During which phases of the cell cycle are chromosomes composed of two chromatids?
Answer:
The correct phases are S phase, prophase, anaphase.
Explanation:
The cell cycle, the sequence of events spanning the period from the completion of one cell division to the end of the next division, involves both the division of the cell nucleus (karyokinesis) and the division of the cytoplasm (cytokinesis). S phase, the next section of the interface, is marked by a dramatic increase in DNA synthesis and the synthesis of histones which are major cellular proteins bound to DNA. The cell is preparing for the start of mitosis. Chromosomes duplicate lengthwise, and each chromosome consists of two identical "chromatids."During prophase, the degree of packing of the chromatin increases, so the chromosomes become shorter and thicker and the centromeres begin to become visible. Each of the chromosomes, due to its duplication in S phase, is made up of two identical chromatids, called sister chromatids. Anaphase is the short phase, the sister chromatids begin to separate and migrate to the poles. Once the two chromatids separate, each is called a chromosome.
After earthquakes, hot springs sometimes stop bubbling, and new hot springs form. Why might this be
Answer:
The magma moved. The crystaline water is no longer being heated by the magma so it stops being a hot spring.
Answer:
The magma melts
Explanation:
Plant cells have some organelles that animal cells do not. Check all organelles that ONLY plant cells have.
A
chloroplast
B
nucleus
C
cell membrane
D
cytoplasm
E
cell wall
F
mitochondria
Answer: Plant cells only have chloroplast and a cell wall. Which is A and E.
PLEASE HELP BRAINLIEST. I'LL GIVE YOU 15 POINTS (science-8th grade)
Part 1: Which process does arrow F represent?
Part 2: Explain how matter is conserved during the process.
Part 3: Justify why this process is a recycling of carbon in the carbon cycle.
Use complete sentences to explain your answer.
Answer: Process F represents photosynthesis,
The AMOUNT of oxygen and carbon atoms released by photosynthesis are EXACTLY EQUAL to the atoms of these materials contained in carbon-dioxide converted.
this process recycles carbon by absorbing it from the air or soil to create oxygen and glucose
Explanation:
One difference between gene mutation and chromosomal mutation that
Answer:
c. A chromosomal mutation can change the total number of chromosomes in the cell.
Explanation:
A gene mutation affects a single gene, and replication error is the main cause of gene mutation. A chromosomal mutation affects one part of chromosome or full chromosome. error in meiosis is the main cause of chromosomal mutation. Both mutations are responsible for a change in DNA. A chromosomal mutation leads to the change in total number of chromosomes in the cell.
Within a species of jungle beetles, some beetles are fast-walkers and some are slow-walkers. Some beetles are brown and some are green. Some beetles can fly and some cannot. This species of beetles shows
Answer:
variation
Explanation: I took the test
Answer:
variation
Explanation:
7: Explain how dissolving sugar in water is different than dissolving salt. What
causes this?
Answer:
For a given solvent, some solutes have greater solubility than others. For example, sugar is much more soluble in water than is salt. But even sugar has an upper limit on how much can dissolve. I hope this helps!
Explanation:
Explain how diffusion is used to support the life processes of animals.
Answer:Diffusion is important to cells because it allows them to gain the useful substances they require to obtain energy and grow.
Explanation:Diffusion is important to cells because it allows them to gain the useful substances they require to obtain energy and grow, and lets them get rid of waste products. This table shows examples of substances required by cell and associated waste products.
write the function of intestinal glands.
Answers
Intestinal glands, occupying the mucous membrane, secrete digestive enzymes, provide outlet ports for Brunner glands, and produce cells that replace surface-membrane cells shed from the tips of villi.
Explanation:
The movement of the ________ causes the crust to break apart into large plates.
A) mantle
B) crust
C) outer core
D) inner core
Answer:
mantle maybe
..!°π°!..
Based on the cell theory, which of the following is true? (5 points)
a
All cells are too small to be seen.
b
All living things are made of cells.
c
Small organisms have more cells than large organisms.
d
Large organisms have larger cells than small organisms.
what type of plant community will develop at an average annual temperature of 15 C and an average annual precipitation of 150 cm
Answer:801
Explanation:e bhbiiyhihiu
What might happen within an ecosystem if the snake population runs out of small animals to eat such as mice or rabbits?
Does the distance from earth to sun determine the seasons? please explain
Answer:
nope
Explanation:
Contrary to popular belief, the seasons are not determined by the earth's distance from the sun. The seasons are actually caused by the earth's tilted axis. Because the axis is tilted, when the Northern Hemisphere is tilted towards the sun, it's warm.
hope this helps:)
Plz Help
A population of wolves migrate North in search of food. As the wolves travel they enter a region that has long, snowy Winters. This makes them better able to sneak up on prey.
A.) Give two reasons that the population is not a Hardy Weinberg equilibrium.
C.) How are the allele frequency change in the wolf population
Answer:
A, This is the case of selective pressure of environmental factors like snow, due to which favored the expression of the allele that formed white coat phenotype. This is not a Hardy-Weinberg principle, in which no selective pressure is applied. The relative frequencies of the alleles change in the gene pool, due to selective pressure, and the expressed alleles are often significant for survival in those conditions.
b,HW equilibrium means no selective pressures like the long, snowy winters selectively favoring the white coat phenotype over the other coat phenotypes. Selective pressures change the relative frequencies of the alleles in the gene pool. It also means the population does not have either immigration or emigration to change the ratios of alleles in the gene pool The Hardy-Weinberg principle of genetic equilibrium tells us what to expect when a sexually reproducing population has no selection pressure, no gene flow, no nonrandom mating, not even genetic drift.
C, ?? I don’t know
Explanation:
What is a convergent boundary? Name one example of a convergent boundary.
Answer:
The Washington-Oregon coastline of the United States is an example of this type of convergent plate boundary.
Identify the two main processes through which carbon is cycled between the
atmosphere and living things.
Identify the main places carbon is stored.
Answer:
Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth. Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them.
Explanation:
Please give thanks to all my answers and please mark as brilliant and please follow me
What are the effects of enzymes on chemical reactions? Select all of the answers that apply.
A. Enzymes increase the heat of reaction.
B. Enzymes decrease the activation energy.
C. Enzymes increase the rate of the reaction.
D. Enzymes change the ideal pH for a reaction to proceed.
E. Enzymes provide a site where reactants can be brought together.
In an animal species, black (B) fur is dominant over brown (b) fur. Which statement describes the phenotypes of the offspring from a cross between two homo...zygous black-furred animals?
Group of answer choices:
A. All of the offspring will have brown fur.
B. Three-fourths of the offspring will have black fur, and one-fourth of the offspring will have brown fur.
C. All of the offspring will have black fur.
D. One-half of the offspring will have black fur, and one-half of the offspring will have brown fur.
Explanation:
C All the offspring will have black fur
How does endoplasmic reticulum arise?.
Explanation:
it arrises from the nucleus. that is why most of the eukaryotic cells have endoplasmic reticulum. The membranes of the ER are continuous with the outer nuclear membrane
Which statement is true?
1. Friction is a force that causes moving objects to stop.
2. Energy is lost when friction stops an object with heat.
3. Energy is present in moving objects but not stopped ones.
The answer is 1st statement.
Answer:
Explanation: The force which opposes the relative motion between 2 surfaces in contact is known as friction.
The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait. Based on this pedigree, what are the most likely genotypes of individuals I-1 and I-2? I-1: aa I-2: Aa I-1: AA I-2: Aa I-1: Aa I-2: aa I-1: aa I-2: AA
Answer: c
Explanation:
where do women settlements flourish
Answer:
Favorable geographic as well as environmental conditions.
Explanation:
Human settlement flourish at that place where favorable geographic as well as environmental conditions are available such as availability of water , a suitable climate, fertile land etc. these resources attracts human to settle there due to availability of basic needs. If these natural resources are not present in a location so people does not came to settle there.
The effect on an organism or population of chemical exposure is called __________.
A)
natural hazard
B)
gene-environment interactions
C)
physiology
D)
dose response
E)
heredity
13. What led to the application of ethical standards to relationships between people and their environment?
Answer:
★ People's awareness of the environmental changes brought about by industrialization
Explanation:
Hope you have a great day :)
Industrial Revolution was the phenomenon that led to the application of ethical standards to relationships between people and their environment.
Environmental ethics is a current philosophical thought that originated after the Industrial Revolution as a result of the environmental damage that had been done to different ecosystems and species as a result of the industrial revolution.
Environmental ethics proposes a modification in the relationships between human beings and their environment from a moral perspective to ensure the preservation or restoration of said natural values.
Learn more in: https://brainly.com/question/455063
7. Explain what genetic counseling is and how pedigrees and amniocentesis are used.
Answer:
Pedigrees are used by genetic counselors to study family history and search for trends that may indicate a risk in the family for genetic abnormalities or health-related conditions.
What perspective maintains that generalized anxiety disorder develops as a result of exposure to threatening environments?
Answer:
sociocultural
Explanation:
Sociocultural maintains that generalized anxiety disorder develops as a result of exposure to threatening environments.
Sociocultural means combining social and cultural factors.
The focus of study in anthropology is an example of sociocultural.
The theory of sociocultural perspective explains how behaviors of individuals are affected by their social and cultural factors.
Can you guys help me please I’ve gotten to many wrong already.
Answer:
I would say A
Explanation:
How does the lipid portion help maintain water concentration on each side of the bilateral?
Answer:
Explanation:The phospholipid bilayer formed by these interactions makes a good barrier between the interior and exterior of the cell, because water and other polar or charged substances cannot easily cross the hydrophobic core of the membrane. Can water cross the plasma membrane at all?
It also helps the cell move things in and out. The cell membrane is made of what is called a phospholipid bilayer, which means it has two layers of phospholipids. ... This allows the phosphates to be exposed to water, either in the cell or the environment, while the lipids are protected from water Lipids are essential for all life on Earth. They play many important roles in maintaining the health of an organism. Arguably the most important function lipids perform is as the building blocks of cellular membranes. Other functions include energy storage, insulation, cellular communication and protection.Large quantities of water molecules constantly move across cell membranes by simple diffusion, often facilitated by movement through membrane proteins, including aquaporins. In general, net movement of water into or out of cells is negligible.
Bacteria and viruses that cause disease can disrupt homeostasis and make you sick.
true
false
Answer:
TRUE
Explanation:
bacteria can also disrupt homeostasis in your body, and can make you sick. Any substance that causes the disease is called a pathogen. Your body reacts to pathogens to try and maintain homeostasis, and certain symptoms will appear as your body tries to get back on track.