How do multi-cellular organisms develop?
A.
Cell differentiation - start from a single cell and as the cells divide they become specialized
B.
They all start as skin cells
C.
Organisms have the same number of cells all the time.
Which organisms are made up of many different groups of specialized cells?
A. Multicellular
B. Prokaryotic
C. Unicellular
D. Bacterial
Answer:
multicellular
Explanation:
Suppose that a patient is diagnosed with a new disease caused by the buildup of waste material in the body’s cells. Which organelle is most likely malfunctioning in the patient’s cells?
the Golgi apparatus
lysosomes
ribosomes
the endoplasmic reticulum
Answer:
Lysosomes
Explanation:
Lysosomes are the membrane bound organelles that have hydrolytic enzymes. Lysosomes are formed from the enzymes rich vesicles that bud off from the Golgi apparatus. Function of lysosomes is to remove the wear and tear parts of cells and waste material from the cells. Malfunctioning of lysosomes may lead to buildup of waste material in cells.
Which of the following are lipids?
a. waxes
b. carbohydrates
c. amino acid
d. protein
Waxes are lipids
A wax is a simple lipid which is an ester of a long-chain alcohol and a fatty acid. The alcohol may contain from 12-32 carbon atoms. Waxes are found in nature as coatings on leaves and stems.
Wax is a lipid that is an ester of a long-chain fatty acid and alcohol. Alcohol may have between 12 and 32 carbon atoms. Wax is a substance that naturally coats stems and leaves.
Fats and oils make up the family of organic substances known as lipids. These molecules produce a lot of energy and are in charge of several bodily processes. The following list includes some crucial properties of lipids. Lipids are fatty or oily nonpolar molecules that are kept in the body's adipose tissue.
A diverse class of substances known as lipids is mostly made up of hydrocarbon chains. Lipids are organic compounds that are high in energy and supply that energy for several living activities. A family of chemicals known as lipids is distinguished by their solubility in nonpolar solvents and insolubility in water.
Therefore, wax is a lipid.
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If a mutation occurs in a body cell and the mutation changes the phenotype of the individual, what will happen to the offspring of the individual?
A. The offspring may or may not inherit the new phenotype.
B. The offspring will inherit the change in genotype but not the phenotype change.
C. The offspring will inherit neither the genotype or phenotype change.
D. The offspring will inherit the new phenotype.
The correct answer is (c) The offspring will inherit neither the genotype nor the phenotype change.
Mutation is a slight change in the genetic material of cell.The mutation that is carried from one generation to other is to be in the germ cell. The mutation that occurs in the body cell is not inherited to another generation. The mutation that occurs in a body cell might change the phenotype of the person but is not transferred to another generation. The conclusion is that the offspring will not have any change in the phenotype and genotype of the body.
What feature of the substrate allowed it to bond to the enzyme?
Both mitosis and meiosis are types of nuclear division but they result in different cell types describe how the steps of meiosis 1 differ from those of mitosis.
In meiosis I, sister kinetochores must attach to the same pole and homologous kinetochores must attach to the opposite poles. While In mitosis, sister kinetochores must attach to the opposite poles. This is the key division that reduces the ploidy of cells in meiosis.
What is Mitosis?Mitosis may be characterized as a type of cell division through which each parental cell is successfully divided into two genetically identical daughter cells. These daughter cells are diploid in nature. Somatic cells are generally divided through this process.
While in meiosis, each parental cell is successfully divided into four genetically unidentical daughter cells. These daughter cells are haploid in nature. Germ cells or gamete cells are generally divided through this process.
A key difference in both processes, however, is that during meiosis, each of these phases occurs twice. Each with half the number of chromosomes as a parent cell.
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Which of the following DNA sequences will result in the amino acid sequence –pro-phe-tyr-?
Answer:
The correct answer would be : GGGAAAATG DNA sequence.
Explanation:
Protein sequence is formation is occurred by the transcription and translation which include DNA to mRNA sequence which is complimentary in base nitrogenous bases to the DNA sequence.
mRNA sequence translate into amino acid sequence in triplet codes for every three nitrogenous mRNA sequence. Proline is coded by CCC/CCU/CCG/CCA among option that is complimentary to the GGG. For the phenylalanine which is code by UUU and UUA complimentary of AAA/AAT and tyr stop codon is coded by UAA/UAG which code by ATC/ATT.
Thus, the correct answer is : GGGAAAATG DNA sequence.
another name for cell division is the
Which of these organisms have an endoskeleton,beetle,elephant,tree,or a crab?
What might happen to a person whose nervous sand endocrine systems fail to maintain homeostasis?
Answer:
Disrupt the internal stability and may cause death in severe cases
Explanation:
The endocrine system is very essential to maintain homeostasis in our body. It is so because at cellular level all the activities are initiated, controlled and regulated by the hormones released by the endocrine system. Any imbalance in the hormone release or failure of endocrine system can dismantle the internal stability and functioning of body organ and may even cause deaths in extreme cases.
Three requirements of an efficient respiratory system
The olfactory system is the sensory system that deals with the sense of smell. please select the best answer from the choices provided t f
The right answer is true.
At the anatomical level, the olfactory system is composed of two structures, the main olfactory system whose stimulation induces sensations of smell and the trigeminal system that induces somatosensory sensations (tactile, thermal, pain, humidity). There is a third part called "vomeronasal organ", which is set back in the opening of the nostrils. In humans, the vomeronasal organ remains in a rudimentary state because its afferents nerve disappears from the 18th week of the embryonic life.
5. _______ are RNA and protein complexes that are found in all cells. These complexes help cells during protein translation by joining amino acids together to form polypeptides. Vacuoles Ribosomes Lysosomes Chloroplasts
The answer to that question is Ribosomes
Answer:
option). ribosomes.
Explanation:
Ribosomes are cell organelles, made up of ribosomal RNA and proteins. They are present in both prokaryotic and eukaryotic cells and provide platform for the process of protein synthesis or translation.
During translation, mRNA carries information from nucleus to ribosomes and ribosomes help in formation of peptide bonds that join two amino acids and form polypeptides.
Thus, the correct answer is option). ribosomes.
Compare and contrast what happens in mitosis and meiosis and discuss the importance of each process to a living organism.
Answer:
Mitosis is important for growth and repair, while meiosis occurs in cells involved in sexual reproduction.
Explanation:
Everything in the physical universe, left to itself, moves to a _________ state of entropy or disorder???????
glycolysis provides a cell with a net gain of
A cell receives a net gain of two molecules of ATP during glycolysis, the first step of cellular respiration. ATP, the main form of energy used by cells, is important for many cellular functions.
In the process of glycolysis, one glucose molecule is split into two pyruvate molecules, which are then phosphorylated at the substrate level to produce four molecules of ATP. However, the initial step of glycolysis uses two ATP molecules, so there is a net gain of two ATP molecules. Two molecules of NADH (nicotinamide adenine dinucleotide), which can be employed in the electron transport chain to produce additional ATP during aerobic respiration, are also produced by glycolysis in addition to ATP.
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Animals are consumers and they eat other organisms or even produce their own food, like plants.
Is this try or false
Recall the basic components of ATP
ATP consists of an adenine base, a ribose sugar, and three phosphate groups. The breaking of high-energy bonds in ATP releases energy for cellular activities. The recharging of ADP to ATP requires significant energy.
Adenosine triphosphate (ATP) is a complex molecule that plays a critical role in storing and transferring energy within cells. The structure of ATP is composed of three main parts: an adenine nucleoside 'base', a five-carbon sugar (ribose), and triphosphate. The triphosphate tail of ATP is made up of three phosphate groups that are designated by the Greek letters alpha (), beta (), and gamma (). The alpha phosphate is the one closest to the ribose sugar. ATP is converted into adenosine diphosphate (ADP) or adenosine monophosphate (AMP) as it releases energy for cellular processes through the breaking of the high-energy bonds between phosphate groups.
ATP is an inherently unstable molecule due to the negative charges of the phosphate groups repelling each other. This instability makes it easier for the bonds between the phosphates to be broken, which is a process called hydrolysis. The hydrolysis of ATP releases a large amount of energy that cells use to perform most cellular activities, such as muscle contraction, active transport, and biochemical synthesis.
The addition of a phosphate group to recharge ADP back to ATP requires a high amount of energy, which is often derived from the breakdown of glucose during processes like glycolysis. ATP's role as the primary energy currency of cells cannot be overstated; it is essential for life and enables the functioning of most cellular processes.
Choose each of the following that would be an example of a pollution situation that would contribute to non-point source pollution.
A. improper use of fertilizers on lawns
B. factory waste water discharge into a river
C. disposal of chemicals on roadways
D. smoke stack emissions from a power plant
E. leaky oil pans on automobiles ...?
Answer:
The correct answer are the options: A,C and E
Explanation:
Hello!
Let's solve this!
Pollution from non-point sources will be increased through the options:
A. improper use of fertilizers on lawns, C. disposal of chemicals on roadways, and E. leaky oil pans on automobiles.
These are the three correct options.
What is the role of natural selection in evolution?
Natural selection is a specific mechanism of evolution in which the heritable traits (characteristics) help an organism to survive his generation.
Natural selection is a specific mechanism of evolution in which the heritable traits (characteristics) help an organism to survive and reproduce successfully.
Natural selection is a specific mechanism of evolution in which all acquired traits (characteristics) help an organism to survive and reproduce successfully
Answer:
Natural selection is a specific mechanism of evolution in which the heritable traits help an organism to survive and reproduce successfully. For example, white and brown moths of the same species. Both hide on tree bark, which is brown. Since the white moths are easier to spot for predators, they die off, which makes the brown moths more successful in surviving long enough to reproduce and pass on the brown color gene.
If there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. Explain your answer.
Answer:
Sudden changes in the temperatures and sudden drop in pressure conditions led to how we see the present present atmosphere and suggest the evolution of cyanobacteria.
Explanation:
During the earth's primitive stages, the planet was devoid of oxygen and had an unstable atmosphere mostly composed of natural or greenhouse gases. These gases tended to be blown out from the center due to the weak gravitational pull of the earth and blown away from the sun's solar storms. When the atmosphere cooled and temperatures dropped to the point where the dust started to from and after which the multi-celled life emerged from the oceans in form of blue-green algae as cyanobacteria that did not need oxygen and used carbon and present gases to build up oxygen. Which further set the ground for the evolution of other autotrophs and planets of vascular nature.
Which role does the cane toad play in the Hawaiian Islands?
native species
invasive species
uncontrolled species
endangered species
Answer:
invasive species
_____ is the main energy source for all life on earth. Chlorophyll Water Sunlight Nitrogen
Answer: Sunlight
Sunlight is the main source of energy for all life forms on earth. It is trapped by the green plants and other autotrophic organisms in order to conduct the process of photosynthesis. In photosynthesis, the light energy from sun is converted into chemical energy in the form of food. The plants are eaten by other organisms such as animals, birds and humans as a source of food and energy.
Which gland secretes melatonin?
Final answer:
The pineal gland secretes melatonin, which helps regulate the sleep-wake cycle.
Explanation:
The pineal gland secretes melatonin. The pineal gland is a small endocrine gland located in the brain, specifically in the diencephalon region. Melatonin is a hormone that helps regulate the sleep-wake cycle.
The pineal gland, nestled within the intricate landscape of the brain's diencephalon region, serves as a vital player in the orchestration of our circadian rhythms. This small endocrine gland's primary function is the secretion of melatonin, a hormone with profound implications for our sleep-wake cycle regulation. As daylight wanes, the pineal gland responds to the diminishing light by increasing melatonin production, signaling the onset of darkness and encouraging the body to transition into a state of rest. This hormone, often referred to as the "hormone of darkness," plays a pivotal role in synchronizing our internal biological clock with the natural day-night cycle, highlighting the intricate connection between hormonal secretion and our innate patterns of sleep and wakefulness. Understanding the pineal gland's role in melatonin production contributes to insights into circadian rhythm disorders and opens avenues for exploring therapeutic interventions in sleep-related health issues.
can you accurately determine an genotype by observing its phenotype?
A person that is a carrier has what combination of alleles?
If purple flower color is dominant and red flower color recessive, how many phenotypes are possible in offspring of homozygous purple crossed with homozygous red?
Which of the following statements about wildfires in deciduous forests is not true?
a. Deciduous forests are unaffected by wildfires.
b. Lichen and moss growth increases in deciduous forests as a result of wildfires.
c. Nutritional quality of new growth increases temporarily after a wildfire.
d. The quantity of trees in deciduous forests is unaffected when it occurs less than once every five years.
The statement which is not true about wildfires in deciduous forests is that Deciduous forests are unaffected by wildfires. Thus, the correct option for this question is A.
What is meant by Wildfires?Wildfires may be defined as uncontrolled fire that significantly burns in wildland vegetation, often in rural areas. Wildfires can start from natural causes, such as lightning, but they are usually caused by humans, such as campers or hikers who did not put out their campfires properly.
The consequences of wildfires are determined by the fact that it completely eliminates or degrades all sorts of biodiversity that is present in the original position. In more simple words, wildfires are harmful to storing biodiversity in any region.
The density of vegetation and other biodiversity is compactly found in deciduous forests. So, the activity of wildfires may greatly impact the forests of deciduous.
Therefore, the correct option for this question is A.
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What is a substance in plant sources that cannot be digested that is 5 letters