Which part of the sperm cell contains mitochondria necessary to power its trip through the reproductive system?A. head
B. midpiece
C. tail
D. nucleus

Answers

Answer 1

Answer: It is actually B(the midpiece) :)

Answer 2

Answer:

The answer would be B) midpiece

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What would go wrong if your body used positivefeedback to regulate body temperature? For
example, what would happen if a person sweats
when temperature decreases?

Answers

Answer:

Most general problem: Homeostasis would be thrown off.

Explanation:

When a person sweats, they are trying to cool themselves off from a high internal body temperature, sweating when cold can make the person colder and make it even harder for that person to maintain homeostasis without throwing multiple body functions out of sync.

However there is a condition that is associated with Hyperhyrosis (increased sweating) that makes a person sweat when cold: cold sweats, however this is also concerning when a person is cold. But as long as a person has no other symptoms, it is no need for concern.

Other than that, organs can take damage. It would be like the skin going into goose bumps when a person is getting heat stroke, the organs are too hot as is the skin, but it is unable to let any response out to maintain homeostasis.

Cold sweats are also triggered by a fight or flight responce. So the main take away is that the body would not know how to react because Homeostasis has been thrown off.

Final answer:

Positive feedback amplifies changes, so if your body used this to regulate temperature, you would sweat when cold, further lowering your body temperature. This could lead to dangerous situations, such as hypothermia. Normally, the body uses negative feedback to regulate temperature.

Explanation:

If the body used positive feedback to regulate body temperature, it would disrupt the body's homeostasis. Positive feedback amplifies changes rather than counteracting them like negative feedback. So, if you began to sweat when your body temperature decreased, you would lose even more body heat, causing your body temperature to drop further. This could lead to a dangerous situation, such as hypothermia, where your body's temperature falls too low to perform physiological functions correctly.

Normally, body temperature is regulated by negative feedback. When the body gets too warm, it sweats to cool down, and when the body gets too cold, it shivers to produce heat. Thus, flipping this balance would disrupt the body's ability to maintain a stable internal environment.

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A monkey has 42 chromosomes in almost all its cells. How many chromosomes are in a monkeys haploid cells?84
42
23
21

Answers

if 42 is a diploid cell, then a haploid would have 21

If the monkeys chromosomes are haploid cells it would be 21 because haploid also means "half".

Which cells contain a nucleus and membrane-bound organelles?

Answers

Eukaryotic cells

What Is a Cell with a Nucleus?
When you think of your body, consider the ultimate boss of everything. What organ tells your entire body what to do? The answer is, your brain! Your brain tells your lungs to breathe, your heart to speed up or slow down, and your digestive system to break down food.

All these organs are made of cells. Cells are the basic units of life, and even though they are microscopic they each have a brain of their own. This brain is called the nucleus. The nucleus holds the cell's DNA and controls all cell function. Cells with a nucleus are eukaryotic, and are also known as eukaryotes.

However, not all cells have a nucleus. Some cells have their DNA just floating around the cell. This would be analogous to lower organisms, like worms, that don't have a nice thick skull around their brains. These cells are called prokaryotic. The nuclear envelope in eukaryotes is like our skull, covering the nucleus and keeping the DNA safe.

Structure of a nucleus
nucleus structure
Eukaryotic cells also have tiny parts called membrane bound organelles. Organelles, like the name sounds, are tiny organs of the cell.

Eukaryotic cells compared to prokaryotic cells
eukaryote versus prokaryote
Like our body has a stomach to digest food, cells have an organelle that serves a similar purpose. These organelles are all contained in a membrane, keeping them separate from the rest of the cell so they can be the most efficient. Let's take a look at some of the common membrane bound organelles and their jobs inside the cell.

Examples of Membrane Bound Organelles
We now know that the nucleus is the brain of the cell, holding the DNA. But other organelles inside the nucleus are also important, just like the other organs in our body are.

A city is another analogy that works for the cell. The city is the cell itself and each organelle is like a building, or part of the city. There is the endoplasmic reticulum, which surrounds the nucleus. This organelle is involved in protein and lipid synthesis, and it's kind of like a factory making the basic parts for the cell.

Those parts are shipped to the golgi to be distributed to the rest of the cell. The golgi is like the post office of the cell. From the golgi, proteins are shipped through vesicles like trucks on a highway, going where they need to be. The plasma membrane might be one destination for those proteins, since it is the outer covering of the cell. The plasma membrane is like the walls of a city, only letting certain things in and out.

The power plant of the cell, supplying energy for the entire city, is the mitochondria. And our cities also need to get rid of waste, right? An organelle called the lysosome breaks down unwanted or old materials in the cell, recycling them for later use. Finally, peroxisomes are important organelles that also do reactions using oxygen and protect the cell from free radicals, or dangerously reactive compounds.

Organelles in an animal cell
animal cell
Plant cells are a little bit different and have some additional organelles. In plant cells, there is an organelle called a vacuole, which is like a water storage tower in a city. Some animal cells have small vacuoles, but they are not as prominent as they are in plants. This organelle stores water and helps the plant cell hold its shape. Plant cells also have an even more rigid boundary outside the plasma membrane called the cell wall. This thick structure is like reinforcements on our cell wall. They also have chloroplasts, which are used to turn sunlight and carbon dioxide into food.

Organelles inside a plant cell
plant cell
Other organelles don't have a membrane but are still important. Ribosomes are a type of organelle that makes protein and can work with the endoplasmic reticulum. Both prokaryotes and eukaryotes have this organelle.

Eukaryotic cells are cells that have a nucleus and membrane-bound organelles.

Who owns eukaryotic cells?

The humans.
The animals.
The plants.

Eukaryotic cells have a membrane around the nucleus that separates them from the cytoplasm. Inside the nucleus are the nucleic acids and inside the cytoplasm are all the organelles necessary for the functioning of the cells.

Eukaryotic cells are more complex than prokaryotic cells because of their configuration.

Prokaryotic cells, on the other hand, do not have a nucleus, so the nucleic acids are loose in the cytoplasm and are not separated from the other organelles, which in this type of cell are few and less complex than those of eukaryotic cells.

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The endomembrane system includes: a. ribosomes, lysosomes, vacuoles, and the endoplasmic reticulum b. golgi apparatus, ribosomes, vacuoles, and the endoplasmic reticulum c. golgi apparatus, lysosomes, ribosomes, and the endoplasmic reticulum d. golgi apparatus, lysosomes, vacuoles, and the endoplasmic reticulum

Answers

D is the true answer

Final answer:

The endomembrane system of a cell comprises the Golgi apparatus, lysosomes, vacuoles, and the endoplasmic reticulum. It does not include ribosomes. This system works together to synthesize, transport, and modify proteins and lipids.

Explanation:

The endomembrane system in a cell includes several different components that work together to transport and modify proteins and lipids. These components include the Golgi apparatus, lysosomes, vacuoles, and the endoplasmic reticulum. The correct option for your question is therefore option d: Golgi apparatus, lysosomes, vacuoles, and the endoplasmic reticulum.

The endoplasmic reticulum (ER) is where proteins and lipids are synthesized, the Golgi apparatus modifies and sorts these molecules, the vacuoles store substances, and the lysosomes act as the cell's digestive system, breaking down waste materials and cellular debris.

It's important to note that ribosomes are not part of the endomembrane system. They are involved in protein synthesis, but they are part of a different cellular system.

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Sustainability means developing practices which protect the environment while also providing for human needs. Which of the following changes would be most helpful in achieving sustainable agriculture? A)Clearing land for agriculture by cutting down trees instead of burning them B)Rotating crops to replenish the soil with nutrients C)Tilling the ground to remove weeds and create uniform crops D)Growing crops that produce only renewable resources

Answers

The correct answer is (D)Growing crops that produce only renewable resources

The by products of the crops such as corn stovers is used to produce energy without harming the soil quality or increasing the rate of soil erosion. The crops like sunflower, canola can produce bio-oil and bio-fuel which is a renewable fuel. This type of plants should be grown so that renewable resources can be produced. This means that this practice is sustainable as it is protecting the environment and also providing resources for human needs.

Clearing land is not a sustainable practice in any form, so not A. Crop rotation is important for maintaining soil fertility, but is not necessarily sustainable. It's definitely not C. It is likely D because using only renewable resources is top notch sustainability.

Which of these help in the sexual reproduction of black bread mold? zygo

Answers

The Black Bread Mold or Rhizopus is a common type of fungous that reproduces in the same way most of the molds do. During the asexual reproduction, the mold creates spores inside a sporangium. The sporangium then breaks open and let the spores float out to spread more mold.

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hich takes places as a result of double fertilization in an angiosperm? Double fertilization produces a triploid zygote and diploid endosperm. Double fertilization produces a diploid zygote and triploid endosperm. Double fertilization produces a triploid zygote and a triploid endosperm.

Chlorophyll traps _____ from sunlight.a. oxygenc. hydrogenb. energyd. glucose

The sporophyte is much larger than the gametophyte ina. vascular plants. b. non-vascular plants. c. bryophytes. d. mosses.