how many photosystems are there in photosynthesis?

Answers

Answer 1

Answer:

2

Explanation:

There are two kinds of photosystems: photosystem I (PSI) and photosystem II (PSII) (Fig. 3.3).

Answer 2

Answer:

Two

Explanation:


Related Questions

What is true about the motion of chromosomes during binary fission?

Chromosomes start being copied at the center of the cell. They move to the ends as replication
Occurs.

Chromosomes start being copied at the center of the cell. They remain at the center throughout the
replication process.

Chromosomes start being copied at a corner of the cell. The newly produced copy moves to the other
end

Answers

Answer:

Chromosomes start being copied at the center of the cell. They move to the ends as replication

Occurs.

Explanation:

during which phase do the chromosomes make copies of themselves so that there are two of each one?

Answers

Answer:

The beginning and majority of the time is known as Interphase. Interphase is 80% of the total cycle and is where the cell does most of the work in replicating organelles, chromosomes, and preparing to undergo Mitosis which is the actual splitting process where one cell becomes two. During Interphase there are 3 major steps, G1, S, and the G2 phase.

Explanation:

Why is ammonification an important process? (4 points)

Answers

It is important because it provides nitrogen to the soil in a manner that lets plants use nitrogen and pass it through the food chain.

Which of the following is required for the sodium-potassium pump to transport potassium ions into an animal cell?

High intracellular concentrations of potassium
High intracellular concentrations of sodium
Low intracellular concentrations of potassium
Energy from ATP

Answers

Answer: Energy from ATP

Explanation:

baby jamison was born with . this is a genetic disorder in which the lungs are clogged with large quantities of abnormally thick mucus.

Answers

Baby jamison was born with Cystic Fibrosis (CF)

River deltas are?

formed by deposition
created by seafloor spreading caused by the movement of tectonic plates
areas of infertile, rocky soil

Answers

They are formed by desposition

Which of the following is correct?
Insulin is a protein, and the monomers of
proteins are fatty acids.
Insulin is a protein, and the monomers of
proteins are nucleotides
Insulin is a protein and the monomers of
proteins are glucose,
Insulin is a protein and the monomers of
proteins are amino acid

Answers

Answer:

Insulin is a protein and the monomers of

proteins are amino acid

Explanation:

Why do you think the narrator used the term “successful mistakes” for his chromosomes?

Answers

His chromosomes were successful because they ultimately ended up forming a full human being.

Review this scenario. Rainbow trout are a freshwater fish native to streams and lakes along the western coast of North America. While studying streams in the eastern United States, an ecologist noticed that rainbow trout were abundant in the ecosystem, but other native species of fish were almost entirely missing. She also observed lower populations of macroinvertebrates. The ecologist wondered why there were so few native fish species and macroinvertebrates. By reading ecological reports of the area, the scientist learned that rainbow trout had been introduced to the streams for sport fishers to catch. Initially, 100 fish had been introduced, but the ecologist conducted a field survey and estimated that over 1,000 rainbow trout now lived in the streams. She also read from other studies that rainbow trout feed primarily on macroinvertebrates. Which question most closely relates to the ecologist's observations and the collected scientific data on river ecosystems? Do the native fish species have a disease? Are rainbow trout displacing native species by outcompeting them for food? Did pollution kill off the native fish species? Why are there so many rainbow trout in the streams?

Answers

The question that best relates to the ecologist's observations and the scientific data collected on river ecosystems is:

Is rainbow trout crowding out native species by competing with them for food?

The previous question that the ecologist very possibly must ask is due to the overabundance of rainbow trout and the very low number of native species.

In order for rainbow trout to adapt and reproduce quickly, it has had to feed on macroinvertebrate species, affecting the native fauna of this ecosystem and causing the displacement of other native species and even death due to lack of food.

You can find more information in this link:

https://brainly.com/question/9718639

what happens when air masses of different temperatures meet?

Answers

Answer: When two air masses meet together, the boundary between the two is called a weather front. At a front, the two air masses have different densities, based on temperature, and do not easily mix. ... Winds are common at a front. The greater the temperature difference between the two air masses, the stronger the winds will be.

Explanation:

the vacuoles in plant cells are different from the vacuoles in animal cells because

Answers

Answer:

Explanation:

The vacuole in a plant cell is differerent from vacuoles in an animal cell because an animal cell has multiple small vacuoles while a plant cell has one large central vacuole that mainly just stores water and nutrients.

Fill in the Blank: Write the word that best completes each sentence..
17. Unlike animal cells, plant cells have
vacuoles, and a
wall.
cells have membrane-
18. Prokaryotic and Eukaryotic cells differ in that
bound organelles, and
cells do not have a nucleus.
19. Cell membranes are made up of a phospholipid bilayer. Which part of the phospholipid
bilayer interacts with water? Which part does not interact with water?
20. Name the three main parts of the modern cell theory.
1-
2-
3-

Answers

Answer:

Explanation:

1. Unlike animal cells, plant cells have vacuoles, and a cell wall

2. Cell membranes are made up of a phospholipid bilayer. Which part of the phospholipid bilayer interacts with water? Which part does not interact with water?    nonpolar fatty acid tails.                                                                                

3. first, that DNA is passed between some cells during cell division; second, that the cells of all organisms within a similar species are mostly the same, both structurally and chemically; and finally, that energy flow occurs within



what’s the correct choice?


help pls


bio


Answers

Answer:

ig (to the genotype of an individual with a recessive phenotype) but in general its done to find the genotype of individual and check whether they are dominant or recessive

Answer:

i think first option please follow me we should help each other

which rna type is the most abundant in mammalian cells?

Answers

ribosomal ribonucleic acid

How will you survive without land

Answers

Answer:

get coconut in tree make a boat with wood and your ready ro getbout

How does Dinosaur and dragon go into extinction​

Answers

Answer:

they were hit by a astroid

Explanation:

how many elements are in CH4how many elements are in CH4 ​

Answers

Answer:

Two.

Explanation:

Carbon and Hydrogen.

which amino acid is chemically modified to form a key component of the connective tissue protein collagen?

Answers

Answer:

glycine and proline

Explanation:

First, a three-dimensional stranded structure is assembled, with the amino acids glycine and proline as its principal components. This is not yet collagen but its precursor, procollagen. Procollagen is then modified by the addition of hydroxyl groups to the amino acids proline and lysine.

boom.

Which argument supports that humans and other animals depend on plants for survival?

Answers

Answer:

Animals are totally dependent on plants. First of all plants produce oxygen which is vital for life on earth. Then, for many animals plants are their basic food, or if plants don’t make up 100 % of their diet, plants are nevertheless essential in their food supply. Plants are also used by animals (and men) as material for building nests (and or homes). Carnivorous animals eat animals which are herbivorous, and without plants they wouldn’t survive, so the carnivors would quickly disappear. Plants are also vital in the maintaining of the climate and without plants the earth’s surface would be subject to erosion. So, to resume, life on earth wouldn’t be possible without plants.

Joyce and Linda are identical twins who are 50 years old and enjoy exercising daily. Joyce avoids eating any dairy or animal products and eats granola made with canola oil for breakfast. Linda prefers rich foods, and eats bacon, eggs, and buttered toast each morning. Which statement describes a logical inference that can be made from the provided information?

Answers

Answer:

The two sisters though identical have some differences while the former avoids fatty meals and cholesterol the latter enjoys fatty meals in contrast with the statement they both exercise daily which burns out the fat

Simple cuboidal epithelial tissue is often found lining ducts of glands
A. True
B. False

Answers

Answer:

true

Explanation:

Simple cuboidal epithelia are observed in the lining of the kidney tubules and in the ducts of glands. In simple columnar epithelium, the nucleus of the tall column-like cells tends to be elongated and located in the basal end of the cells.

the answer is true :)

What are the two ways to get air to rise?

Answers

Answer:

01. Heat it

02. Increase the density of the surrounding material

Explanation:

Have a great day, and spread some positivity!

the monomer of lipids are ______ _______ and ________ the monomers of carbohydrates are _______
word bank:
fatty, acids, monosaccharides, glycerol

Answers

Answer:

1) Glycerol and Fatty, Acids - Lipids

2) monosaccharides - Carbohydrate

What is the smallest family in the phylum Aves?
one who gets it right get brianlyness! (if i can find the button..)

Answers

Answer:

birds

Explanation:

All the websites I've found confirm this.

:)

PLEASE HELP ASAP!!
Adjust the length. How does the length of a pendulum affect its period?

Answers

Answer:

The longer the length of string, the farther the pendulum falls and therefore, the longer the period

Explanation:

which conducts water laterally and which conducts water sideways (ch tissues) ​

Answers

It’s the Xylem parenchyma

The question is in the picture

Answers

Answer:

protein specifically an amino acid

¿De qué manera comprobarías el funcionamiento del filtrador de agua?

Answers

Answer:

La forma más eficaz de determinar si su filtro de agua funciona correctamente es analizar el agua antes y después de que pase por el filtro.

Which disinfection method for wastewater is not effective in water with high turbidity?

Chlorination
Nutrient removal
Ozonation
UV light

Answers

Answer:

UV light

Explanation:

Disease or disorder that affects the immune system

Answers

Answer:

If you have an autoimmune disease, your immune system attacks healthy cells in your body by mistake. Other immune system problems happen when your immune system does not work correctly. These problems include immunodeficiency diseases. If you have an immunodeficiency disease, you get sick more often.

Explanation:

Other Questions
Is he correct, or not? please help!The freezing point of seawater is -2 C. The freezingpoint of nitric acid is -42 C. How much greater is the freezingpoint of seawater than the freezing point of nitric acid? Which of the following patterns is indicated by the population pyramid shown? 12 + 4[5% - 4(x + 5)] = 7 - 5x Calculate the number of grams of Carbon in Co2? For each equation, determine if Y as a function of X. Resting metabolism includes your basal metabolism.TrueFalse Question 5 of 20 :Select the best answer for the question5. Which statement accurately describes the relationship between mass and weight?A. An object with twice the mass of another object will weigh twice as much.B. An object with twice the mass of another object will weigh half as muchC. An object with twice the mass of another object will weigh four times as much.D. An object with twice the mass of another object will weigh one-fourth as much. Early Greek pottery most often depicted scenes from Greek mythology 1.The chemical or substance used to start a reaction are called WILL GIVE CROWNWhich passage is the best summary of "The Speech"?Samir feels nervous as he is about to give a speech about his family's immigrant story. He recalls practicing his speech for his mother. His mother makes him some tea. As he steps on stage and looks into the crowd, he realizes that the way he feels during visits to Mumbai is how his parents felt when they first came to Chicago.Samir feels nervous that he won't be understood as he is about to give a speech at his school. As he steps on stage and looks into the crowd, he realizes the importance of telling stories in order to help people understand one another. He calls on his mother to tell his classmates about her journey to America.Samir recalls his family's immigrant history and decides he wants to give a speech about it. His mother helps him practice. They discuss their family's history. As he steps on stage and looks into the crowd, he realizes the importance of telling stories in order to help people understand one another.Samir feels nervous that he won't be understood as he is about to give a speech about his family's immigrant story. He recalls a memory of practicing and being encouraged by his mother. As he steps on stage and looks into the crowd, he realizes the importance of telling stories in order to help people understand one another. PLEASEEE HELPPP. what country has found the largest dinosaur fossils What term refers to the outline around the viewpoint on a DSLR camera?Group of answer choicesapertureshutterflashframe Will give brainliest. Your cousin is selling cookies. He borrowed $10.82 from you for supplies and plans to sell each cookie for $0.75. If he sells an average of 12 cookies a day, how long will it take him to repay what he owes you AND make $25 in profit? (Round to the most reasonable number.)Question 1 options:3 days4 days5 days6 days. Show and explain your thought process for the question above. How did you reach your conclusion? What did you do to find that number? Look at the picture. Please just look at the picture and then answer it. A school bus moves at speed of 35 mi/hr for 20 miles. How long will it take the bus to get to school The height of a rocket launched with an initial velocity of v feet per second is represented by the equation d = 3 + vt 16t2, where t is the number of seconds after launch. With what initial velocity must the rocket be launched to reach a height of 255 feet in 3.5 seconds? I believe that its c, but Im not certain Can someone help me out? cch chng nhim khng kh