Meiosis is a process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. Meiosis usually involves two distinct divisions called meiosis I and meiosis II. By the end of meiosis, a single diploid cell has produced four haploid cells.
After interphase I, the cell begins to divide, and the chromosomes pair up. In prophase 1 of meiosis, each replicated chromosome pairs with its corresponding homologous chromosome. This pairing forms a structure called a tetrad, which contains four chromatids. As the chromosomes pair, they sometimes undergo a process called crossing-over.
Which is a true statement of crossing-over?
A. Homologous chromosomes move to opposite ends of dividing cells
B. During crossing-over, bits and pieces of the homologous chromosomes are exchanged
C. The DNA of the diploid cell is copied
D. Crossing over decreases genetic diversity
Answer:
B.
Explanation:
D is wrong because it Increases gentetic diversity
C we are talking about the chromosome not the cell
A That is later on in telophase I
help me with this question please!!
Answer
the first choice
Explanation:
*
Which sequence of energy transformation is happening in this image?
which of the following is an example of an abiotic limiting factor on population size
a)water availability
b) predation
c)disease
d)availability of food
Answer:
It is A
Explanation:
A
When plants need to store the extra glucose they make during photosynthesis, they join the glucose molecules together to make
Answer:
Plants store glucose in the form of starch a polysaccharide
Explanation:
List three organs that are part of the organ system and describe the function of each organ in a sentence or less 
Answer:
Urinary system filters your blood, removing waste and excess water.
Your digestive system breaks nutrients into parts small enough for your body to absorb and use for energy, growth, and cell repair.
The immune system is a complex network of cells and proteins that defends the body against infection.
the chemical formula for water is
Answer:
H20
Explanation:
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The chemical formula for water is H2O
What would be the reason that someone’s eye color would change from blue to green when they were a child?
postcranial changes in hominins that indicate bipedal locomotion include group of answer choices shortening and broadening of the ilium of the pelvic girdle increased length of arms relative to legs feet with opposable big toes for grasping all of these answers are correct
Option A: Postcranial changes in hominins that indicate bipedal locomotion include shortening and broadening of the ilium of the pelvic girdle.
Around 3 million years ago, bipedal locomotion in early hominins turned to be more effective. This adaption made the hominins more stable to hold their weight and walk upright. It also helped them to see longer distances in the green forests areas. They could take the advantage of hunting their food or protecting them from harmful predators. Adapting bipedal location expended lesser energy, thus allowing hominins to walk longer distances.
Over many generations now, bipedal location turned out to develop stronger and longer legs and feet so as to allow running and holding more weights. Additionally, the arms turned to be more adapted to hold the heavier things efficiently and to carry their newborns effectively.
Owing all these changes, adaption made to this kind of locomotion include shortening and broadening of the ilium of the pelvic girdle and developed a bowl-shape structure.
Thus, option A is the correct answer.
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Brown-eyed alma has a blue-eyed mother and a brown-eyed father. In this case, her brown eyes were determined by a _____ allele.
In this instance, a dominant allele was responsible for her brown eyes.
Dominant alleles: what are they?A dominant allele is a gene variant that, even in the presence of other alleles, will cause a certain phenotype.Usually, a dominant allele codes for a protein that functions. One copy of the allele generates enough enzyme for a cell to have an abundance of a certain product, which is why the allele is dominant.What makes a gene a dominant allele?Because it hides the recessive trait and manifests in the phenotype of a heterozygous creature, a dominant allele is referred to as dominant. It takes just one allele to express the characteristic.learn more about dominant allele here
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the small intestine is at the same level of organization as which of the following heart, connective tissue, digestive system, or epithelial cell?
Answer:
Heart
Explanation:
They are both organs, everything else is too big or too small.
The small intestine is at the same level of organization as the heart. The correct option is a.
What is the level of organization?The body is divided into different levels of the organization. These levels of organization are cellular level, tissue level, organ, organ system, and organism.
At the cellular level, the cell is the base unit of life. At the tissue level, the cells joined and compose tissues. At the organs level, tissues are joined to make organs, and many organs form an organism.
The small intestine and heart are organs, so they come in the same level of organization. The organ. The digestive system comes from the organs system and epithelial cell comes at the cellular levels. Connective tissue comes under tissue level.
Thus, the correct option is a. heart.
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How many copies of chromosomes do gametes contain?
one
two
three
none
Human cells that contain one set of 23 chromosomes are called gametes, or sex cells; these eggs and sperm are designated n, or haploid. The matched pairs of chromosomes in a diploid organism are called homologous chromosomes.
Answer: Its 1
Explanation:
Performed by autotrophs.
Select one:
a. Cellular Respiration
b. Both Photosynthesis and Cellular
Respiration
c. Neither Photosynthesis nor Cellular
Respiration
d. Photosynthesis
What could be some weaknesses with using a test cross to determine Fred’s genotype?
Answer:
The disadvantage of this test and it's weakness is if there is a genetic trait with complete domination, then the plant with the recessive characteristic has to be acquired.
Explanation:
To determine a genotype is not that easy and effortless because you can't see the genes of one organism if you just look at it.
Mary Jane’s red hair is a recessive trait. If Peter is heterozygous for hair color, what is the chance their baby will have red hair?
1/4
2/4
0
3/4
Answer:
2/4
Explanation:
If you know how to do a punnet square then you should use it, but if not then this is how you do it: (look at the document below)
explain the role of diaphragm in the process of breathing
Answer:
The diaphragm muscle contacts and relaxes to force the intake and expulsion of air from the lungs.
Explanation:
The diaphragm is a large, dome-shaped skeletal muscle. It is very thin, and is located at the base of the chest just above the abdomen. It plays a very important role during respiration or breathing by forcing the intake and expulsion of air from the lungs.
During inhalation, this muscle contracts, and flattens- in the process, a vacuum is created, effectively pulling air into the space. In exhalation the muscle relaxes, and is no longer flattened, this reduces the volume of the region, forcing air out of the lungs. These contractions occur rhythmically and continuously.
A biological community and the physical environment associated with it is called the
Answer:
ecosystem
Explanation:
where are tissues in a herbaceous stem established?
The herbaceous stem is composed of vascular bundles (xylem and phloem) arranged in a circle around a central core of spongy tissue made up of parenchyma cells, called the pith. Surrounding the vascular bundles is a layer known as the cortex, which varies in thickness from species to species.
please help? I really need it
Answer:
Pretty sure it’s centromere sorry if I’m late Ik quizzes is timed :(
Explanation:
+PLEASE HELP ASAP DUE 20 MINUTOS i
I WILL give BRAINLIST:;)))
Answer:
UM No
Explanation:
SOMEONE PLEASE HELP ME PLEASE!!!!!!!!!!!!!!!!!!?!!!!!
Answer:
the correct answer is "C. 4"
Explanation:
The nucleus is a double-membraned organelle found in all eukaryotic cells. It is the largest organelle, which functions as the control center of the cellular activities and is the storehouse of the cell’s DNA. By structure, the nucleus is dark, round, surrounded by a nuclear membrane.
When an earthquake occurs, S waves are the first seismic waves to arrive at a given location. Please select the best answer from the choices provided T F
Answer:
False
Explanation:
S -waves are not the first set of waves to arrive at a seismic station after an earthquake event has occurred
These waves are the second set of waves to be picked up at a seismic recording station.
S - waves are shear or secondary waves. They are the second to arrive at a seismic station. P - waves are the fastest waves with the greatest velocity. They are the first set of waves to arrive at a seismic station. P - waves are simply longitudinal waves and they are the fastest elastic waves.Answer:
false your welcome
Explanation:
why are casts, molds, and trace fossils so common?
Answer:
Cast fossils occur when mold fossils are filled in with minerals that harden over time, creating a fossilized replica of the original organism. Water seeps through the rock surrounding the mold fossil, leaving behind minerals which fill the mold. Any mold fossil can potentially form a cast mold.
Explanation:
Answer:
Cast fossils occur when mold fossils are filled in with minerals that harden over time, creating a fossilized replica of the original organism. Water seeps through the rock surrounding the mold fossil, leaving behind minerals which fill the mold. ... Any mold fossil can potentially form a cast mold
Explanation:
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Discuss the benefits and costs of different methods of irrigation, both to the farmer and the watershed
The fundamental goal of irrigation, which is to augment water provided by rainfall in order to increase crop yields and/or crop quality, hasn't changed much through time, despite substantial technological advancements.
Crop irrigation is an agricultural practise that has been used for many centuries in human history. The various forms of irrigation include
sprinkler irrigationsurface irrigationdrip irrigationsub-irrigationmanual irrigation.There are five different irrigation methods that can artificially supply water to plants:
Flooding or furrow irrigation involves completely soaking the soil surface and moving the water by gravity through the area. Nutrients, hydrogen, and oxygen are distributed to your roots more consistently with irrigation. High-pressure sprinklers placed in the field are used to water crops; they can be stationary or moved by manually.
Learn more about irrigation
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pls help im struggling i’ll give branliest
Its d if not im so very sorry
Explain how oxygen gets to your cells and waste gets out through the circulatory and respiratory systems.
Answer:
The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell. When oxygen passes into the bloodstream, carbon dioxide leaves it.
Explanation:
Also r u bi??
a soft, progressive lesion of cementum and dentin that involves bacterial infection and invasion is known as:
Answer:
Root Caries
Explanation:
A. How does a hot-spot supervolcano (such as Yellowstone) form? (5 points)
B. What type of volcano is Mount Saint Helens? (2 points)
C. How is the formation of this type of volcano different than that of a hot-spot volcano?
(6 points)
When is now-casting used?
15 days from now
Severe Weather Events
Clear Sky Days
Sunny Days
Answer:
Severe Weather Events
Explanation:
JUST TOOK THE QUIZ
Now-casting is most commonly used during severe weather events to provide up-to-date information and warnings.
Now-casting is a type of short-term weather forecasting that focuses on the current and immediate future weather conditions, typically up to a few hours or a few days ahead. It is used to provide real-time updates and predictions for weather events that are occurring or expected to occur in the near term.
Now-casting is commonly employed during severe weather events such as thunderstorms, hurricanes, tornadoes, or heavy rainfall. It helps meteorologists monitor the current conditions, track the progression of the weather system, and issue timely warnings or advisories to the public.
While it may also be employed during clear sky days and sunny days, its focus is primarily on dynamic weather situations and short-term forecasts rather than stable weather patterns.
Therefore, now-casting is most commonly used during severe weather events to provide up-to-date information and warnings.
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Where is ATP produced in the cells during cellular respiration?
O Golgi bodies
mitochondria
O nucleus
O ribosomes
Answer: b mitochondria
Explanation: