Answer:What is an antigen?
a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
Why is it important to match blood types when giving a blood transfusion?
The accurate grouping of blood is very important when it comes to having a blood transfusion. If blood is given to a patient that has a blood type that is incompatible with the blood type of the blood that the patient receives, it can cause intravenous clumping in the patient's blood which can be fatal.
Why are people with type O blood called "universal donors"?
Type O-negative blood does not have any antigens. It is called the "universal donor" type because it is compatible with any blood type. ... Minor antigens (other than A, B, and Rh) that occur on red blood cells can sometimes also cause problems. So they are also checked for a match before giving a blood transfusion.
Who are universal recipients? Why?
Type AB-positive blood is called the "universal recipient" type because a person who has it can receive blood of any type. Although "universal donor" and "universal recipient" types may be used to classify blood in an emergency, blood type tests are always done to prevent transfusion reactions.
Explanation:
hope it the right answer and it help you
pattern of lines that intersect maps
Answer:
Grid
Explanation:
49. A test for starch in variegated leaves shows the importance of
A. sunlight
C. water
B. oxygen
D. chlorophyll
Answer:
D. Chlorophyll
Explanation:
Chlorophyll is important as it allows the plant to convert carbon dioxide and water into glucose.
A Endometriosis is a condition that occurs in some women , causing multiple cells or layers of cells to grow outside of the uterus. In some cases , these growths can actually cover the entire ovary or cause the tube leading from the ovary to the uterus to be blocked. The diagram represents the female reproductive system . structures , A and B are labeled Zoom Select structure A or B and indicate your selection . Describe specifically how the growths that are characteristic of endometriosis at the location you selected affect the ability of a female to become pregnant
Answer:
sorry bro i need points
Explanation:
sorry sorry sorry
When might self-fertilization be beneficial for a plant? When there are too many dioecious individuals in a population, self-fertilization becomes beneficial for a monoecious individual. When environmental conditions are harsh, such as a plant growing in nutrient-poor conditions, or when herbivores have damaged the plant, plants may self fertilize. When environmental conditions are perfect, plants can afford to self-fertilize. Only plants with perfect flowers are capable of self-fertilization.
Answer:
Only plants with perfect flowers are capable of self-fertilization.
Explanation:
Self-pollination is the process that allows plants to fertilize themselves. This process is very beneficial when a plantation has plants with few flowers or when the plants are spaced far apart.
However, only plants with perfect flowers can self-fertilize. This is because for self-fertilization to occur, the plant needs to have flowers that present the male and female reproductive organs, which allows the same flower to produce pollen that will be sent to its own ovary. Only perfect flowers have male and female reproductive organs at the same time.
Question 16
Which statement regarding succession is NOT true?
Succession is a sequence of changes in the species composition of an ecosystem
1 Secondary succession occurs when one community of organism replaces another
2 Succession that occurs after a volcanic explosion would be followed by primary succession
O A forest fire that destroys an ecosystem would be followed by primary succession
Answer:
adsf
Explanation:
afsd
1) List three properties of rocks.
Answer:
three properties of rocks are;
they are hardthey have shape and sizethey have different texture.Answer:
Their shapes vary
They are hard
They have different textures
Explanation:
Hope it helps
Have a great day :)
Drag each label to the correct location on the table.
Sort the examples into proper mechanisms of reproductive isolation. PLEASE HURRY! THIS IS TIMED AND I WILL MARK BRAINLIEST (OR HOWEVER YOU SPELL IT)!
Answer:
first one is pre second ones pes third one is pes fouth one is pre
Explanation:
ur welcome
Which is an example of a vestigial structure?
A) The flipper of a whale
B) The wings of a bird
C) The tailbone of a human
D) The eyes of a bat
Answer:
C) the tailbone of a human
Humans no longer have tails due to evolution because we don't need them. The other answers are body parts that are useful to those animals.
Hope this helps!
Entre as consequencias decorrentes do aumento da temperatura dos mares e dos oceanos, podem ser citados o derretimento das calotas polares, a diminuição no nível de oxigênio presente neles e a morte de corais. Escolha um desses exemplos e explique a relação entre ele e o aquecimento de mares e de oceanos.
Answer:
Death of coral reefs occurs due to increasing the temperature of the ocean.
Explanation:
Death of coral reefs occurs due to increasing the temperature of the sea and ocean because warm water killed the algae attached to the surface of coral reefs which causes bleaching of coral reefs. This coral reefs provides habitat as well as food to thousands of animals present in the ocean ecosystem so the destruction of coral reefs causes death or migration of animals from that region.
How are genes and proteins related?
O A. Proteins are used to build genes.
O B. Genes contain the code to make proteins.
O C. Proteins are made of parts of genes.
O D. Genes and proteins are both made of DNA.
SUBMI
Answer:
Genes contain the code that makes proteins
As well i think genes and proteins are both made of DNA
Alma is walking in a park. Suddenly, a wild dog charges towards her. Alma is frightened. The ____ starts to respond by increasing her heart rate and dilating her pupils. After running for a few minutes, Alma realizes that the dog has fallen far behind. At this point, her ____ starts working to relax her body slowing down her heart rate and constricting her pupils.
1.
A. parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
2.
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
chlorophll absorbs what colors
Answer: Violet and orange
Explanation:
They absorb light of other wavelengths with less intensity.
. When an animal is thirsty, it responds by -
eating food
drinking water
blinking rapidly
sweating excessively
eating food
drinking water
blinking rapidly
O
sweating excessively
when an animal is thirsty, it responds by drinking water
Which of the following best describes how the human nervous system and
the endocrine system work together?
O A. The nervous system signals the endocrine system to release
hormones in response to a stimulus.
O B. The nervous system responds to a stimulus, and the endocrine
system returns the body to a relaxed state.
O C. The endocrine system signals the nervous system to send out
nerve impulses in response to a stimulus.
D. The endocrine system responds to a stimulus, and the nervous
system returns the body to a relaxed state.
The nervous system usually signals the endocrine system to release hormones in response to a stimulus. The correct option is A.
What is endocrine system?The endocrine system, which is made up of all of the body's different hormones, regulates all physiological processes in the body from gestation through adulthood and to old age.
This regulation also include brain and nervous system development, reproductive system growth and function, metabolism, and blood sugar level.
The endocrine system and the nervous system collaborate to influence many aspects of human behavior, together with growth, reproduction, and metabolism. And the endocrine system is crucial in the regulation of emotions.
In response to a stimulus, the nervous system basically signals the endocrine system to release hormones.
Thus, A is the correct option.
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What phase of mitosis is shown in the diagram below?
Answer: Its A. Prohase
Explanation:
Answer:
A . it's the prophaseExplanation:
prophase is the phase of mitosis in the diagram
10 Which of the following are examples of natural selection?
SELECT ALL THAT APPLY
A Domesticated dog breeds
B Giraffes developing longer necks over time
A non-poisonous snake mimics a poisonous snake
D Breeding two racehorses that are fast and strong
E Genetically modified soybean
F Galapagos finches choosing mates with stronger and longer beaks
G Allowing only the cows that produce the most milk to reproduce
H Peppered moths choosing mates with darker colors
Answer:
B Giraffes developing longer necks over time
A non-poisonous snake mimics a poisonous snake
F Galapagos finches choosing mates with stronger and longer beaks
H Peppered moths choosing mates with darker colors
Explanation:
Hope this helps
The examples of natural selection are as follows:
Giraffes develop longer necks over time.A Non-poisonous snake mimics a poisonous snake.Galapagos finches choose mates with stronger and longer beaks.Peppered moths choose mates with darker colors.Thus, the correct options for this question are B, C, F, and H.
What is Natural selection?Natural selection may be defined as the methodology through which organisms that are better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. The concept of Natural selection was first proposed by Charles Darwin.
According to the question, due to the requirement of long necks in order to get food from longer trees, Giraffe develops longer necks. In order to protect themselves from predators, a non-poisonous snake mimics a poisonous snake.
On Galapagos island, if there were variations in the finches of the bird, they get a variety of food resources in order to get more nutrients and energy for survival and reproduction.
Therefore, the correct options for this question are B, C, F, and H.
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Which pronoun correctly completes this sentence?
Ingrid tells her friends about rugby, and _______ tell her about football.
their
them
they
themselves
Answer:
Hello,⊕ Which pronoun correctly completes this sentence?Ingrid tells her friends about rugby, and they tell her about football.
;))
Answer:
They
Explanation:
I got it right on my test
Pedigree Studies
Part A. Reading a Pedigree
Using Figure 1 answer the following questions.
1) What are the sexes of the oldest and
youngest children?
II
2) What is the relationship between 1-1 and
II-3?
1 2
3
4
Figure 1
3) Who has the trait and who does not?
4) Would you expect this pedigree to be for a trait that is dominant or recessive? Explain
your answer.
Answer:
you
Explanation: thats tuff bro
What is the complementary mRNA sequence of this DNA sequence?
DNA sequence: TAC
What are the two sensory functions of ears?
Answer:
obviously listening and hearing
Which of the following statements is
FALSE?
•Disposal of radioactive waste is easy & poselittle risks to the environment.
•Radioactive waste still emit radioactivity.
•Radioactive materials can cause mutations.
•Disposal of radioactive waste is easy & poselittle risks to the environment.
16. Which genotype represents a recessive trait? *
1 point
ee
Ee
EA
EE
Answer:
ee
Explanation:
in order for the genotype to represent a recessive trait both alleles ( letters ) have to be lowercase hence the answer is ee
Which of the statements regarding the nitrogen cycle is true? a. Denitrification occurs when a nitrogen containing compound is produced from nitrogen in the soil. b. Atmospheric nitrogen is absorbed through the leaves of plants. c. Nitrogen fixation is the process atmospheric nitrogen is converted into biologically usable forms. d. Animals obtain nitrogen through the process of cellular respiration
Answer: Option C
Explanation:
The nitrogen cycle can be defined as the process by which the nitrogen is being recycled. The nitrogen is transferred from the atmosphere to the plants and then from plants to animals, human beings.
Then from animals and human beings it is again transferred into the soil and then atmosphere.
The nitrogen that is found in the sol is not in the usable form by the plants, nitrogen fixing bacteria converts it into usable form.
As you increase the temperature, the rate of photosynthesis increases and then decreases.
True
False
Answer:
true
Explanation:
Because plants need sunlight to do photosynthesis.
Which of the following facts is the best evidence that humans and salamanders had a common ancestor?
A) Both species eat meat
B) Both species have pharyngeal arches and slits when they are embryos
C) Both species can swim
D) Both species have skin
Answer:
B
Explanation:
Look up an image of a human embryo v. a salamander embryo if you look carefully you'll see the arches and slits.
HURRY PLS. What kind of bond forms between the oxygen atoms of one water molecule
and the hydrogen atoms of another water molecule?
A. Hydrogen
B. Polar covalent
C. lonic
D. Metallic
What is the function of the stigma?
A. To catch pollen grains
B. To produce eggs
C. To attract insects
Explanation:
A. to catch pollen grains
is yr correct ans.
hope it helps
stay safe healthy and happy..Answer:
A. To catch pollen grains
Explanation:
The function of the stigma is to catch the pollen grains.
Which of the following proteins could be used in connective tissues, tendons, or hair?
Answer:The answer is B
Explanation: I did the test and it was correct
Collagen fibrous protein
option (B)
What protein is found in connective tissue?Connective tissue that provides support and framework for the body consists of fibrous proteins and nonfibrous ground substances in varying proportions depending on their functions.
Collagen, which is the most abundant protein, constitutes about one-third of all body protein.
Do proteins provide support for connective tissues?These fibers hold connective tissues together, even during the movement of the body. Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that after being stretched or compressed, it will return to its original shape.
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Which does not contribute to
genetic variation?
A. chromosome number
B. crossing
over
C. meiosis
D. random mating
D Random mating
Cuz everything else leads to the way you are variated
1. What is facial reconstruction? Why is it used?
Answer:
Facial reconstruction is when you examine the bones of your face to figure out changes to make.
