Question 3 (2 points)
A student observes a cell using an electron microscope. She sees a nucleus, a cell wall, DNA, and cytoplasm. She classifies the cell as
prokaryotic. What is one problem with this classification?
Prokaryotic cells never have DNA
Prokaryotic cells do not have a nucleus
Prokaryotic cells never have a cell wall
Prokaryotic cells do not have cytoplasm,
с

Answer:

Explanation:

We use the same logistic equations for the prey and predator as like in previous, and the Carrying capacity typically acts as an upper limit upon an exponential growth function.

Answer:

1. Probability is 1/2

2. Parents phenotypes:

TTHh = white spots, short hair

Tthh = white spots, long hair

Explanation:

This question involves two different genes coding for spot color and hair length in cats respectively. In the first gene, the allele for white spots (T) are dominant over the allele for solid color (t) while the allele for short hair (H) is dominant to long hair (h).

According to this question, a cross between parent cats was performed as follows: TTHh x Tthh. The following gametes will be produced by each parent:

TTHh - TH, Th, TH, Th

Tthh - Th, Th, th, th

Using these gametes in a punnet square (see attached image), 16 possible offsprings will be produced. However, according to the question, 1/2 of the offsprings will probably be white-spotted and long-haired. The phenotypes of the parents are as follows:

TTHh = white spots, short hair

Tthh = white spots, long hair

Answer:

I think its c, because that's the correct definition of a telescope. It is because if telescope weren't there, we wouldn't be able to view planets or skies in the world.

Explanation:

pls mark me brainliest

Answer:

I believe the answer is (B.)

Explanation:

The plant needs as much water as it can get, due to the dry and hot summer.

Answer:

The bird's respiratory system consists of paired lungs, which contain static structures with surfaces for gas exchange, and connected air sacs, which expand and contract causing air to move through the static lungs.

Birds do not have a diaphragm; instead, air is moved in and out of the respiratory system through pressure changes in the air sacs. ... Bird lungs do not expand or contract like the lungs of mammals. In mammalian lungs, the exchange of oxygen and carbon dioxide occurs in microscopic sacs in the lungs, called 'alveoli.'

Air sacs are found as tiny sacs off the larger breathing tubes (tracheae) of insects, as extensions of the lungs in birds, and as end organs in the lungs of certain other vertebrates. They serve to increase respiratory efficiency by providing a large surface area for gas exchange.

How do birds respire?

Some birds can sing while they fly! ... When the bird takes a second breath, the air in the lungs is sucked into the cranial air sacs -caudal thoracic, cervical, and clavicular. The cranial air sacs act as a holding chamber which provides a small back flow of air into the lungs during expirations.

Explanation:

Answer:

I would say A

Explanation:

Answer:

Some parts of an ecosystem may never recover after a oil spill

Answer:

How you approach and talk to the person you like

Explanation:

If you go up and start saying inappropriate things or immediately try to kiss them then that is aggression. But if you go up and give them a subtle and light compliment like ''Hey I like your shirt" and start a conversation, maybe at the end ask (not demand)  for her number, then that is a courtship. P.S.If you say something like give me your phone number, that is aggression.

Answer:

C. Offspring receive a mix of genes from two different parents.

Explanation:

Answer:

During the day, the sun heats up both the ocean surface and the land. ... The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze. The sea breeze strength will vary depending on the temperature difference between the land and the ocean. At night, the roles reverse.

Answer:

Explanation:

D, the answer is d

Answer:

I think D

Explanation:

Answer:

There are many different organ systems that are involved in when we exercise. The three main ones are the respiratory system which is involved in breathing, the circulatory system which circulates blood flow throughout the body and lastly the muscular system, as you use muscles when you are moving.

Explanation:

I would appreciate brainliest, if not that's ok!

Answer:

veins is the answer....

Answer:

Anaphase

Explanation:

Answer:

Due to the industrial revolution, smoke caused the environment of the peppered moths to change to a darker/black color. This resulted in a higher prevalence of black peppered moths over white peppered moths.

Explanation:

The dark environment made it so black peppered moths had the favorable trait while the white moths, who previously had the advantageous trait due to old environments being light in color, now had a deletirous trait. Predators could now more easily see the light colored moths, so they were more likely to be killed than the dark colored moths, so more dark colored moths were able to reproduce. This lead to a larger prevalence of dark peppered moths.

During the Industrial Revolution, pollution darkened tree trunks in England. This favored dark moths, causing a decline in lighter ones.

The peppered moth's environment changed due to the Industrial Revolution in England during the 19th century. Prior to the Industrial Revolution, the trees in England were predominantly light-colored, and the majority of peppered moths were also light-colored, or "typica." However, as a result of industrial pollution, the bark of the trees darkened, becoming covered in soot and ash.

This created a selective advantage for the dark-colored peppered moths, or "melanics," who were better camouflaged against the darkened trees. The change in the moth's environment was caused by the burning of coal in factories, which released soot and other pollutants into the air, leading to widespread pollution and industrialization. This phenomenon is often cited as an example of natural selection in action, as the moths adapted to their changing environment through the evolution of their coloration.

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Explanation:

Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.

How is DNA replicated?:

Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin. Several enzymes and proteins then work together to prepare, or prime, the strands for duplication. Finally, a special enzyme called DNA polymerase organizes the assembly of the new DNA strands. The following description of this three-stage process applies generally to all cells, but specific variations within the process may occur depending on organism and cell type.

What triggers replication?

A schematic shows a double-stranded DNA molecule undergoing the replication process. The left side of the molecule is double-stranded. In the middle of the molecule, a globular yellow structure, representing the protein helicase, is bound to the ends of several nitrogenous bases on the lower strand. To the right of the helicase protein, the double helix has opened and the top strand has separated from the bottom. At right, a short segment of the newly replicated double-stranded DNA molecule is visible.

Helicase (yellow) unwinds the double helix.

The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands. As the helicase moves along the DNA molecule, it continues breaking these hydrogen bonds and separating the two polynucleotide chains.

A schematic shows a double-stranded DNA molecule undergoing the replication process. At right, the double helix has opened and the top strand has separated from the bottom. A globular yellow structure, representing the protein helicase, is bound to the ends of several nitrogenous bases on the lower strand. A red globular molecule, representing the enzyme primase, is bound to the lower DNA strand to the right of helicase.

While helicase and the initiator protein (not shown) separate the two polynucleotide chains, primase (red) assembles a primer. This primer permits the next step in the replication process.

Meanwhile, as the helicase separates the strands, another enzyme called primase briefly attaches to each strand and assembles a foundation at which replication can begin. This foundation is a short stretch of nucleotides called a prime

Answer:The pancreas is located behind the stomach in the upper left abdomen. It is surrounded by other organs including the small intestine, liver, and spleen.

Explanation:

Answer:

The pancreas is located behind the stomach in the upper left abdomen. It is surrounded by other organs including the small intestine, liver, and spleen.

Answer:

I think is the top one A hope this helps

Cells have a different function it can convert chemical energy to another form of energy to maintain homeostasis, and cells cannot create energy only change the form of energy, hence option b is correct.

Every cell must continue to check its levels of energy and adjust ATP production rates in line with metabolic demand in order to keep homeostasis.

The ability of cells to sense, and convert nutrients into chemical energy is essential for the continuous fulfillment of this energy demand.

To drive metabolic reactions that would not happen automatically, to transfer necessary substances across membranes, and to do mechanical work, such as moving muscles, cells need chemical energy.

Therefore cells use energy to maintain homeostasis and can change one form of energy into another but can not create energy, hence option b is correct.

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Answer and Explanation:

It's a constrictive growth pyramid I think. They could die out in the future..

I can't remember the factors that have led to the growth

The gas that Dr. Walter Snelling discovered in 1911 that becomes a liquid under moderate pressure and acts as an energy source is propane.

Propane is a gas at room temperature and it was isolated by Dr. Walter Snelling around 1911 in the process of trying to stabilize gasoline.

At cold temperatures or moderate pressure, propane becomes a liquid.

Propane has been and is still being used as an energy source in cooking, powering vehicles, and cutting metals in industrial welding.

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Answer:

I'm thinking maybe B, illustrates the principle of natural selection.

Explanation:

This example shows that, once a particular event happens in a species' ecosystem that negatively affects their lifestyle, natural selection occurs and kills off those with a disadvantageous adaptation (in this case the narrow-beaked finches, since they could no longer eat insects but did not have the beak size to crack seeds), allowing those with the advantageous adaptation (in this case, the thicker-beaked birds) to prosper.

Answer:

It illustrates the principle of natural selection.

Explanation:

for natural selcection to occur things will change just how the was the finches caught and ate their food

Answer:

Energy

Explanation:

In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels.

Answer:

energy

Explanation:

Wave' is a common term for a number of different ways in which energy is transferred: In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels

Answer:

If you use this link it gives you most of the answers, if you want I can try to find another link to help with the rest of the questions if you want me to

Explanation:

https://quizlet.com/_30xwac?x=1jqt&i=1ilexf

Answer:

What is the source of all energy in the pyramid in Model 1

Sunlight hitting the earth's surface

How much energy does this source provide to a square meter of the Earth per year? (be sure your answer includes units)

3,190,000 kcals

Label the pyramid levels in Model 1 with the following: primary producers, primary consumers, secondary consumers, and tertiary consumers

Oak tree leaves are the primary producers

Caterpillars are the primary consumers

Blue Jays are the secondary consumers

Hawks are the tertiary consumers

What percentage of the source energy from question 1a is absorbed by the oak leaves in Model 1?

8 %

By what process do the oak leaves harness this energy?

photosynthesis

Describe how the consumers in one level of the pyramid obtain energy from the organisms at the previous level of the pyramid

By consuming them

How much energy per year do the caterpillars in Model 1 obtain from eating the leaves in a square meter of the oak tree?

4,000 kcal

What percentage of the energy that was originally absorbed by the oak tree leaves is passed on to the caterpillars

13.5%

What percentage of the energy absorbed by the oak leaves is not passed on to the caterpillars

84.3%

With your group, list at least three possible uses and/or products of the energy absorbed by the oak leaves that did not contribute to the production of biomass.

Photosynthesis, heat, leaves changing colors

Answer:

Situation

Explanation:

Heat is transferred

Temperature is how "hot" or "cold" an object is

Answer:

say ummmmm

Explanation: