1. Why does the immune system make memory cells?

2. Plants follow a reproduction pattern called alternate generations. Explain the two processes in alternate generations.

3. Describe the difference between sexual and asexual reproduction. Give at least one example organism for each type.

4. Many of your body’s responses operate off of either negative or positive feedback loops. When you are cold, you shiver. Explain why that happens.

Answers

Answer 1

But cells in our immune system can remember old foes just fine, and we've never really been sure exactly how they manage it. A new study has filled in missing details on the steps our body takes to remember pathogens, finally revealing the steps our immune cells take to preserve a reference library of past battles.


Related Questions

A bar graph titled Global Trade (Percent of G D P). The x-axis is labeled Year from 1988 to 2013. The y-axis is labeled Percent of G D P from 0 to 70. 1988 and 1993 were under 40 percent. 1998 and 2003 were over 40 percent. 2008 and 2013 were almost 60 percent. Which statement is supported by information in the graph? Trade between nations steadily decreased between 1988 and 2013. Trade between nations steadily increased between 1988 and 2013. Trade between nations increased between 1988 and 2003, and then decreased. Trade between nations decreased between 1988 and 2003, and then increased.

Answers

Answer:

B

have a nice day luv u <3

The statement which is supported by the information in the bar graph is that: B. trade between nations steadily increased between 1988 and 2013.

What is a bar graph?

A bar graph can be defined as a type of chart that is used to graphically represent data (information), especially by using rectangular bars or vertical columns.

Based on this bar graph titled Global Trade (Percent of GDP), we can infer and logically conclude that trade between nations increased steadily between 1988 and 2013, which was from over 40 percent (40%) to almost 60 percent (60%).

Read more on bar graph here: https://brainly.com/question/24741444

#SPJ2

What did Gregor Mendel use to discover the principles that rule heredity?
A. Pigeons

B. Pear Trees

C. Dogs

D. Pea Plants

Answers

Answer:

D. Pea Plants

Explanation:

The answer is d pea plants

United States has historically imported much more oil than it produces. Recently,
however, there has been a movement to further increase local oil drilling. Which
of the following would be a negative effect of increased drilling for oil?
O A. Increased population near drilling sites will cause an increase in the
national crime rate.
O B. Increased drilling may lower the cost of oil-based products and fuels.
OC. An increase in oil drilling would increase the risk of pollution.

Answers

Answer:an increase in oil drilling would increase the risk of pollution.

Explanation:

took the test 100 on it ‍♂️

Compare and contrast a fossil and a trilobite.(1 point)


A (Both fossils and trilobites are relativity new, both being around 1,000 years old. However, fossils are only found under water, whereas trilobites are found all over the globe.


B (Both fossils and trilobites are relativity new, both being around 1,000 years old. However, trilobites are only found on the bottom of the ocean, whereas fossils are found only on land.


C (Both fossils and trilobites are extremely old. However, a fossil was a creature that was living on Earth at some point that over time turned into a trilobite, meaning a fossil is one type of many different types of creatures found in trilobites.


D (Both fossils and trilobites are extremely old. However, a trilobite was a creature that was living on Earth at some point that over time turned into a fossil, meaning a trilobite is one type of many different types of creatures found in fossils.

NO FILES

Answers

Answer:

D. Both fossils and trilobites are extremely old. However, a trilobite was a creature that was living on Earth at some point that over time turned into a fossil, meaning a trilobite is one type of many different types of creatures found in fossils.

Both fossils and trilobites are extremely old. However, a trilobite was a creature that was living on Earth at some point that over time turned into a fossil, meaning a trilobite is one type of many different types of creatures found in fossils. So, the correct option is D.

What do you mean by Fossil?

Fossils are the preserved remains of the organisms whose bodies were buried in the sediments, such as sedimentary rocks.

Trilobite is a member of a group of extinct fossil arthropods easily recognized by their distinctive three-lobed and three-segment forms. It is exclusively a marine animal. It first appeared at the beginning of the Cambrian period.

Therefore, option (d) significantly compares and contrasts a fossil and a trilobite.

To learn more about Fossils, refer to the link:

https://brainly.com/question/11224681

What are the weather conditions in an area of low pressure?


Dry weather

Sunny weather

Cloudy with precipitation

Answers

Answer:  Cloudy with Precipitation

Explanation: Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.

The Vertebrata have the least number of species in it. True or false

Answers

Answer:

False

hope it is helpful to you

URGENT!!!!!!!!-What is the carrying capacity of the graph?
OPTIONS:
4
6
13
20

Answers

Answer:

13

Explanation:

The carrying capacity is maximum amount of yeast that can exist in the environment, and the graph seems to table out at the 13 value.

RD
In which nutrient group would you find sugary sweets?
ме
A
fat
B
water
С
protein
D
carbohydrates

Answers

Answer:

D

Carbohydrates

Explanation:

Hope it helps

In Figure 30-4, which structure represents unsaturated fat? Which structure represents saturated fat? At room temperature, what state is each type of fat?
State whether each type of fat is associated with heart problems. Give an example of each type of fat.

Answers

The structure on the right is saturated while the structure on the left is unsaturated (presence of double bond). At room temperature the saturated fat will be solid and the unsaturated fat will be liquid.

High consumption levels of saturated fats are associated with heart problems. Consumption of high levels of saturated fats can raise your cholesterol levels and increase risk of heart disease.

Unsaturated fats are not associated with heart problems.

An example of saturated fat would be the fat found on red meat. An example of unsaturated fat would be the fat found in nuts, avocados, etc.

HELP PLEASEEEEEEEEEE

Answers

1.) salivary glands
2.) your mouth is lined with tissues called mucous membranes
3.) hell keep your mouth moist. help break down food. salivary glands make it easier for you to swallow food.

Question 10

What is missing from this food chain?

Grass > Grasshopper > Bird > Snake

A. Producer
B. Primary consumer
C. Secondary consumer
D. Decomposer

Answers

Answer:

D

Explanation:

In any food chain, the decomposers are an essential part, to decompose any dead thing. They don't go on the bottom or top, they are sorta to the side but are definitely on that chain.

What happens to waste before it is passed out of the body???

Answers

Answer:

It goes through a series of "Events" I'll talk you through them lol.

Explanation:

See, when you eat something it goes down the esophagus and into the stomach, then to your small and large intestine. While it slowly travels through your intestines, your body is slowly taking the nutrients from that piece of food, which makes the food turn into a different color, since all the nutrients is taken out of the food, then the body no longer needs that food. Then it disposes from the body!

Hope this helped!

:3

Which describes an atom that has fewer neutrons than protons and more electrons than protons?

Answers

Answer:

An atom that has fewer neutrons than protons and more electrons than protons is an anion.

THIS IS ALSO PAST DUE PLEASE ANYONE HELP
Explain how limiting growth is advantageous for the goldfish’s survival in a home aquarium

Answers

The goldfish is a pet. In a home it is in a secure taken care of aquarium and will only grow to fit the size of the aquarium it is in.

Organisms are classified as producers or consumers according to the way they

A. obtain energy
b. Release wastes
c. Produce offspring
d. move from place to place

Answers

Answer:

A.

Explanation:

what is a genomic change based on definition?

Answers

Answer:

Genome size can increase by duplication, insertion, or polyploidization. Recombination can lead to both DNA loss or gain. Genomes can also shrink because of deletions. ... It is beneficial to an organism to rid itself of non-essential genes because it makes replicating its DNA much faster and requires less energy.

Explanation:

The study of genes and their function. Genomics aims to understand the structure of the genome, including the mapping genes and sequencing the DNA

In horses, black coloring (B) is dominant, and chestnut coloring (b) is recessive. What percentage of offspring are expected to be chestnut?

Answers

Answer:

This question is incomplete, the complete question is as follows:

- In horses, black coloring (B) is dominant, and chestnut coloring (b) is recessive. A homzygous black horse crosses with a chestnut horse.

What percentage of offspring are expected to be chestnut?

The answer is 0%

Explanation:

This question involves a gene coding for color in horses. The allele for black coloring (B) is dominant over the allele for chestnut coloring (b) is recessive.

According to this question, if a homzygous black horse (BB) crosses with a chestnut horse (bb), the following gamete will be produced by each parent;

BB - B only

bb - b only

Using these gametes in a punnet square, the following proportion of offsprings will be produced:

Bb, Bb, Bb, Bb

All of these offsprings are phenotypically black colored although heterozygous in genotype. Hence, 0%  of offspring are expected to be chestnut.

Answer:

its 0% love

Explanation:

what particle travels in an electromagnetic wave?
proton
electron
neutron
photon

Answers

Answer:

Electrons and protons.

Answer:

I believe it's photon.

Explanation:

The wave-particle theory.

I hope it's right! If not, I tried, so so sorry.

Is anaphase II similar to anaphase in mitosis?

A. Yes

B. No

Answers

Answer:

A

Explanation:

Which factors contribute to changing igneous and sedimentary rocks into metamorphic rocks?
weathering
erosion
heat
deposition
pressure

Answers

The answers are heat and pressure

Answer:

Pressure and Heat.

Explanation:

What time of year does everywhere on Earth receive an (almost) equal amount of daytime sunlight? Why does this occur?

Answers

Answer:

September Equinox

Explanation:

it occurs when the sun crosses the celestial equator from north to south

What are the three parts of modern cell theory. Choose all that apply.



A.) The cell is the smallest living unit in organisms


B.) All cells come from other pre-existing cells


C.) All living things are made of cells


D.) All organisms are multicellular

Answers

Answer:C.) All living things are made of cellsExplanation:

I need help in writing an essay about the rise of global temperatures over the past century

Answers

Answer:

Essay about the rise of global temperatures over the past century.

Explanation:

The rise of global temperatures over the past century is the major issue which occurs due to human activities. The use of fossil fuels in vehicles releases huge amount of carbondioxide gas in the air while burning. Carbondioxide gas is a green house gas which blocks the reflected solar radiation to go away in the space. These solar radiation remains in the surface which increases the surface temperature of the earth. This rising in the surface temperature is responsible for the melting of glaciers that leads to the rise of sea level which is a threat for coastal regions. This melting of glaciers also causes floods in the regions so that's why the it is a major issue.

sawarasenaikimiwa⛓shoujonano?✨böKùWâÿARiçHiñBįCChīńOoSûDàYO

Answers

this this a different language? I don’t understand

heh touch you song by Yarichin b*tch Club

How are humans causing a decrease in species richness in certain environments?

Answers

Answer:

by being wasteful

Explanation:

Answer:

we use things we don't need to or misuse things we shouldn't? hoomans r bad

Explanation:

can someone explain it or maybe give me the answer, im desperate :)

Answers

What’s the strand for this question?

Which of the following are functions of
enzymes?

Answers

Answer:

The function of an enzyme is to speed up a chemical reaction in a living thing (humans, animals, plants etc.)

why are owls considered keystone predator

Answers

Explanation:

Keystone species are animals that help manage other animal species by controlling population numbers and biodiversity within an ecosystem. The impacts of keystone species are usually greater than their numbers. 

owls can be a great benefit to places where rodent populations are high. Dense urban areas often suffer from an abundance of rats and mice spreading disease, and rural agricultural communities have their crops consumed and soil eroded from burrowing voles and field mice. Without owls, and other top predators, rodent populations could explode and exacerbate the effects they produce.

Answer:

the owl is a keystone species, as many other birds. and it gives them the nutrients they need when they eat the bird and it mangeges the population of the other species:)

Why don’t spinal or brain injuries often not heal?

Answers

Those are very fragile. It also depends on how bad of injury. There are tiny little bone that are sometimes hard to see.

Which of the following statements for artificial selection are true?

A).Artificial selection is the intentional breeding of organisms for desirable traits
B).Artificial selection can only be seen in animals
C).Artificial selection is the breeding of plants and animals without interference
D).Artificial selection can only be seen in plants

Answers

Answer:

A) Artificial selection is the intentional breeding of organisms for desirable traits.

Other Questions
HELP ASAP I NEED HELP WITH MY MATH HW (7.1) The United States entered World War II immediately after Gabriel servers 80 glasses for fruit juice for a party. He pours 2/3 cup of fruit juice into each glass. How many cups of fruit juice in fractions does Gabriel pour in all? !!!!!!Please help ASAP!!!!!AB and BC form a right angle at their point of intersection, B. If the coordinates of A and Bare (14, -1) and (2, 1), respectively, the y-intercept of AB is 4/3 and the equation of BC is y= 6 X + If the y-coordinate of point Cis 13, its x-coordinate is Simplify (-32) divided by (-4) A bracelet is now reduced to 600. This is 80% of the original price.a) Work out the original price of the bracelet. Which of the following developments helped bring about the Industrial Revolution?A the overproduction of consumer goodsB the lowered demand for manufactured goodsC the decrease in the amount of overseas tradeD the increase in the size of cities and populations please help asap!thanks Based on the details in Passage 1. whichinference can be made about the speakerof the poem?The speaker prefers daffodils to other typesof flowers.The speaker enjoys watching clouds.The speaker was alone when viewing thedaffodils.The speaker often walked the routedescribed Which function is represented by the graph below?graph begins in the second quadrant near the x-axis and increases slowly while crossing the ordered pair 3, 1. Then the graph begins to increase quickly throughout the graph(5 points)f(x) = 3xf(x) = 3x 3f(x) = 3x + 3f(x) = 3(x 3) Select at the tru statements about this graph 240 g of water (specific heat = 4.186 J/gC, initial temperature = 20C) is mixed with anunknown mass of iron (specific heat = 0.444 J/gC, initial temperature 500C). Whenequilibrium is reached, the system has a temperature of 42. Find the mass of iron. HELP What is the equation of the trend line in the scatter plot ? 4. When a key on piano is pressed, a sound is heard. What produces this sound?A. the vibrating key of the pianoB.The Vibrating String Of PianoC. the finger pressing the piano keyD. the air molecules inside the piano Which one of the following is NOT one of the two most abundant and common elements in the universe?HeliumHydrogenPlutonium pleaseeeeeeee helpppppppp Which of the following media representatives would most likely meet with a celebrity fashion designer to preview her Fall collection in July?the art director of an online fashion magazinethe advertising chief of a celebrity gossip magazinethe editor-in-chief of an international fashion magazinethe author of a fashion blog Help me - prime factorization of 136 13 - [(3 x 4) - 30] 1. Based on the information given, what is the Worthington Family's net worth? Will they qualify for the loan?1Net worth:Will they qualify for the loan? (yes or no) True or FalseThe bombing of Pearl Harbor got the U.S. involved in WWII?