Answer:
The correct answer is d.
Explanation:
Regulatory T-cells are a class of T cells which are part of the immune system that suppresses immune response. They are called regulatory because they assist in "checking" the excesses/overreaction during immune response.
NOTE:
Neutrophils are phagocytic in nature; they ingest and destroy microorganisms or other foreign molecules.
Plasma cells synthesize antibodies which are produced in response to antigens. They are target foreign particles for digestion by other immune cells.
Macrophages are also phagocytic in nature usually found at sites of an infection.
When adding more sucrose to a 0.7 M sucrose solution, why does it not dissolve as readily as it did at a lower molarity?
a) the ions in the solution interact with the sugar and that interferes with its solubility
b) the solubility of the solute depends on wether the solute has hydroxyl functional groups or not
c) the solute molecules adhere to the polar regions of the water molecules so there is no room for more sucrose molecules
d) hydrogen bonds in the water molecules change the electrical charge of the sugar molecule, which prevents it from dissolving further in the water
Answer:
c) the solute molecules adhere to the polar regions of the water molecules so there is no room for more sucrose molecules
Explanation:
A solution contains a solvent (water in this case) and a solute (sucrose in this case). A solution can either be saturated or unsaturated depending on whether it can still dissolve a solute or not.
According to this question, the 0.7 M sucrose solution does not dissolve the sucrose (solute) any longer. This implies that the sucrose solution is getting SATURATED. The saturation of the sucrose solution occurs because the amount of solutes is equating the amount of solvent in the solution.
The solubility of a solution depends upon polarity. The solute molecules (sucrose) adhere to the polar regions of the water molecules (solvent). When this occurs to the point where no other sucrose molecule can adhere, the solution becomes SATURATED so there is no room for more sucrose molecules.
Explain how the Hershey-Chase experiment used bacteriophages with radioactive sulfur and radioactive phosphorus to demonstrate that DNA, and not protein, is the carrier of genetic information.
Answer:
He separated the phages into radioactive sulfur-containing protein ghosts and radioactive phosphorus-containing DNA. They found that the radioactive sulfur protein ghosts could attach to bacterial membranes while the radioactive phosphorus DNA could not
Answer:
He separated the phages into radioactive sulfur-containing protein ghosts and radioactive phosphorus-containing DNA. They found that the radioactive sulfur protein ghosts could attach to bacterial membranes while the radioactive phosphorus DNA could not
Explanation:
2. What is the function of the cell membrane?
Answer:
it protects the cell. it act as a receptor. it regulates the transport of substancesit receives chemical messenger from other cells.4. Distinguish between the types of scientific
investigations. Does all scientific knowledge
come from experimentation? Explain your
answer. SC.7.N.1.3
Answer: Descriptive, Comparative and Experimental (which comes from experimentation).
Explanation:
There are three types of scientific investigations:
Descriptive: This type of scientific investigation studies parts of a system, which can be natural or artificial. It describes everything that is being studied and no predictions are made. There are three types of descriptive methods: case-study methods (an in-depth study is produced from many sources with different methods), observational methods (no questions asked, just an observation of the behavior of a subject and no manipulation of the variables), and survey method (some people are interviewed and the researchers study the answers.)Comparative: It gathers information from organisms, systems, places or from any source, to compare them using also a control group. But, there is no imposed treatment because it is not ethical or because it is not possible. So, the treatment is only observed.Experiment: As its names says, it uses an experimental test designed to study some phenomena, where variables are controlled so the treatment is not only observed as the comparative method. Then those variables are measured to collect information or evidence that supports or not a previous hypothesis and is used to assess theoretical knowledge. The independent variable is manipulated while the dependent variable is measured. This type of scientific investigation comes from experimentation._______ behavior is inherited and programmed in the genetic code.
When a deer hears a sound in the forest, such as crackling footsteps, it immediately freezes and then bolts through the bushes. This is an example of the _______ response.
Mating rituals or displays can be very complex but are also _______ behaviors.
When animals fight and one wins and one submits, this allows for the establishment of a _______. This means that one animal (the winner) likely gets to reproduce and lead the group.
_______ behavior is used to intimidate other animals in social interactions. Examples include baring teeth or growling.
_______ behaviors rely on prior practice or experience.
When a dog is sleeping and does not react to the sound of a person walking around the house, that is most likely an example of ________.
A common type of learning that involves experimenting to get a reward is called _______.
_______ is the pattern of behavior that follows the day/night cycle.
Many bird species have seasonal behaviors that cause them to _______ or change their location.
Explain how territorial behavior helps an animal population survive.
Answer:
Innate
fight or flight
innate
hierarchy
Aggressive
Learned
habituation
trial and error
Circadian rhythm
migrate
When animals mark their territory they ensure that the mates and food in their area are not overwhelmed. Though territorial animals often fight, it is not to the death, and more to establish social order. This prevents them from over-eating their environment and helps the entire species stay in balance to survive.
Explanation:
PF
Answer:
Innate
fight or flight
innate
hierarchy
Aggressive
Learned
habituation
trial and error
Circadian rhythm
migrate
When animals mark their territory they ensure that the mates and food in their area are not overwhelmed. Though territorial animals often fight, it is not to the death, and more to establish social order. This prevents them from over-eating their environment and helps the entire species stay in balance to survive.
Explanation:
PENN
QUICK PLZ HELP MEEE!!!! ASAP 25POINTS
Answer:
Plant 1 grew steadily. Plant 2 grew quickly at first and then stopped growing.
Explanation:
You can tell that Plant 1 grew steadily because the growth for the plant can almost be represented by a linear equation. You can tell that Plant 2 grew fast at first and stopped growing because of its increase towards the beginning on the graph and how the line because horizontal later on. I hope this helps!!!
A science class investigated the relationship between the amount of time
students spend doing chores every night and their average grades on
schoolwork. Which statement from the lab report best represents a
conclusion?
A. Based on our results, students who do 1 hour of chores per night
have grades that are on average 0.2 points higher than students
who do no chores.
B. Doing chores at night actually helps students do better at school,
even if it seems like the opposite would be true.
C. We believe that students should spend at least 2 hours doing
chores every night if they want to get better grades at school and
help their families.
OD. If students spend at least 1 hour per night on chores, then they are
guaranteed to get higher grades on their schoolwork.
Answer:
A. Based on our results, students who do 1 hour of chores per night
have grades that are on average 0.2 points higher than students
who do no chores.
Explanation:
In a scientific experiment that employs the scientific method, series of steps should be followed. The steps involved in the scientific method include; making an observation/asking a question, formulating a hypothesis, testing the hypothesis, analyzing the result, drawing a conclusion etc.
From this step, we would notice that DRAWING CONCLUSION immediately follows the analysis of result, which means the conclusion is based on the result of the experiment. A conclusion in a scientific experiment should be factual and based on the measured result. It should either reject or accept the hypothesis.
The best representation of a conclusion is A. Based on our results, students who do 1 hour of chores per night have grades that are on average 0.2 points higher than students who do no chores. This statement has a conclusive content unlike other options that still seemed unlikely.
Answer:
A
Explanation:
Did the quiz
In a healthy, functioning ecosystem, chemicals and nutrients are constantly recycled and reused
True or false
Pt3 can you all help me
Which carbohydrate can be used by the body as an immediate source of energy?
glucose
cellulose
chitin
glycogen
Answer:
The answer is glucose
Answer:
It would be the first one "glucose"
Explanation:
1. Which of the following things is common to all living organisms? it for a test so I need it quick!
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Competition is central to the theory of natural selection. Why does competition occur?
View Available Hint(s)
females must choose among possible mates
males must defend their territories
organisms are naturally antagonistic
O organisms typically produce too many offspring and resources are limited
O all of the listed responses are correct
Answer:
Competition is central to the theory of natural selection. Why does competition occur? Organisms typically produce too many offspring, and resources are limited. All organisms, including prokaryotes and eukaryotes, use essentially the same genetic code.
Explanation:
All organisms, including prokaryotes and eukaryotes, use essentially the same genetic code.
Following massive damage to his frontal lobes, Phineas Gage was most strikingly debilitated by: auditory hallucinations. O memory loss. O speech loss. antisocial and aggressive behavior.
Answer:
maybe he needs dietary fibre
Following massive damage to his frontal lobes, Phineas Gage was most strikingly debilitated by antisocial and aggressive behavior. The correct option is D.
What is the brain?The brain is the most important part of the body. It controls and runs all functions of the body. It is walnut shaped and present in the head of the body. The brain is divided into two hemispheres. The left and the right hemisphere.
The brain is also divided into frontal and parietal lobes. The frontal lobe is present in the front section, and it controls social interaction, problem-solving, motor functions, etc.
So if the frontal lobe will be affected, the social behavior also gets affected and the person becomes irritable and aggressive.
Thus, the correct option is D, antisocial and aggressive behavior.
To learn more about the frontal lobe, refer to the link:
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When NaCl is added to water, its bond will break. If C6H12O6 (glucose) is added to water, its bonds will not break.
True
False
Answer:
False.
Explanation:
The bonds become so strong that they make the glucose molecules separate.
The chart below lists different plant species with a description of adaptations. Plant Species Adaptation Turkey Feet Grass This plant has very deep roots to prevent soil loss in windy areas, and to help anchor the plant. Pinkflower Hedgehog Cactus Contains spines for protection, and a waxy coating on the sunny side of the plant to help prevent water loss. Devil’s Walking Stick Secrete chemicals as a defense mechanism, and have broad leaves to catch sunlight in shady areas. Hairy Manzanita Pale pink flowers attract humming birds for pollination. Which plant species above is best adapted for a grassland biome? a Turkey feet grass b Pinkflower hedgehog cactus c Devil's walking stick d Hairy Manzanita
Answer:
A) Turkey feet grass
Explanation:
Grassland biome is one of the biomes that makes up the Earth's biosphere. Due to the characteristics of this biome (grassland), it favours the abundance of grass species over trees and shrubby plants. These characteristics include a low annual rainfall, soil's susceptibility to wind erosion etc.
Based on these characteristics, an organism that will thrive in this biome must be structurally adapted to it. This is the case of the Turkey feet grass mentioned in the question. The Turkey feet grass possess very deep roots to prevent soil loss in windy areas, and to help anchor the plant. This is as a result of soil loss common to the soil of grassland biomes.
in atom structure what is present in the same numbers as the protons in an atom.i will make as brainlest
Answer:
Explanation:
electrons i believe. That is why an atom has a neutral charge- electrons and protons cancel each other out
Answer:
Electrons
Explanation:
An atom contains the same number of protons as electrons to maintain a negative charge. An ion is an atom which has lost or gained electrons.
Explain the formation of sedimentary rocks?
sedimentary rocks are types of rocks that are formed by the accumulation or deposition of small particles and subsequent cementation of mineral or organical particles on the floor of oceans or other bodies of water at the earths surface
Explanation:
Study the graph.
What was the total distance traveled after 2.3 seconds?
A.) 205 meters
B.) 175 meters
C.) 140 meters
D.) 190 meters
which is flatworms locomotory organ tell the answer in full sentence
Answer:
Movement in some flatworms is controlled by longitudinal, circular, and oblique layers of muscle
hope this helped you
please mark as the brainliest (ㆁωㆁ)
On the pH scale, a 7 indicates _____. neutrality an acid a base
Answer:
a 7 indicates neutrality
less than 7 is an acid
more than 7 is an alkaline, or a base
Explanation:
your pH scale ranges from 0-14
7 is neutral
less than 7 is an acid
more than 7 is an alkaline, or a base
Answer:
Neutrality
Explanation:
What causes surface tension in water?
Answer:
the molecules on the surface to contract and to resist being stretched or broken.
Explanation:
What's an example of a monosaccaride?
Answer:
Glucose
Explanation:
Any simple sugar, like glucose, is a monosaccaride.
Aristarchus believed in the Sun-Centered Universe
O True
O False
Answer:
Its True ,
Explanation:
The sternum is _ to the spinal column
Answer:
attached
Explanation:
What are the only types of
cells to contain a cell
membrane?
Answer:
Plant Cells
Explanation:
What is a secondary crime scene?
Answer:hope this helps
SECONDARY CRIME SCENES. A location related to the crime but not where the actual crime took place. Sometimes this is the only scene that investigator's know about. There can be MANY secondary crime scenes.
Explanation:
Which of the following statements concerning ribosomes is true?
A. Several ribosomes are often attached to and translating the same MRNA.
B. Ribosomes join amino acids together to form a polypeptide.
C. Ribosomes have one binding site for MRNA and three binding sites for 1RNA molecules.
D. Ribosomes are the organelles responsible for protein synthesis.
E. All of the above statements are true.
Answer:
E. All of the above statements are
Explanation:
Ribosomes are organelles found free floating in the cytoplasm or attached to endoplasmic reticulum (RER). They are the site of protein synthesis in a cell. Ribosomes initiate the translation process by binding to the mRNA molecule using their mRNA binding site. Several ribosomes called POLYSOMES are often attached to and translating the same MRNA molecule.
A ribosome contains four (4) binding sites; one for the mRNA and three (P-site, A-site and E-site) for tRNA, which are small RNA molecules that carry and add amino acid to the growing polypeptide chain during the process. In a nutshell, the ribosome via the aid of tRNA is responsible for joining amino acids together to form a polypeptide chain (future protein).
Ribosomes are complicated macro molecules composed up of nucleic acids and proteins. They are important as they perform a major role in protein assembly and transportation.
The correct answer is:
Option E. All of the above statements is true.
The explanation for the above option is:
The ribosome is located either free or is connected to the endoplasmic reticulum(RER).Ribosomes assist in the translation of the information from mRNA.Polysomes are numerous ribosomes connected to a single mRNA molecule.Ribosomes have one binding position for mRNA and three binding positions for tRNA molecules.The three binding sites for tRNA is (A- site) amino acyl site, (P-site) peptidyl site and (E site) the exit site.Ribosome assembles amino acids to form a polypeptide chain. These polypeptides get transported to the cytoplasm.Therefore all the above statements are true for ribosomes.
To learn more about ribosomes follow the given link:
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In aquatic ecosystems, phytoplankton and other photosynthetic organisms appear in the upper layer of the water, but not deeper layers. Which statement explains this distribution?
ANSWER :
The deeper layers are too dark for photosynthesis to occur.
Explanation:
Photosynthesis is a unique process to autotophic organisms. It involves the use of light energy from the sun to manufacture organic molecules (food). As the phenomenon implies i.e. PHOTO - LiGHT, light is an unnegotiable requirement for photosynthesis to take place. Autotrophs are able to perform this process because they contain pigments (Chlorophyll) that can trap energy from sunlight.
In an aquatic ecosystem, phytoplanktons and other photosynthetic organisms like aquatic plants are the autotophic organisms. They are found in the upper layer of the water so that they can reach light from the sun. The light from the sun cannot travel deep down the water making the deep parts of the ocean be deprived of light.
This is the reason why photosynthetic organisms cannot be found in the deep parts of the water as they will be unable to have access to the light from the sun in order to perform photosynthesis.
Answer:
the answer is a
Explanation:
I want to see how tall plants will grow depending on what they are planted
in; soil, sand, or soil and sand mixture. I think the plants will get the tallest in
the mixture. What did I just make?
Answer:
soil
Explanation:
because I have a I tried plant them in the mixture but it didn't work out so I used in stead because it work well plant grow 3 ft and if give the plants a lot water and sun will help too
embryology is the study of a _______which is a fertilized egg attached to the wall of the mothers uterus
Fill in the blank
Answer:
Embryology is the study of a embryo which is a fertilized egg attached to the wall of the mothers uterus by umbilical cord.
Embryology refers to the study of an embryo, which is a fertilized egg attached to the wall of the mother's uterus.
What is embryology?Embryology can be defined as a branch of biology that involves the study of the early development of a fetus and an embryo from a single-celled zygote, especially in female organisms (mothers).
In this context, we can infer and logically conclude that embryology involves the study of an embryo, which is a fertilized egg that is typically attached to the wall of the mother's uterus.
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