An example of a non-specific barrier is the skin. Thus, the correct option is A.
What are non-specific barrier?Non-specific barriers are the innate, or nonspecific type of immunity of the defense system with which a person is born with. Non-specific barrier protects a person against all the antigens. Innate immunity involves the barriers which keep the harmful materials from entering the body. These barriers form the first line of defense in the immune response of an individual.
Nonspecific defense mechanisms include the skin, mucous membranes, secretions, excretions, enzymes, inflammatory responses, genetic factors, and the behavior patterns.
Skin is a physical and non-specific barrier which is covered with oily and acidic pH which ranges from 3 to 5, and the secretions from sebaceous and sweat glands, respectively.
Therefore, the correct option is A.
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Evolutionary reversals (character losses) are also common among living members of a vertebrate lineage and early members of the lineage. Choose examples that illustrate this observation. Select the three correct statements. Select the three correct statements. Hagfishes lack legs. Birds have shelled eggs. Sharks lose old teeth. Sharks have eggs with protective coats. Living birds lack teeth. Most mammals lack shelled eggs. Whales and snakes lack legs.
Answer:
Living birds lack teeth.
Most mammals lack shelled eggs.
Whales and snakes lack legs.
Explanation:
Living birds lack teeth, Most mammals lack shelled eggs and Whales and snakes lack legs are the characteristics that are present in modern animals as compared to their ancestors. These changes occur in the organism due to evolution that occurs with the passage of time and the main reason for that is change occurs in the environmental conditions for organism which force them to make changes which is best for the environment.
The angle of Earth's tilt has changed throughout Earth's history and is still changing today. If Earth's tilt were to decrease
from 23.5° to 20.2°, which of the following changes do you expect would occur
Answer:
The world climate would drastically change.
Explanation:
First off, both poles would have rapid expansion, with the freezing of more water near the poles.Many species of trees and plants would die out in certain areas, since they tend to be in their ideal locations, so the change in climate will make the northern parts of many habitats destroyed.Deserts would expand and the average temperature would rise.Also, many animals would also die out, because of the change in their environments.Conifers would shift southward, causing many forests / parts of forests to turn into wastelands, causing the earth's oxygen production to decrease.Answer:
Changes between seasons would be less drastic. (Is the right answer)
Explanation:
Person above is wrong
Which is an example that shows evidence of evolution?
1- Gravity
2- Fossils
3-Sea floor spreading
Answer:
2
Explanation:
the fossils are the evidence of evolution
Answer:
Fossils
Explanation:
Fossils:fossils are the traces or impressions of dead plants and animals preserved in the rocks.The study of fossils is the strongedt evidence to support evolution.Nowadays,the age of fossils can also be determined accurately by using carbon dating process.Studying fossils have revealed the organisms in past is different from the present days.It also shows gradual process from simple to complex forms as time passes.Thus the study of fossils support the study of evolution.
Question 4 (2 points)
Which system has atoms with the highest average kinetic energy?
room temperature
non of these
cold water
warm water
Answer:
warm water
Explanation:
Kinetic energy refers to the energy that possesses an object due to the motion of its molecules. Kinetic energy is positively associated with temperature. When heating water, water molecules gain kinetic energy and move faster than the molecules of cold water. In consequence, the temperature of an object can be considered as the average amount of kinetic energy that its molecules carry.
PLZZZ AWNSER QUICK I WILL GIVE BRAINLIEST TO WHOEVER AWNSERS RIGHT
Answer:
im sorry ill answer just need a better picture I can barely tell wth it is :/
I think its a d c b sorry if I'm wrong its hard to see :/
Explanation:
i need help asap, that would be great!
Answer:
the 4th one
Explanation:
Answer:
secondary succession
Explanation:
just read it
In what way does translation change form?
Why is it important to know about poisonous plants?
Answer:
Poisonous plants
Explanation:
we all know, that plants are almost everywhere, from your bedroom to the biggest places in the world, however some plants can be dangerous and poisonous which we have to avoid touching in all circumstances, it is highly significant to tell the difference between a normal living thing and a venomous living thing, to protect you health and other's health too.
What pattern of growth will a population with limited resources show?
Select one:
O a. density-independent
O b. logistic
O c. exponential
O d. density-dependent
Answer:
b. logistic
Explanation:
Logistic growth occurs when growth begins as exponential but then slows and flattens out (or becomes constant) at a certain point. The growth of a population is logistic because at the beginning all populations growths are exponential. This is because there are more than enough resources when a population is small. However, once a population reaches carrying capacity, which is the limit an environment can hold, resources begin to run out and the growth becomes slower and constant. Logistic growth is also known as an "S curve" because on a graph the growth resmbles an S.
The vast variety of different traits found in
humans results from
(1) intensive training and education
(2) sexual reproduction and mutations
(3) exercise and conditioning
(4) birth defects and recessive genes
8. Why does a virus require a living cell in order to reproduce?
O A virus does not contain organelles or cytoplasm.
O A virus does not contain a nucleic acid.
O A virus does not contain proteins or lipids.
O A virus does not contain genetic information.
Answer:
A virus doesn't contain genetic information
help please!! thank you
Answer:
I think stationary
Explanation:
the gravitational force and normal force cancel out and make it balanced aka stationary
Answer:
first and last box im 95% sure
Explanation:
Question 20 of 25
How are photosynthesis and cellular respiration related?
A: Photosynthesis produces water molecules, while cellular respiration splits water molecules apart
B: Cellular respiration is the process animals use to produce glucose, while photosynthesis is the process plants use to produce glucose C: Cellular respiration breaks down glucose, while photosynthesis produces glucose
D: Photosynthesis releases energy, while cellular respiration stores energy
Answer:
Cellular respiration converts oxygen and glucose into water and carbon dioxide.
Explanation:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
Name and describe the process which involves the iris controlling the amount of light entering the eye when a person is exposed to bright light
Answer:
The iris has an adjustable circular opening called the pupil, which can expand or contract to control the amount of light entering the eye, Fromer said. Ciliary muscles surround the lens.
To obtain energy from starch and glycogen, the body must begin by Group of answer choices converting both starch and glycogen to fatty acids. removing one glucose at a time with a condensation reaction. hydrolyzing both starch and glycogen to glucose. hydrolyzing the starch to glucose and the glycogen to amino acids.
Answer:
Hydrolyzing both starch and glycogen to glucose
Explanation:
Starch and glycogen are both forms of carbohydrates called "polysaccharide" found in the foods we consume. Polysaccharide are polymers that constitutes several monomeric units called monosaccharides. Monosaccharides are the forms in which the body can absorb energy.
Hence, starch and glycogen as polysaccharides must first be hydrolysed (broken down) into a monosaccharide called GLUCOSE in order to obtain energy for the body.
What is the counterstain in the Schaeffer-
Fulton endospore stain procedure?
Answer:
The Schaeffer–Fulton stain is a technique designed to isolate endospores by staining any present endospores green, and any other bacterial bodies red. The primary stain is malachite green, and the counterstain is safranin, which dyes any other bacterial bodies red.
A common source of acid rain is air pollution that contains sulfur. This creates sulfuric acid when it mixes with water vapor in the air. Sulfur air pollution is easy to identify because it has a rotten-egg odor. What are some sources of sulfur air pollution you have encountered?
The random movement of molecules across a cell membrane, from the side of the membrane where the molecules are in high concentration to the side of the membrane where the molecules are in low concentration (that is, high-to-low movement), without the use of any extra energy source, is
called
Answer:
the answer for this is Osmosis.
Explain why the arrangement of water molecules is different in ice and water.
Answer:
Because the ice is in solid state and water in liquid state
a hiatal hernia is a weakness in the ____muscle, which allows a portion of the digestive tract to enter the thoracic cavity.
in what way are photosynthesis and cellular respiration similar
Answer: The two processes are similar in that they both produce energy, albeit in two different forms. ... The win-win of the two processes is that they both provide each other with the necessary ingredients for the process to take place: glucose and oxygen for cellular respiration, carbon dioxide, and water for photosynthesis.
I hope this helps! Good luck with your future homework and exams! <3
Answer:
Photosynthesis and cellular respiration are similar because they both produce energy and involved in exchange of gases.
Explanation:
Hope this work :)
Optimal foraging theory suggests that:__________
a. when search time is long relative to handling time, predators should be generalists.
b. when handling time is long relative to search time, predators should be generalists.
c. new items are added to the diet only if their handling time is larger than average.
d. specialized diets are rare in nature.e.none of the above
Answer:
a. when search time is long relative to handling time, predators should be generalists.
Explanation:
In behavioral ecology, the optimal foraging theory can be used to predict animal behavior related to the search for food. Animals need to take different foraging approaches in order to obtain better energy cost benefits. This theory proposes that natural selection chose animals that maximize their adaptive fitness by adopting the better (economically effective) foraging pattern according to its environment. Moreover, animals are regarded as generalists when they are capable of surviving in many different habitat conditions and/or eat different types of foods (omnivores are generally generalist species). In this case, predators with large search times don't have time to choose between different prey, thereby they will be generalists.
which two are the most similar?
A: comets and asteroids
B:comets and meteorites C:asteroids and meteoroids
D: asteroids and meteorites
Answer:
C.Astroids and meteoroids
A molecule that enters the body from an external source and alters its normal functions is a(an) A molecule that enters the body from an external source and alters its normal functions is a(an) agonist. drug. antagonist. steroid. hormone.
Answer:
Antagonist
Explanation:
Antagonist refers to molecule that enter the body and block actions. They are like ligands that attache to receptors but don't activate the receptors. But the decrease or reduce the biological activities or actions of other drugs in the body. They block biological functions , hence they are refer to as blockers.
This scientist spent his/her early adult work recording folk songs in southwestern Virginia, but then went on to propose that gene expression changes influenced how cells developed.
a. Eric H. Davidson
b. Eric Carroll
c. Isabelle S. Peter
d. Jennifer Doudna
Answer:
a. Eric H. Davidson
Explanation:
Eric H. Davidson was a developmental biologist whose work helped to understand gene regulation networks in an evolutionary context, being a pioneer in understanding embryogenesis at the genome level. He especially studied sea urchin development, a model animal for developmental biology and genomics. He focused on the animal's nucleic acid properties through the process of hybridization (which has enabled us to understand molecular interactions during development as a whole system), shedding light on the molecular basis of sea urchin development. Eric H. Davidson also compiled the first list of 'fully sequenced' sea urchin genes, involving especially transcription factors, and their interactions with cis-regulatory sequences.
Answer:
a. Eric H. Davidson
Explanation:
Davidson, a developmental biologist, was a pioneer researcher and theorist of the gene regulatory networks that perform complex biological processes, such as the transformation of a single-celled egg into a complex organism. His work helped to reveal how the DNA sequences inherited in the genome are used to initiate and drive forward the sequence of steps that result in development.
Which of the following is a problem that communities must solve in order to
protect the health of their members?
A. Production of wastes
B. Wasting of time
C. Need for recreation
D. Need for entertainment
Translation is the process during which A.mRNA is created in the nucleus B. Glucose molecules are made C. mRNA is decided to form a protein D. Lipids are synthesized ?
Answer:
C
Explanation:
translation is the formation of amino acids
Why is it important to collect data within a range of similar time periods?
Answer: to make sure that your getting all the right information for your needs
Explanation:
Which of the following observations can be explained by plate tectonics?
PLEASEEE HELPP
Continental crust is tertiary crust, formed at subduction zones through recycling of subducted secondary (oceanic) crust. The average age of the current Earth's continental crust has been estimated to be about 2.0 billion years. Most crustal rocks formed before 2.5 billion years ago are located in cratons.
please make me brainlist answer
The one that is explained by plate tectonics is shape and size of rock formation in caves. The correct option is C.
What is plate tectonics?Plate tectonics is the widely accepted scientific theory that the Earth's lithosphere is made up of a number of large tectonic plates that have been slowly moving since approximately 3.4 billion years ago.
Cooler parts of the Earth's crust were pulled downwards into the warmer upper mantle around 4 billion years ago, damaging and weakening the surrounding crust.
According to the authors, the process repeated itself until the weak areas formed plate boundaries.
A mass movement of the bedrock creates tectonic caves. The rocks separate along joints or fractures and are mechanically pulled apart.
The resulting cave is typically a high, narrow fissure with nearly planar walls and matching patterns on both sides of the passage.
Thus, the correct option is C.
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How can a mutation result in a new trait (as seen with the Scottish Fold cats)?
Variations in an organism's genome that modify the activity of genes or the function of proteins can give rise to new characteristics in that organism.
What are scottish fold cats?Different phenotypes can be introduced into an organism by genetic changes that change gene activity or protein function.
A domestic cat breed known as the Scottish Fold has a naturally occurring dominant gene mutation that affects cartilage throughout the body and causes the ears to "fold," bending forward and downward toward the front of the head, giving the cat what is frequently referred to as an "owl-like" appearance.
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