How is the proportion of hydrogen to helium in the Sun's core changing over time?

Answer: The percentage of the helium will increase with the decrease in the percentage of the hydrogen.

Explanation:

The conversion of the hydrogen into helium occurs by the nuclear fusion of the hydrogen atoms. This process reduces the hydrogen density and reduces the energy production inside the core region. Typically, in the core region of the hydrogen is converted into the helium by nuclear fusion. Four hydrogen atoms are collectively fuse to form one atom of helium. This process involves the production of heat energy.

what kind of cell has many orgins of replication

Buttermilk, yogurt, cottage cheese, and alcohol are some of the foods that are produced by bacteria performing the process of -

According to Darwin, "Organisms produce more offspring_____”
A. than will survive to reproduce
B.than plants do
C. because they want to
D. None are correct

An increased cardiac output will provide more oxygen and more glucose to the working muscles.
Explain how this helps the athlete during exercise.

large blooms of algae on the surface of a lake keep which abiotic factor from reaching the bottom?

Read this paragraph from the passage “True or False: Can You Trust Your Memory?”:

“In my view, the similarities [in memory brain activity] outweigh the differences,” adds McDermott. “It’s really not possible at this point in time to reliably distinguish between real and false memories.”

Now read the paragraph below from “The Mind in the Machine.” As you read, think about how the information in the two paragraphs relate to one another. Which sentence from the text supports that artificial intelligence likely would have trouble distinguishing a true memory from a false memory?


a. The human brain has always been an important source of inspiration for computer scientists.

b. It’s the best example we have of an intelligence machine.

c. This approach roughly mimics the way the brain processes information.

d. Recently, AI has taken huge steps forward thanks to a technique called deep learning.

What are some terms that describe cells that fight infections? Check all that apply
White blood cells
Red blood cells
phagocytes
B-cells
pathogens

Select all the correct statements concerning proteins

pls help i’m taking a test.

*
what’s a small cellular structure with a specific function

What happens to water when light is absorbed?

A. it bonds with carbon dioxide and forms carbonic acid
B. it bonds with oxygen and form H2O2
C. it splits and oxygen is given off, while H+ builds up in the thylakoid space
D. it heats up and therefore provides the activation energy needed to start photosynthesis

In the deep ocean layer, the temperature and salinity of the water is

options to anwser
the same
continues to decrease rapidly

ill give brainliest JUST HELP ME PLEASE its due tmr, please be accurate

(NEED ASAP!) how does crossing over during meiosis allow for genetic variablity?

Two black guinea pigs were crossed and they produced a litter of 4 black and 3 white guinea pigs. Which best explains this occurrence?
White fur is dominant to black fur.
White fur was the result of a mutation.
Both parents were heterozygous for black fur.

Which of the following statements regarding plant speciation is correct?

Animals adapt to their surroundings to improve reproduction rates.
Animals adapt to their surroundings to improve survival rates.
Animals adapt to their surroundings to reduce reproduction rates.
Animals adapt to their surroundings to reduce survival rates.

Pattipan squash are either white or yellow. In growing Pattipans, you notice that if you want to get yellow Pattipans at least one of the parents must be yellow. Which color is dominant?
Explain.

Which of the following pairs is unrelated?
O Sugar-carbohydrate
O Fat-lipid
O Amino acid-protein
O Starch-nucleic acid

What is one reason that pumpkins are more closely related to corn plants than to edible mushrooms?

part of earth that contains all ecosystems

help please asap...
2 pagessss
will mark brainliest if right

1. A mixture is a blend of two or more substances that have NOT
A. combined chemically
B. dissolved
C. been mixed together


Please answer as soon as possible !!

Margaret has detached earlobes (a) , which is a recessive trait. If she wanted ALL of her children to have attached ears (A), what type of man would she need to marry in order to give her the best chances?

A. A man with the genotype AA

B. A man with the genotype aa

C. A man with lobed ears like hers

D. A man with the genotype Aa

Energy and mass is the square of its speed. True or false

What is not a following factor influencing natural selection

How can climate change be reduced? How can climate change be fixed? Is there any evidence for us to see that climate change has been affecting us?

PLEASE HELP DUE TOMORROW!

what are the advantages of harvesting more crops and trees to reducing carbon emissions?

And what are disadvantages of harvesting tree and crops for reducing carbon emissions?

Sacculina carcini is a barnacle that attaches to the underside of the green crab. The barnacle finds a hole in the
green crab's exoskeleton, then uses microscopic hairs to feed on nutrients from the green crab's blood. The barnacle also lays its eggs in the green crab reproductive system, which sterilizes the green crab.
Which term describes the role of S. carcini in this relationship?
a.prey
b.host
c.parasite
d.predator
pls help!!

Negative feedback: If blood pressure is high, the blood vessels should
A. dilate (open up more)
B. constrict (get tighter)​

please help, will give brainliest ​

A female heterozygous for dark hair and freckles married a male also heterozygous for dark hair and freckles. What is the possibility of having offspring with no freckles and light hair?

•8/16
•3/16
•9/16
•1/16