Answer:
A. Each of the cells in the organism will have its own nucleus.
Explanation:
While snorkeling in the ocean you find large, leafy organisms that are brownish in color growing in large masses. To be sure that they are protists since they look quite plant-like, the characteristic that the organism's cells exhibit will be that each of the cells in the organism will have its own nucleus.
This is because protists are eukaryotes, which simply means it has its own nucleus and are usually single celled.
Question 4 Multiple Choice Worth 2 points)
In the diagram below, what is the property of the wave indicated by the letter A?
- amplitude
- crest
-frequency
-trough
Answer:
- trough.
Explanation:
The Trough is the lowest wave section, the minimum wave part. It's the other way around from crest.A wave or alternating signal minimal point.A long, narrow depression, waves or ridges between them.A low point in a corporate cycle or on a graph.An extended area of relatively low pressure, often in conjunction with the front.why are electrons in an atom involved in bonding
Answer:
The valence electrons have a role in the bonding of two atoms. The nuclei of each atom are drawn together by their attraction to the valence electrons of the other atom. As the atoms are drawn together by their attractions, electrons from each atom are drawn to the nuclei of both atoms, where they are "shared."
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Which other group of organisms can supply energy to a food chain in a similar way to plants?
Most streams result from _____.
a. altitude
b. melted snow
c. oceans
d. rivers
Answer:
....b........ melted snow
Question 9
What is the main difference between a prokaryote and eukaryote cell?
Answers:
The presence of a cell wall
The presence of genomic DNA
The absence of genomic DNA
Crossing over
The absence of a cell wall
Question 10
Please choose 1
the presence of genomic DNA
Please help !
Which describes electrons?
Electrons move at very fast speeds around the nucleus of an atom.
Electrons are stationary outside of the nucleus of an atom.
Electrons move at very fast speeds inside the nucleus of an atom.
Electrons are stationary inside the nucleus of an atom.
What is the common difference for this arithmetic sequence?
54, 50, 46, 42, 38, ...
A. 4
B. 54
C. 34
O D. -4
Answer:
D) -4
This is because each term is four less than the previous term.
Explanation:
Answer:
D
Explanation:
because it is going down -4 every time
Albinism, lack of pigmentation in humans, results from an autosomal recessive gene. Two parents with normal pigmentation have an albino child. What is the probability that their next three children will be wild type
Answer:
50
Explanation:
because this disorder occurs when the alleles are recessive meaning the alleles Will be heterozygous
Which of the following events contributes to the termination of a signal generated by the binding of a ligand to a receptor tyrosine kinase? Only one answer is correct
1. Phosphatases hydrolyze key phosphorylated residues.
2. Kinases hydrolyze key phosphorylated residues.
3. Kinases phosphorylate key residues.
4. The receptor tyrosine kinase dimerizes.
5. GTPase removes a phosphoryl group from GTP.
6. Phosphatases phosphorylate key residues.
Answer:
1. Phosphatases hydrolyze key phosphorylated residues.
Explanation:
Receptor Tyrosine Kinases (RTKs) are high-affinity transmembrane protein receptors that bind to a wide variety of ligands (e.g., growth factors, cytokines, hormones). These receptors (RTKs) have a transmembrane domain and therefore these proteins act as membrane receptors, as well as exhibit catalytic activity. The intracellular C terminal region of RTKs contains catalytic domains responsible for both autophosphorylation and tyrosine phosphorylation of their protein substrates. Moreover, Protein Tyrosine Phosphatase (PTPs) are critical enzymes that remove phosphate groups from tyrosine residues in different substrates (including RTKs), thereby regulating key signaling pathways such as cell proliferation, cell differentiation, and cell-cell adhesion.
Option :
Bacteriacial cell
Plant cell
Animal cell
All of these are correct answer
Answer:
yes
Explanation:
bcoz it helps in every way
This one too, please?
(3rd time)
I need explanation for your answers, even though it's multiple choices, I still need your explanation for it.
DUE TOMORROW!
If your answer is NONSENSE it will be deleted as soon as possible!
But if your answer is CORRECT, HELPFUL, HAS AN EXPLANATION, I'll chose your answer as the BRAINLIEST ANSWER!
Answer:
1, group 1
2 group 7
3 group 2
4 D
5 B
6 A
Answer:
7. A 1
8. C 17
9. B 2
10. (d) C and D
11. (b) reactivity
12. (a) corrosion
13. (c) activity series
Explanation:
7. , 8, and 9,
Group 1 elements are named as alkali metals
Group 2 elements are known as alkaline earth metals
group 17 metals are known as halogens
10.
Na and Xe have one valency whereas the other two elements have variable valency which is a property of transition metals so the answer is (d) C and D
11.
It;s the definition of reactivity
12.
Definition of corrosion
13.
definition of activity series
urine is made of nutrients and water
Answer:
what's the question over here?!
The suprachiasmatic nuclei enable the nervous system to respond to daily light/dark alterations through their stimulation of
Answer:
The suprachiasmatic nuclei enable the nervous system to respond to daily light/dark alterations through their stimulation of melatonin.
Explanation:
Melatonin is a hormone produced naturally by the body. Its function is to regulate the body's circadian cycle. This hormone is stimulated and begins to act by changing between a light environment and a dark environment. This stimulation interacts with the suprachiasmatic nuclei making the nervous system understand this change and luminosity of the environment and respond to the action of melatonin.
how do humans impact the biodiversity of ecosystems
Answer:
Humans affect biodiversity by their population numbers, use of land, and their lifestyles, causing damage to habitats for species. Through proper education, and by demanding that governments make decisions to preserve biodiversity, the human population will be able to sustain life on earth longer.
Explanation:
Human population levels, land usage, and lifestyles all have an impact on biodiversity, causing damage to species' habitats. The human population will be able to maintain life on Earth for longer if adequate knowledge is provided and governments are forced to make decisions that protect biodiversity.
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[tex]\texttt{HOPE IT HELPS}[/tex]
[tex]\texttt{HAVE A GREAT DAY!!}[/tex]
A degraded ecosystem is replaced with a different but productive ecosystem type, one that might even include some nonnative species. For example, a degraded forest might be replaced with a productive pasture.a. passive restoration b. remediation c. partial restoration d. rehabilitation e. complete restoration
Answer:
d. rehabilitation
Explanation:
Technology-associated rehabilitation is an ecological practice that allows a degraded area to be restored, rehabilitating all its degraded habitats. However, this restoration is not done naturally, but is caused by human intervention, which can cultivate the entire plant population in the area, even adding non-native species, which are selected to leave the productive area, but ecologically harmonious.
3. A bacterial isolate from a urine specimen was grown in culture, Gram stained, and then tested for its ability to ferment sugars and hydrolyze various subtrates. What approach to bacterial identification is this an example of
Answer:
Phenotypic approach for bacterial identification
Explanation:
Bacterial identification can be done by conventional methods, which are based on phenotypical characteristics. These methods are much affordable and reasonable.
Phenotypical identification is based on bacteria´s observable characteristics, such as their morphology, development, and biochemical/metabolic properties.
It is important to consider that these methods do not provide absolute certainty. They can only indicate the genera or species to which the bacteria under study may belong.
Some primary evidence is usually used for fast bacteria identification:
Gram staining, morphology, growth at different media or different incubation atmospheres, glucose fermentation, spores production, motion, aerobiosis/anaerobiosis, among others.Knowing that the bacteria in the exposed example was isolated and grown in culture, then Gram-stained and tested for biochemical reaction, we can assume that the approach for its identification is phenotypic.
How are meiosis and mitosis similar?
A.They both produce diploids.
B.They happen at the same time.
C.They both produce sex cells.
D.They both produce new cells.
Answer:
D.They both produce new cells.
Explanation:
Meiosis and mitosis are both processes of cell division; however, they have many differences. Meiosis occurs in sex cells and produces haploids that can be fertilized. Mitosis occurs in body cells and produces diploids that replace old or damaged cells. Still, both processes result in the creation of new cells.
Answer:
D) They both produce new cells!
Explanation:
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Drag each of the following labels into the appropriate box to identify which motor division of the peripheral nervous system is identified by the given function.an be excitatory or inhibitory on the target organ Principally involved with movement of materials through the body Skeletal muscle activation Intestinal smooth muscle activation Voluntary Sweat gland activation Lacrimal gland activation Principally involved with movement "of" the body principally invvedPiloerector muscle Involuntary activation Somatic Autonomic
Answer:
Somatic: Skeletal muscle activation VoluntaryPrincipally involved with movement "of" the body.Autonomic: Can be excitatory or inhibitory on the target organ. Principally involved with the movement of materials through the body. Intestinal smooth muscle activation. Sweat gland activation Lacrimal gland activation Piloerector muscle Involuntary activation.Explanation:
We can divide the nervous system into the central nervous system, which consists of the brain and spinal cord, and the peripheral nervous system, which consists of all the nerves that are throughout the body carrying information from and to the central nervous system.
We divide the peripheral nervous system into the somatic nervous system and the autonomic nervous system.
The somatic nervous system is the conscious one, that is to say, that we know and control what it does. It is voluntary. It has motor and sensory neurons that carry information to and from the central nervous system. The somatic nervous system is the one that makes us move our muscles to do an action.
The autonomic nervous system is involuntary. In other words, we can not control it consciously. It is the one that controls glands, organs, and smooth muscle, like the one that surrounds the digestive tract to move the food. As we can not consciously control it, this system can work exiting or inhibiting an organ depending on the situation.
The peripheral nervous system is simply divided into 2 types, which are the somatic nervous system and the autonomic nervous system.
SOMATIC
Voluntary principally involved with movement "of" body skeletal muscles activation
AUTONOMIC
Involuntary lacrimal gland activation intestinal smooth muscle activation principally involved with movement "through" body sweat gland activation arrector pili activation can be excitatory or inhibitory on target organThe peripheral nervous system (PNS) is the simply known as the division of the nervous system that has all the nerves that is found outside of the central nervous system (CNS).
Its primary role is to connect the central nervous system to various organs such as the limbs, and skin. simply divided into 2 types, which are the somatic nervous system and the autonomic nervous system.
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choose the letter of the correct answer 1. Which one of the following is NOT an organic compound? a. Methane b. Carbon dioxide d. Lactic acid C. Oil
Answer:
B
Explanation:
How does wet heat sterilization, such as an autoclave, work to inactivate bacteria and other infectious pathogens?
Answer and Explanation:
The microorganisms such as bacteria and fungi are basically composed of biological macromolecules (lipids, proteins, polysaccharides). As the temperature increases, the structure of proteins is disrupted and they lose their function. For example, enzymes that catalyze biological reactions are inactivated.
Therefore, wet heat sterilization is a process in which the material is heated during a certain time at a certain high temperature to destroy the microorganisms by producing the denaturation of structural proteins and enzymes.
How will you isolate DNA from a pure fungal culture
Answer:
Explanation:
There are several ways of isolating DNA from a pure fungal culture but you can use the CTAB method.
In this method, genomic DNA can be extracted.
First of all, the cell walls of fungal mycelia can first be broken down by grinding it using glass rods or you can use or liquid nitrogen. Place it in a plate. You can now CTAB extraction buffer , then incubate at 65°C, then let it undergo purification with phenol:chloroform:isoamyl alcohol 25: 24: 1 and carry out precipitation with isopropanol . Then the DNA can be extracted and then dissolved in 50 μl of pure water.
The brain generally stores new information in its own different and unique netowrk but retrieves information by chunking it with information in netowkrs that contain similar characteristics or associations.
a. True
b. False
The _______ is the part of the neuron that carries information away from the cell body.
A cell membrane has permeability, which means that the membrane?
Normally, this region is imprinted in the sperm, but not the egg. This means that the DNA on the ____________ copy of the chromosome will be methylated at the imprinting center, while the DNA on the ____________copy of the chromosome will not be methylated in this region.
Answer: The DNA on the paternal copy of the chromosome will be methylated at the imprinting center, while the DNA on the maternal copy of the chromosome will not be methylated in this region.
Explanation:
Chromosomes are DNA structures associated with proteins such as histones. They are found in the nucleus of cells and contain genetic information for the development and functioning of an organism. Human beings are diploid, meaning that they possess two copies of each of the 23 chromosomes (a total of 46).
Gametes, which are sex cells such as the sperm (produced by the male) and the egg (produced by the female) that are haploid. This means that they possess only one chromosome of each pair. During fertilization, a male gamete fuses with a female gamete to generate a zygote, which will give rise to a new human being. This new individual will possess half of the genetic material from its father and half from its mother. Thus having a total of 46 chromosomes, 23 from each parent.
Genetic imprinting modulates gene expression by chemical modification of DNA and/or modification of chromatin structure. Often, genetic imprinting causes a gene to be expressed only on the chromosome inherited from one of the parents. One example of imprinting is DNA methylation, which is a process by which methyl groups are added to DNA. Methylation modifies DNA function when found in the promoter gene, repressing gene transcription. This means that a methylated gene will not be expressed, that is, it will not produce a protein encoded by that gene. So, if a region of DNA is imprinted in the sperm cell, the paternal chromosome inherited from this sperm will be methylated in the genes of the offspring. And the offspring will only express the maternal copy inherited, which will not be methylated.
If the entire mRNA sequence for a polypeptide was AUGUACUCGCGACCGUAA, how many amino acids does the polypeptide have
Answer:
5 amino acids
Explanation:
The process of translation involves synthesizing a sequence of amino acids from a mRNA template. The mRNA molecule is read in a group of three nucleotides called CODONS. A codon specifies or codes for an amino acid.
In the question, a mRNA sequence was given as follows: AUGUACUCGCGACCGUAA. From this sequence comprising of 6 codons, 5 possible amino acids will be contained in the polypeptide encoded by this mRNA molecule as the last codon (UAA) is a STOP codon. The following are the codons in the mRNA sequence and their respective amino acids:
*AUG- methionine (met)
*UAC - tyrosine (Tyr)
*UCG - Serine (Ser)
*CGA - Arginine (Arg)
*CCG - Proline (Pro)
*UAA - Stop
why is climate change a serious threat to the least developed countries practicing agriculture as their main occupation mountain region island and low lying countries
Answer:
Increase in sea level on the low lying countries which leads to degradation and salinification thereby making the soil non-arable. Meanwhile on the mountain regions, melting glaciers caused by rain falling on snow leads to mountain floods, avalanches and extreme rockslide and thereby disrupting agricultural produce and wildlife.
Explanation:
Explain why it is not advisable for two sickle cell carriers to marry.
Answer:
it results in pleiotropic effect and caused death of an offspring.
a scientist is is using a microscope to observe a type of bacteria
Answer:
If your question is: Which two structures would the scientist most likely see? Then:
A scientist is using a microscope to observe a type of bacteria. The scientist most likely see cell wall and vacuole.
2. Which of the following is not considered an
organism?
a. an oak leaf
b. a spider
c. an elephant
d. a bacterial cell
Answer:
a. an oak leaf
Explanation:
Bacterial cells would undergo this type of reproduction, Binary Fission. An asexual reproductive process where a single bacterium splits into 2 additional bacteria, each having the same bacterial DNA and or genome as the original bacterium.
So the answer is D
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