What is the result if nucleotides pair incorrectly?
a mutation
cell death
chromosome duplication
a new type of gene

Answer:

a mutation

Explanation:

Wrong nucleotide pair can cause mutation. If mistake is not fixed, it could cause cell death eventually.

Fresh Water biomes include:

seas

lakes

rivers

fjords

swamps

bays

ponds

In preparing a karyotype, a blood sample is centrifuged. The reason for using this device is to
A.
make sure the blood cells are alive
B.
allow the cells to rest before using them again
C.
break up the cells and separate it into parts
D.
smash all of the chromosomes in the cells

If you don't know this don't answer I NEED this correct

Approximately what percentage of human energy requirements is currently produced with fossil fuels?
A. 100 percent
B. 80 percent
C. 0 percent
D. 20 percent

Which statement best explains why cells differentiate in multicellular organisms?
O Cells differentiate to form cells with different DNA that perform different functions.
O Cells differentiate to form specialized cells that make up tissues and organs.
O Cells differentiate to form the cells necessary for reproduction.
O Cells differentiate to create proteins and fat.

Constructed Response: Identify & describe 2 ways removing trees from a forest can affect the organisms who live there. Using the vocabulary words: Organisms, populations, communities, ecosystems, abiotic factors, and biotic factors.

What can you infer are factors that caused the difference in the rates of weathering?
need

At some point in the past, the bones in the fins of a population of fish become largedr and larger. The bones become able to support the weight of the organisms when they were out of water. What other changes over time would be needed for fish to live out the water?

Are all human cells capable of mitosis and cell division? How does this affect the body's ability to repair itself? Support your answer with specific examples. answer in at least 4 sentences
(THIS HAS NOTHING TO DO WITH THE REPRODUCTION!!!!!!!)

Which kind of image can never be projected and forms where light rays appear to originate?

virtual
real
inverted
enlarged

There are 2 types of worms: worms that eat at night (nocturnal) and
worms that eat during the day (diurnal). The birds eat during the day and seem to be eating ONLY the diurnal worms. The nocturnal worms are in their burrows during this time. Each spring when the worms
reproduce, they have about 500 babies but only 100 of these 500 ever become old enough to reproduce.
Identify a type of variation in the worms.
______________________________________________________
Which variation is most favorable? _______________________________________________________ In 50 years, what will natural selection have most likely done for the worms? _________________________________________________________________________________ What adaptations might occur in the birds in 100 years? ______________________________________ ________________________________________________________________________________________

Are all human cells capable of mitosis and cell division? How does this affect the body's ability to repair itself? Support your answer with specific examples. at least 3 sentences please i am desperate i will give brainliest

(This is not about reproduction)

I'm stuck on this problem

What are coronary arteries? What are their function? How are they involved in heart disease?

According to this diagram, which number most closely represents the process of photosynthesis?


1


2


5


6

Consider the following data about populations of red squirrels, gray squirrels, and foxes. Two students looked at the data about how the red squirrel populations changed over time. Each made a claim about a cause-and-effect relationship. Student A: I think an increase of the fox population caused the red squirrel population to decline. Student B: I think an increase of the gray squirrel population caused the red squirrel population to decline. Which student do you agree with most? _____ Describe the evidence that supports this claim.

Above a horizontal line running through the center of a double concave lens, a large car to the left of a double concave lens and a small car to the right. On the line at the front of the large car a point labeled Focal point. On the line to the right of the small car a point labeled Focal point. A dotted line 2 goes from the left focal point up and right through the center top of the lens and then solid to a label 2. A straight line goes from the top of the car straight to the center of the lens. A solid line goes from through the lens, becomes dotted, and goes to the right Focal point. A solid line goes down and right from the top of the car through the center of the lens to a label 1 below the right Focal point. A straight dotted line starts at the intersection of 1 and 2, becomes solid in the center of the lens, and goes to a label 3.
Which best explains how to correct Akio’s mistake?

Change the lens so it appears convex instead of concave.
Move the small car so it appears on the left side of the lens.
Make the small car much larger than the other car.

Do someone know this?

Item 5
What is the process the human urinary system uses to filter waste from the blood, store it and then get rid of it?

Choose all correct answers.


Waste and water from the blood are filtered in the kidneys, producing urine.

When the bladder gets full, urine exits the body through the urethra.

Urine flows through the ureter tubes and is stored in the urethra.

The blood transports urea, old cells, excess salt, and unwanted water to the bladder.

Identify two ways in which scientists know the physical characteristics of organisms change over time.

Which two statements describe advantages of genetically engineered crops?
A. Crops that are harmful to insect pests can also decrease
populations of helpful insects.
B. Crops can be engineered to have traits that give them better food
quality.
C. Crops can be grown without using chemical pesticides if they are
resistant to insect pests.
D. Pollen that spreads from crop plants to closely related wild plants
can destroy wild populations.

Biodiversity
Evidence
What it tells us?
1. fossils of organisms no longer alive today


2. features that are shared by more than one species


3. the extinction of many fossil species at the same time


4. the extinction of one group of organism, like corals, on which other organisms depend

(This is due today!)


Which hamsters are the parents of the mystery hamster? Include evidence to prove that they are the correct parents.

Paleoecology
Evidence
What it tells us?
8l no


2. shapes of leaf edges


3. tooth marks in fossil shells


4. fossil pollen

In which situation would a mutation be passed from parent to offspring?
When the mutation is in a sperm cell.
When the mutation is in a skin cell.
When the mutation is in a muscle cell.
When the mutation is in a bone cell.

What type of weathering would occur in a location with an average temperature of 15 degrees Celsius and precipitation of about 200 cm per year.

PLS ANSWER

if my weight is 64.7. does it mean I am overweight or healthy or obese or other?
pls just need a simple explanation and answer

please hlep me!!!!!!!!!!!!!!EEEEEEEEEEE!!!!!!!!!!!!EEEEEEEE

The pedigree diagram shows how a dominant trait is
inherited in a family. Each colored shape represents a
person with the trait.
Which conclusion is supported by the pedigree diagram?

How are mutations passed on to offspring?

A mutation is passed on when it occurs in a stomach cell.

A mutation is passed on when it occurs in a brain cell.

A mutation is passed on when it occurs in a nerve cell.

A mutation is passed on when it occurs in an egg cell.