent's traits.
This phenomenon happens due to the combination of two or more genes that resulted in the characteristics that considered as the combination of both parents' characteristic.
Explanation:
Answer:
Genes.
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