Answer:
The cell membrane.
Explanation:
Which of the possible examples below would most likely lead to a change in the cell theory? A Scientists find life on Mars that is not made of cells. BScientists identify a cell organelle that practices the process of photosynthesis. C Scientists determine that an organism is living if it is made of twenty structurally-identical cells. D Scientists gather life from a volcano that is composed of cells which are very different from humans.
Answer: Probably B?
Explanation:
The possible examples below would most likely lead to a change in the cell theory: Scientists discover life on Mars that is not made of cells, i.e., option A, despite the fact that the cell theory states that all living organisms are made of cells.
What is the significance of the cell and its importance?Cell theory explains that life is made up of cells, but If scientists were to discover life on Mars that did not fit this definition, it would challenge the current understanding of the cell theory and the discovery of life on Mars that is not composed of cells would indicate that the cell theory is not universally applicable.
Hence, the possible examples below would most likely lead to a change in the cell theory: Scientists discover life on Mars that is not made of cells, i.e., option A, despite the fact that the cell theory states that all living organisms are made of cells.
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Which statement describes an advantage of sexual reproduction?
Answer:
The advantages of sexual reproduction: produces genetic variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage. a disease is less likely to affect all the individuals in a population.
Explanation:
What was the importance of the Supreme Court's decision in the case of Gibbons v. Ogden?
Answer:
Ogden (1824). In this Commerce Clause case, the Supreme Court affirmed Congress's power to regulate interstate commerce, and held that by virtue of the Supremacy Clause, state laws “must yield” to constitutional acts of Congress.
Explanation:
Where does the salt in salt water come from? Choose the two correct answers. A. dissolved salts from rocks B. rainwater flowing over land C. rainwater falling on oceans D. river water flowing into the ocean E. melting glaciers and polar ice caps
Answer:
C
Explanation:
when the rain falls its slightly acidic and that will erode the rocks on the ocean floor causing the water to be salty
Answer:
I feel like it would be A and C
What is the complementary sequence of the DNA strand modeled below?
3' AATCGC 5
Answer:
5' GCGATT
Explanation:
Complementary sequence: Nucleic acid sequence of bases that can form a double- stranded structure by matching base pairs. For example, the complementary sequence to C-A-T-G (where each letter stands for one of the bases in DNA) is G-T-A-C.
What is the main function of the nervous system?
A. regulating sleep
B. preventing accidental poisoning
C. Controlling the body's actions and reactions
Answer:Controlling the body's action's and reactions.
Explanation:When you get nervous, your body reacts to it.
Answer:
C. Controlling the body's actions and reactions
Explanation:
the nervous system is the center of all mental activity including thought, learning, and memory.
When referring to mitosis where do the Chromosomes from during metaphase
Answer:
During metaphase, the cell's chromosomes align themselves in the middle of the cell through a type of cellular "tug of war." The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.
What is CRISPR-Cas-9? a A medical device made of titanium that cuts genes. b A metal tool used for cloning animals. c A gene editing tool used to cut specific genes
Answer: C. A gene editing tool used to cut specific genes.
Explanation:
CRISPR is simply a family of the sequences in DNA thst are found in certain organisms like bacteria. They are used in the detection and also in destroying DNA.
The CRISPR-Cas9 enables geneticist to
remove or alter parts of the gene. It is a simple, and precise method for manipulating genes.
Answer:
C. A gene editing tool used to cut specific genes.
Explanation:
Hope this helps
The highest level of organization in an organism is
Answer: The biosphere
Explanation:
Answer:
Biosphere
Explanation:
because it encompasses all the other levels and also the biological levels of organisation of living things . Hope it is helpful and have a good luck
The concept of gene flow is demonstrated when a cow is driven off from its herd, joins another herd, and reproduces. When the cow contributes to the gene pool of the new herd, which of these most likely increases?
Complete question:
The concept of gene flow is demonstrated when a cow is driven off from its herd, joins another herd, and reproduces. When the cow contributes to the gene pool of the new herd, which of these most likely increases?
natural selectiongenetic variationenvironmental fitnessgene mutationsAnswer:
genetic variation
Explanation:
Whenever migration occurs between two populations, there is genetic flow going on. Genetic flow is an evolutive strength only if migration > 0 and if the allelic frequency in one generation is different from the allelic frequency in the next generation.
Genetic flow acts homogenizing the allelic frequencies between the two populations, and it might introduce variability into the new one.
For genetic flow to be possible, there needs not only the movement of the genes from one population to the other but also the reproduction process on the new population. Hence, it involves an interaction between the dispersion pattern and the reproductive system.
The bigger the difference in allelic frequencies between populations is, the bigger is the effect of the genetic flow.
at what ecological level does evolution occur
Scientists are observing a population of insects living in a warm, dry climate over time. Which piece of evidence would not indicate evolution in the population has occurred?
Choose the correct answer.
The phenotypes of the population remain the same.
The distribution of traits in a population has shifted.
The population is better adapted to survive in its environment.
The allele frequency of a particular form of a gene has increased.
Answer:
1st One
Explanation:
1st One
Answer:
A
Explanation:
It would be A because the rest are all evolution
An atom of a certain element has 16 protons, 16 electrons, and a mass of 32.
How many neutrons are in this atom? (type the number only)
Answer:
16
Explanation:
Number of neutrons=mass no.- no. of protons
32-16=16
In human beings, the statistical probability of getting either a male or female child is 50:50. Give a suitable explanation.
Answer:
There is 50 chance because there are two chromosomes that are same and two which are difeerent . XX MEANs girl XY means boys .
➜ The sex of an infant is determined by the type of sex chromosome contributed by the male gamete. Since the ratio of male gametes containing X chromosome and those containing Y chromosome is 50:50, the statistical probability of male or a female infant is also 50:50.
2. In a classroom experiment, you ground up some spinach in distilled water and filtered the liquid onto a piece of filter paper. The isolated organelles absorbed carbon dioxide and released oxygen. Which cellular organelle was most likely on the filter paper, and what process was it performing?
Answer:
Mitochondria; cellular respiration.
Explanation:
A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
Basically, mitochondria is one of the cell organelles found in all living organisms and it is known as the powerhouse. Therefore, mitochondria provides all the energy required in the cell by transforming energy forms through series of chemical reactions; breaking down of glucose into Adenosine Triphosphate (ATP) used for providing energy for cellular activities in the body of living organisms.
In a classroom experiment, you ground up some spinach in distilled water and filtered the liquid onto a piece of filter paper. The isolated organelles absorbed carbon dioxide and released oxygen. Thus, the cellular organelle which was most likely on the filter paper is mitochondria and the process it was performing is called cellular respiration.
Cellular respiration can be defined as a series of metabolic reactions that typically occur in cells so as to produce energy in the form of adenosine triphosphate (ATP). During cellular respiration, high energy intermediates are created that can then be oxidized to make adenosine triphosphate (ATP).
Basically, oxygen goes into the body of a living organism such as plants, humans and animals when they breathe while glucose is absorbed by the body when they eat.
when does land breeze blow and why?
What is one of the outcomes of the death of a star? *
Answer:After puffing off its outer layers, the star collapses to form a very dense white dwarf. One teaspoon of material from a white dwarf would weigh up to 100 tonnes. Over billions of years, the white dwarf cools and becomes invisible.
Explanation: googel hope it helps
Which gas is released due to photosynthesis?
A Carbon dioxide
B Oxygen
C Nitrogen
D Methance
Answer:
Oxygen
Explanation:
Plants take in Carbon dioxide and releases Oxygen
What is the Sun’s role in Photosynthesis and what type of energy conversion occurs
during the process?
Answer:
Explanation:
Sunlight is needed for photosynthesis because the solar energy is what is converted to chemical energy by the plant's chloroplasts. This energy is necessary for the production of glucose, which provides usable energy for the plant. the energy convertion turns solar energy into chemical energy
HELP!!!
A source of pollution that comes from one, identifiable place is what type of pollution?
1. Point source of pollution
2.Nonpoint source of pollution
Answer: Point sources of pollution
Explanation:
The U.S. Environmental Protection Agency (EPA) defines point source pollution as “any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack.” Factories and sewage treatment plants are two common types of point sources.
A town plans to clear a patch of forest to make a road wider. What possible changes should the town take into account?
Answer:
Remove vegetation and little damage to the forest.
Explanation:
The town has to remove all vegetation that is present along the road in order to make road wider but the people of town has to make sure that limited damage has to be done to the forest and organisms that lives in that forest ecosystem. Avoid unnecessarily cutting of trees and and add that side of forest to the road which has no or less number of trees so that trees can be saved from harm.
Pls help ASAP my teacher is mean
Answer:
A) the different humidity
Pleaeeee help me I love u so much if I do :) your the besttttttt
Which two structures are part of the cortisol pathway?
Each gland consists of two parts: an inner medulla, which produces epinephrine and norepinephrine (adrenaline and noradrenaline), and an outer cortex, which produces steroid hormones.
The structures that are part of the cortisol pathway are the hypothalamus and liver.
Cortisol is a glucocorticoid in the brain with the function of operation of Gluconeogenesis and stress. The pathway of cortisol in the body is termed as cortisol pathway.
What structures are in the Cortisol pathway?The cortisol pathway is started with the release from the brain, targeting the hypothalamus. The release of epinephrine and nor-epinephrine is controlled with the cortisol release.
The release of the hormones targets the pituitary and adrenal gland and controls the release of stress hormones.
The gluconeogenesis process is controlled by the cortisol hormone. The process takes place in the liver.
Thus, the structures that are part of the cortisol pathway are the hypothalamus and liver.
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Unlike the cell wall, the cell membrane _____.
is made of chromatin
is found in all cells
produces energy for the cell
is a rigid layer of cellulose
Answer:
Is found in all cells
Explanation:
The cell membrane is not made up of chromatin. Chromatin is found in DNA.The cell membrane obviously does not produce energy for the cell. It acts as a barrier that lets things in and keeps things out. Lastly, the cell membrane is not a rigid layer of cellulose. Cellulose is a component of a cell wall.To conclude, the cell membrane is found in all cells.
A student makes the following list of facts about a groups of objects in space while watching a NASA documentary:
- made of 200 billion stars
- 300 million light years from Earth
- 100 light years in diameter
Which of the following components of the universe is the student most likely describing?
(1 Point)
A galaxy
The universe
A constellation
The solar system
Answer:
the solar system of the universe is most likely.
1
1 point
A genetic mutation causes a snake to have brown skin. After many generations, most of the
snake population has the brown skin mutation.
e
Which of the following most likely caused this change?
Snakes with the brown skin mutation are able to survive and reproduce more
successfully than snakes without it.
The same mutation occurred in other snakes in response to environmental conditions.
All the snakes in the area were infected with the mutation.
The other snakes changed their colors to mimic the brown snake.
2
1 point
Lo
Answer:
I think the answer is B. "The same mutation occurred in other snakes in response to enviromental conditions.
Explanation
Answer:
Snakes with the brown skin mutation are able to survive and reproduce more
successfully than snakes without it.
Explanation:
i already aswered this question correctly .
Where do new alleles arise from?
Answer:
Gene mutations provide new alleles, making these mutations the ultimate source of variation. A gene mutation is an alteration in the DNA nucleotide sequence, producing an alternate sequence, termed an allele. Mutations occur at random, and can be beneficial, neutral, or harmful.
Explanation:
A widow's peak hairline (W) is dominant to straight hairline (w). Cross a heterozygous widow's
peak hairline person with a straight hairline person. What are the genotypic and phenotypic
ratios of their offspring
Answer:
Use a punnett square! I'll attach an example.
Genotype - Genetic constitution of dominant and recessive traits inherited from parents. BB, Bb, & bb can be used to represent these.
Phenotype - Observable. If a dominant trait is present, it shows as the phenotype. For example, brown hair is dominant to blonde hair. A person with a BB or Bb genotype will have brown hair, but a person with a bb genotype will have blonde hair.
Statistically, they have a 50% chance of a child with a widow's peak, and a 50% chance of a child with a straight hairline.
The genotypic and phenotypic ratios of their offspring are 50% and 50% ratio of the child.
What are the heterozygous ?
The heterozygous are the condition where you have inherited different forms of a particular gene from each of your biological parents. By different shapes we generally mean that there are different parts of the gene where the sequence is different.
Genotype - Genetic charter of dominant and recessive developments inherited from parents. BB, Bb, & bb may be used to symbolize these.Phenotype - Observable. If a dominant trait is present, it indicates because the phenotype. For example, brown hair is dominant to blonde hair. A individual with a BB or Bb genotype may have brown hair, however someone with a bb genotype may have blonde hair.Statistically, they've a 50% risk of a toddler with a widow's peak, and a 50% risk of a toddler with a instantly hairline.
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Why is there no "U" in this diagram?
help. this determines if I pass or fail.
Answer:
Explanation:
I BELIVE ITS C I REALLY APOLOGIZE IF ITS WRONG