Answer:
Explanation:
In Mirabilis jalapa also known as the 4'o clock plant, flower colour shows incomplete dominance that is why the F1 plant obtained by the crossing of pure Red flowered plant(RR) with pure white flowered plant(rr) shows pink flowers(Rr).
When F1 plant(Rr) is crossed is with pure white flowered plant (rr), the plant obtained would have a genotype of Rr and rr in ratio 2:2
While the phenotype will be 2 pink and 2 white at of 2:2
The phenotypic ratio of the offspring will be 2:2
Rr × rr
!
Rr Rr rr rr
Imagine we have labeled tetrodotoxin (TTX) so that it can be seen with a microscope. If we wash this TTX onto a neuron, what parts of the cell would you expect to be labeled?
A. Axons
B. Mitochondria
C. Dendrites
D. Cell bodies
Answer:
C
I just didnt do it
Explanation:
Axon is the part of the nerve cell which would be expected to be labelled which can be seen by washing TTX onto a neuron. Thus, the correct option is A.
What is Tetrodotoxin (TTX)?
Tetrodotoxin (TTX) is a natural toxin which interferes with the function of voltage-gated sodium channels in the cell membrane. Tetrodotoxin blocks the sodium permeable pore in the membrane by binding tightly to a specific part outside the channel proteins and block all the sodium-dependent action potentials in the membrane.
Applying TTX to a neuron would block all the impulses in the neuron, preventing it from firing action potential, regardless of the impulse. Labeled TTX could be visualized on the cell's axon, where the voltage-gated sodium channels are concentrated.
Therefore, the correct option is A.
Learn more about Tetrodotoxin here:
https://brainly.com/question/2927710
#SPJ5
An A/a; B/b dihybrid is testcrossed, and about ¾ of the progeny phenotypically resembles the dihybrid parent, while ¼ resembles the tester parent. If the dihybrid parent was selfed, what would be the expected phenotypic ratio in the progeny?
a. 9:3:4
b.12:3:1
c. 9:3:3:1
d. 9:7
f. 15:1
e.13:3
Answer:
The expected phenotypic ratio in the population will be 15:1
Explanation:
Due to technical problems, you will find the complete explanation in the attached files.
Living things need to maintain their internal environment . This is known as homeostasis What role does homeostasis play in controlling the rate of chemical reactions in our bodies ?
Answer:
Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.
Autotrophs differ from heterotrophs in that only autotrophs
Answer:Autotrophs differ from Heterotrophs in one fundamental way what is it
Summary. Autotrophs store chemical energy in carbohydrate food molecules they build themselves. Most autotrophs make their "food" through photosynthesis using the energy of the sun. Heterotrophs cannot make their own food, so they must eat or absorb it.May 6, 2020
Explanation:
Methamphetamine increases the brain's levels of dopamine, __________ and __________.
a) norepinephrine, serotonin
b) GABA, epinephrine
c) acetylcholine, enkephalins
d) glutamate, serotonin
Answer:
a) norepinephrine, serotonin
Explanation:
Neurotransmitters are special lipid-based molecules used in chemical signal transduction in the nervous system. They have receptor-specific roles in activating different regions of the central nervous system (CNS) and physiological responses. These include: dopamine, norepinephrine, and serotonin .
The CNS, which includes the brain and spinal cord, can be affected by certain drugs like methamphetamine. This drug is a stimulant that acts on brain regions such as:
prefrontal cortex the striatumthe nucleus accumbensIt causes the release of neurotransmitters while blocking their reuptake at synapses; meth is metabolized very slowly over time (12 hours). The buildup of dopamine, for instance, leads to altered moods, feelings of pleasure and euphoria.
Thus, this change or "high" leads to dependency by users for its mood-altering effect; however, less dopamine is released, and the pleasurable effects, become less potent. Studies show neurological damage with prolonged use, and habit formation and over time, addiction.
when you see a red rose, all the colors of light are being absorbed except witch of the following
Answer:
U
Explanation:
What are the steps in the scientific process to test whether plants need water to survive?
Answer:
Please find the detailedly explained steps below
Explanation:
Scientific investigation involves the use of the SCIENTIFIC METHOD, which involves series of steps including:
- Making an observation/Asking a question
- Formulating a hypothesis
- Testing the hypothesis
- Analysing the result
- Conclusion
1) Making an observation/Asking a question: An observation is initially made prior to any investigation. In this case, the observation is whether plants need water to survive. A scientific question can be asked by saying DO PLANTS NEED WATER TO SURVIVE?
2) Formulating a hypothesis: After a question has been asked or an observation has been made, a HYPOTHESIS, which is a testable explanation given to solve or answer the problem is given. A hypothesis is usually in an IF, THEN format. A hypothesis concerning the observation can go thus: IF plants are not supplied with water, THEN they will not grow.
3) Testing the hypothesis: In order to test the hypothesis, an experiment is conducted. This experiment is set up in such a way that two group of plants are used. One group receives water (experimental group) while the other doesn't receive water (control group). The water is the INDEPENDENT VARIABLE while the plant growth measured is the DEPENDENT VARIABLE.
4) Analysing the result: The results of the experiment are analysed and computed in an organized way that can be comprehended.
5) Conclusion: This is the point where the hypothesis will be accepted or rejected based on the results of the experiment. For example, in this case, if plants that are not supplied with water grows, the hypothesis will be REJECTED.
Azariah is trying to describe a wave. Which example would be the best description?
A. two toy cars driving away from each other at the same speed
B. two toy cars driving parallel to each other at the same speed
C. a toy car rear-ending a toy car that then rear-ends another toy car
D. a toy car hitting a wall and bouncing back
Answer: c
Explanation:
Waves transfers energy
Answer:
c
Explanation:
in unicellular organisms, what makes up the organism
Answer:
Unicellular organisms include bacteria, protists, and yeast.
Explanation:
describe the functional and comparative genomics
Answer:
Comparative genomics is a field of biological research in which researchers use a variety of tools to compare the complete genome sequences of different species. By carefully comparing characteristics that define various organisms, researchers can pinpoint regions of similarity and difference.
Functional genomics is a field of molecular biology that attempts to describe gene (and protein) functions and interactions. Functional genomics make use of the vast data generated by genomic and transcriptomic projects (such as genome sequencing projects and RNA sequencing).
Explanation:
If the heart rate drops and the stroke volume increases, cardiac output will always show a
decrease.
O True
False
Answer:
False
Explanation:
hope this helped! :)
What is the atomic number of this atom?
а, b,c
08
O 13
09
. 5
0 4
oxygen number 8
13 is aluminum
09 is fluorine
05 is boron
4 beryllium
An example of a succulent is a _
Answer:
Agavoideae
Explanation:
What role do plankton play in the oxygen cycle?
O A. They release carbon dioxide in the ocean.
O B. They produce oxygen in the forests.
C. They produce oxygen in the ocean.
D. They absorb carbon dioxide in the forests.
What do populations need to grow? *
Answer:
Populations of people need things such as agriculture, housing, food, animals, and the economy. They also need such things such as music, plays, arts, books, instruments, and more to thrive.
Explanation:
Pls help ASAP! This is due today!
It is known that complex carbohydrates provide more sustained energy over time than simple sugars such as sucrose. Complex carbohydrates are polysaccharides, which are long chains of smaller sugar molecules bonded together. Simple sugars are monosaccharides that contain only one molecule.
Why do complex carbohydrates provide more energy over time versus simple carbohydrates?
Answer:
Complex carbohydrates contain longer chains of sugar molecules than simple carbohydrates. The body converts these sugar molecules into glucose, which it uses for energy. As complex carbohydrates have longer chains, they take longer to break down and provide more lasting energy in the body than simple carbohydrates
Explanation:
Answer:
A.) Complex carbohydrates have more chemical bonds to break than simple sugars, which takes longer for the body to digest and provides more units of energy for the body to use.
Proof:
PLEASE HELP I WILL GIVE BRAINLIEST(10 points)
NON SERIOUS ANSWERS WILL BE REPORTED
What substance in the esophagus lining helps make swallowing easier?
a.
saliva
b.
pepsin
c.
mucus
d.
bile
Please select the best answer from the choices provided
A
B
C
D
Answer:
The awnser is c. mucus good luck!
Explanation:
Humans deplete the most resources when
Answer:
Resource depletion is the consumption of a resource faster than it can be replenished. Natural resources are commonly divided between renewable resources and non-renewable resources (see also mineral resource classification). Use of either of these forms of resources beyond their rate of replacement is considered to be resource depletion. The value of a resource is a direct result of its availability in nature and the cost of extracting the resource, the more a resource is depleted the more the value of the resource increases. There are several types of resource depletion, the most known being: Aquifer depletion, deforestation, mining for fossil fuels and minerals, pollution or contamination of resources, slash-and-burn agricultural practices, Soil erosion, and overconsumption, excessive or unnecessary use of resources.
Resource depletion is most commonly used in reference to farming, fishing, mining, water usage, and consumption of fossil fuels. Depletion of wildlife populations is called defaunation.
Explanation:
Sound quality can be divided
If you followed a woman's cells through meiosis, at what stage of meiosis would the amount of DNA in one of these cells be equal to the amount of DNA in one of her G1 phase (before DNA replication) kidney cells
Answer:
at the end of the meiosis I
Explanation:
At the end of meiosis I, the resulting number of chromosomes is equal to the number of chromosomes as the original diploid (2n) parent cell. Moreover, at the final of meiosis II, each daughter cell will have half of the number of chromosomes as the original parent cell, i.e., a haploid (n) number of chromosomes. All the somatic cells have a diploid number of chromosomes, while gametic cells have a haploid number of chromosomes. Kidney cells are somatic cells. In humans, each diploid cell contains 46 chromosomes (i.e. 23 pairs of chromosomes), while gametic cells (i.e., egg and spermatic cells) have 23 chromosomes. In consequence, in humans, kidney somatic cells and cells at the final of the meiosis I will have the same number of chromosomes (i.e., 46 chromosomes).
Which are correct examples of physical (P), chemical (C), and biological (B) barriers?
P: complement system; C: saliva; B: coughing
P: coughing; C: saliva; B: complement system
P: coughing; C: sneezing; B: complement system
P: complement system; C: saliva; B: sneezing
Answer:
(Explanation is answer) Hope this helps. Brainliest pls
Explanation:
The innate immune response is the first mechanism for host defense found in all multicellular organisms. The innate immune system is more ancient than the acquired or adaptive immune response, and it has developed and evolved to protect the host from the surrounding environment in which a variety of toxins and infectious agents including bacteria, fungi, viruses and parasites are found (1).
The immune system is complex and is divided in two categories: i) the innate or nonspecific immunity, which consists of the activation and participation of preexistent mechanisms including the natural barriers (skin and mucosa) and secretions; and ii) the adaptive or specific immunity, which is targeted against a previously recognized specific microorganism or antigen. Thus, when a given pathogen is new to the host, it is initially recognized by the innate immune system and then the adaptive immune response is activated (2). Innate immunity is the host’s first line of defense and is intended to prevent infection and attack the invading pathogens.This nonspecific mechanism is fast (minutes to hours) while the adaptive response takes longer (days to weeks).
Innate immunity is comprised of different components including physical barriers (tight junctions in the skin, epithelial and mucous membrane surfaces, mucus itself); anatomical barriers; epithelial and phagocytic cell enzymes (i.e., lysozyme), phagocytes (i.e., neutrophils, monocytes, macrophages), inflammation-related serum proteins (e.g., complement, C-reactive protein, lectins such as mannose-binding lectin, and ficolins); surface and phagocyte granule antimicrobial peptides (e.g., defensins, cathelicidin, etc.); cell receptors that sense microorganisms and signal a defensive response (e.g., Toll-like receptors); and cells that release cytokines and inflammatory mediators (i.e., macrophages, mast cells, natural-killer cells). Once the interaction host-invader pathogen enters, a signaling cascade is initiated which enhances the immune response and activates specific mechanisms (3-5). This natural immune response is designed to: a) prevent infection, b) eliminate invader pathogens, and c) stimulate the acquired immune response.
The correct examples of physical, chemical, and biological barriers are coughing, saliva, and complement system respectively.
What do you mean by Barriers?Barriers may be defined as something that blocks the free passage of any object, compound, or thing.
Coughing mediates the physical barrier that kills the pathogen and improves the body's immune system at the physical level. Saliva consists of an enzyme that kills the pathogens on body surfaces, so it is classified under a chemical barrier. Biological barriers involve the action of the complement system which performs the activity of lysis of pathogen particle and stimulate the body's immune response.
Therefore, the correct examples of physical, chemical, and biological barriers are coughing, saliva, and complement system respectively.
To learn more about Biological barriers, refer to the link:
https://brainly.com/question/24881456
Seed production and fruit production occurs in the ________ of plants
-PLEASE ANSWER!!!
A. Root System
B. Shoot System
C. Reproductive System
Answer:
the answer is c
Explanation:
Most of the concentration of which gas results from the activity of producer organisms?
carbon dioxide
nitrogen
oxygen
water vapor
Answer:
oxygen
Explanation:
I think it's oxygen, if not I'm sorry
The concentration of which gas results from the activity of producer organisms is oxygen. Thus, option C is correct.
What is the role of producers in the process of photosynthesis?
Producer organisms that has been included the plants as well as algae and refer to the organisms that are able to produce their own food by the synthesizing it from inorganic matter. This has been what plants and algae are able to do just through the process of the photosynthesis.
During photosynthesis, these has been organisms produce food for themselves and in doing so they produce the oxygen as a by-product. This has been what contributes mostly to the concentration of oxygen in the atmosphere.
Strontium and oxygen is a pair of atoms that would exhibit ionic bonding. During the process of photosynthesis has been defined as the process by which green plants prepare their own food in the presence of sunlight and during this process heat energy has been converted into chemical energy.
Therefore, The concentration of which gas results from the activity of producer organisms is oxygen. Thus, option C is correct.
Learn more about photosynthesis on:
https://brainly.com/question/1388366
#SPJ2
Please select the word from the list that best fits the definition
Churns and breaks down food into a liquid form
A) mouth
B) stomach
C) esophagus
this is on edge2020
describe the unique intercellular connections between muscle cell
The unique intercellular connections between muscle cells are called intercalated discs. They are in the cardiac muscle. An intercalated disc has gap junctions and desmosomes, which are two ways that cells use to communicate with each other. Gap junctions connect neighbor cells, and desmosomes keep the cardiac cells together.
Cardiac cells are connected by intercalated discs, which has two structures:
Gap Junctions:They are channels that communicate cells that are next to each other. Gap junctions allow the passage of ions quickly so that all the cardiac fibers can contract in a coordinated and fast way.
Desmosomes:They are at the ends of the cardiac fibers, and they hold the cells together thanks to the different proteins that form this structure. As they can resist a lot of effort, they are one of the cardiac cell's junctions.
Learn more at:
https://brainly.com/question/23416641?referrer=searchResults
Which theory is represented in this diagram?
The theory that complex cells evolved after primitive cells engulfed bacterial cells that continued functioning
The theory that all living organisms share the same basic genetic components
The theory that organisms function best when their internal conditions are maintained within narrow limits
The theory that all living organisms are made of cells
The correct answer is A. The theory that complex cells evolved after primitive cells engulfed bacterial cells that continued functioning.
Explanation:
This diagram shows how a primitive cell or a cell containing only genetic material evolves into a complex cell with specific organelles such as chloroplast or mitochondria by engulfing or integrating other cells, especially prokaryotic cells that continue living in the primitive cell and become specialized organelles. This process supports the theory the evolution of cells was possible as simple cells engulfed bacteria because as the diagram shows the engulfed bacteria evolved into organelles that make the cell become more complex as there were specific structures in the cell for different functions.
Which would most likely be found as a petrified fossil form?
frozen mammoth
fish skeleton on the shore
dinosaur skeleton
insects in amber
Answer:
dinosaur selection
Explanation:
over time the selection is covered by sediment and is replaced by minerals
Answer Dinosaur Skeleton
Explanation:
trust me, im big brain
Which of the following statements is true of a green apple?
It reflects green light and absorbs other colors
It absorbs green light and reflects other colors
It reflects green light and emits other colors
It transmits all colors except green.
It transmits green light and absorbs everything else.
Answer:
reflects green light and absorbs all other colours
Explanation:
(HELP ME PLEASE ILL GIVE BRAINLIEST)
A medical imaging scan that includes a patient's right lung, heart, and left lung is examined. The scan doesn't indicate in which plane it was taken. Based on the contents of the image, which plane can be ruled out automatically?
A. The sagittal plane
B. The transverse plane
C. The coronal plane
D. The anatomical plane
Answer:
I believe the answer is C.
