Answer:
the DNA molecules are progressively shortened and condensed by coiling, to form visible chromosomes. ... The spindle fibers shorten and the centromere splits separating the two sister chromatids, the individual chromosomes are pulled to opposite poles of the cell.
Explanation:
A woman bought 10 crates of eggs from the market. On getting home, she realized that 15 eggs were broken. What is the ratio of broken eggs to unbroken eggs.
Answer:
B:U = 1:20
Explanation:
Let the number of broken eggs be B.
Let the number of unbroken eggs be U.
Given the following data;
Number of crates of egg = 10 crates
But, 1 crate of egg = 30 eggs
10 crates of egg = 30 * 10 = 300 eggs
B = 15 eggs
U = 300 eggs
Ratio B to U = B:U
B:U = 15:300
Dividing by 15, we have;
B:U = 1:20
PLEASE HELP!!!!!!!!
Choose: one specific animal
State: whether it is an invertebrate, fish, amphibian, reptile, bird or mamal
Describe: some of its adaptations and characteristics
Describe: how this animal is important to their ecosystem. How do they help to keep their ecosystem in balance?
Answer:
Red kangaroo
Mammal
Red/brown in colour to camouflage with environment, have big strong feet which they use to jump high, active at night when temperatures aren't high
They control the population of wild grasses
0
1 pts
Which group consists of an example from each of the 4 organic macromolecules?
O enzymes, DNA, steroids, starch
O enzymes, carbon dioxide, water, oxygen
O enzymes, starch, carbon dioxide, steroids
O enzymes, water, steroids, oxygen ?
Use your understanding of prevention and treatment of viruses to answer the questions below.
A
is a substance containing incomplete portions of a virus that produce an immune response when injected into the body.
I'm a bit confused about this question. But I will try my best to answer. :)
To prevent a certain virus, or increase someone's immunity towards a virus, doctors give patients a shot/vaccine. For example, people get a flu shot yearly to help prevent them from getting the flu. The shot contains a small portion of the flu itself. The flu remains dormant until the body decides to activate it or fight it off. This also helps the body become more immune to the virus/sickness and fight it off easier.
I hope this helps! :)
A hapten is a substance containing incomplete portions of a virus that produce an immune response when injected into the body.
What is the Immune response?The immune response may be defined as the type of reaction that occurs in response to specific antigens or foreign agents. Such types of responses defend the organism against foreign invaders.
A hapten is essentially an incomplete antigenic particle. Such small substances or molecules only elicit an immune response when attached to a carrier known as proteins.
Carrier molecules typically do not elicit an immune response by themselves.
Therefore, it is well described above.
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All of the following are functions of asexual reproduction except _____.
growth
producing gametes (sex cells)
making new organisms
replacing old or damaged cells or tissues
All of the following are functions of asexual reproduction except producing gametes.
What do you mean asexual reproduction?Asexual reproduction is a mode of reproduction in which a new offspring is produced by a single parent. The new individuals produced are genetically and physically identical to each other, i.e., they are the clones of their parents.
Asexual reproduction is a type of reproduction in which only one parent is involved. There are basically 5 types of asexual reproduction. These are binary fission, budding, vegetative reproduction, fragmentation and by spores.
The major disadvantages of asexual reproduction are: Lack of diversity- Since the offsprings are genetically identical to the parent they are more susceptible to the same diseases and nutrient deficiencies as the parent.
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The development by gardeners of a new color in a rose through breeding is the result of
• artificial selection
•natural selection
•overproduction
•descent with modification
Answer:
Artificial Selection
Explanation:
what does the G and A represent in GAA-TTC-GCA
Answer:
I think the answer would be guanine and adenine
Which of the pathogens could most likely be effectively treated with antibiotics?
A) only step throat
B) only tuberculosis and strep throat
C) only tuberculosis and common cold
D) All of the three pathogens are effectively treated with antibiotics
Answer:
B
Explanation:
You wont need to go get antibiotics to treat a common cold, just use over the counter meds. Strep and tuberculosis are more contagious and powerful.
Is it possible to have a knockout mutant plant that shows no visible phenotype that is different from the wild-type plant?
Answer:
Molecular genetic approaches to the study of plant metabolism can be traced back to the isolation of the first cDNA encoding a plant enzyme (Bedbrook et al., 1980), the use of the Agrobacterium Ti plasmid to introduce foreign DNA into plant cells (Hernalsteens et al., 1980) and the establishment of routine plant transformation systems (Bevan, 1984; Horsch et al., 1985). It became possible to express foreign genes in plants and potentially to overexpress plant genes using cDNAs linked to strong promoters, with the aim of modifying metabolism. However, the discovery of the antisense phenomenon of plant gene silencing (van der Krol et al., 1988; Smith et al., 1988), and subsequently co‐suppression (Napoli et al., 1990; van der Krol et al., 1990), provided the most powerful and widely‐used methods for investigating the roles of specific enzymes in metabolism and plant growth. The antisense or co‐supression of gene expression, collectively known as post‐transcriptional gene silencing (PTGS), has been particularly versatile and powerful in studies of plant metabolism. With such molecular tools in place, plant metabolism became accessible to investigation and manipulation through genetic modification and dramatic progress was made in subsequent years (Stitt and Sonnewald, 1995; Herbers and Sonnewald, 1996), particularly in studies of solanaceous species (Frommer and Sonnewald, 1995).
Which of the following is an example of deposition?
a. glaciers wearing down layers of rock b. a muddy river carrying sediment downstream c. ponds filling up with sediment and becoming marshes d. frost wedging splitting rocks apart
Glacial erratics are the name given to these rocks. Erratics serve as a log of a glacier's journey. Complex flow patterns can be discovered by looking for the bedrock units that match with erratics. Thus option A is correct.
What glaciers wearing down layers of rock?The rocks and the ground below are both eroded as a result of the friction caused by glaciers carrying rocks. In this manner, glaciers pulverize rocks and remove dirt. Mountain valleys with steep sides are created by advancing glaciers carving out basins. Moraine, an eroded debris, is frequently seen on and surrounding glaciers.
Mechanical weathering causes the rock on valley walls to become loose as glaciers flow, where it then falls as debris. Rocks of any size, from enormous boulders to silt, can be carried by glaciers. Over many years and decades, these rocks can be transported a great distance.
Therefore, glaciers wearing down layers of rock.
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3. Which part of the digestive system compacts waste and makes vitamin K?
O the pancreas
O the liver
O the colon
O the stomach
What is the purpose of the pulmonary artery?
Answer:
Hey mate.....
Explanation:
This is ur answer....
Pulmonary circulation pumps deoxygenated blood through the pulmonary artery. This artery divides above the heart into two branches, to the right and left lungs, where the arteries further subdivide into smaller and smaller branches until the capillaries in the pulmonary air sacs (alveoli) are reached.
Hope it helps!
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how does dna replicate
please help!!!
What are things that tend to gain electrons and become negative
Explanation:
This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond. An atom that loses one or more valence electrons to become a positively charged ion is known as a cation, while an atom that gains electrons and becomes negatively charged is known as an anion.
_________is the breaking down of biomolecule components (food) for use by cells.
Answer:
Chemical Digestion
Explanation:
A high population of greater prairie chickens once inhabited the prairies of Illinois. The conversion of the prairies into agricultural land caused the chickens to lose their habitat. Studies have concluded that this change greatly reduced the greater prairie chicken population. The habitat loss also resulted in a decrease in the population’s genetic variation.
Which change in the gene pool occurred in the greater prairie chicken population?
gene mutation
gene flow
genetic drift
genetic resistance
The answer is C. genetic drift
Genetic drift affects the population size and decreases genetic variability by setting some alleles and losing others. Option C. The exposed example is a case of genetic drift - bottleneck effect -.
What is genetic drift?
Genetic drift is an evolutive force. It refers to the random change that occurs in the allelic frequency of a population through generations.
The magnitude of this change is inversely related to the size of the original population.
These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic variation in the population decrease.
Genetic drift affects a population and reduces its size dramatically due to
a disaster or pressure ⇒ bottleneck effectthe population split ⇒ founder effect.The exposed example is a case of the bottleneck effect. The conversion of the prairies into agricultural land and the consequent habitat loss is the pressure acting on this prairie chickens population. The population decreases in size and decreases its genetic variation.
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A ten mile area of Trees (B) is removed from the tropical rainforest. How will this affect the amount of water (A) and the amount of oxygen (A) in the area?
This is on Ecology. The A is Abiotic. The B is Biotic. If you don't know this then don't answer.
Thank you
Complete each statement. 7. ________________ , guanine (G), cytosine (C), and thymine (T) are the four _________________
Answer:
Adenine
Nitrogenous bases
Explanation:
What are the most basic blocks o all organisms
Answer:
This is your answer ☺️☺️☺️
PLZ HELP ME
Which of the following is the most likely long-term effect of untreated high blood pressure?
Decrease in blood flow to the extremities
Increase in the number of arterial deposits
Decrease in the number of blockages or clots
Increase in the overall blood volume
Answer:
It will increase
Explanation:
Answer:
Increase in the number of arterial deposits
Explanation:
I answered the question and got it right (the right answers are hidden but it would tell you if you got one wrong tho)
Eukaryotic cells and prokaryotic cells have some parts that are different. Which of the following would you find only in a eukaryotic cell?
A. membrane-bound organelles and a nucleus
B. a nucleus and organelles without membranes
C. a cell membrane and organelles without membranes
D. membrane-bound organelles and DNA in cytoplasm
Answer:
A
Explanation:
Answer:
A
Explanation:
Within a eukaryotic cell, each membrane-bound structure carries out specific cellular functions. Here is an overview of many of the primary components of eukaryotic cells.
Nucleus, Nucleolus, Plasma membrane, Cytoskeleton or cell wall, Ribosomes, Mitochondria, Cytoplasm, Cytosol, Endoplasmic reticulum, Vesicles and vacuoles.
A grassy meadow high in the Sierra Nevada Mountains of eastern California is known to support a variety of organisms. During the summers when grass is thick and lush, and wildflowers abound, butterflies take advantage of this abundant nectar source. Bears graze on the berries in shrubs at the edge of the meadow. Deer also forage at the edge of the meadow. In the early mornings, coyotes are known to prey on the squirrel and mouse populations that burrow into the meadow soil. A variety of birds prey on the butterflies and other flying insects, such as bees and wasps. The coyotes would be classified as ____. Group of answer choices
Answer:
carnivore and secondary consumers
Explanation:
Carnivorous are organisms that fulfill their energy requirements by feeding animal tissues and/or meat, either hunting or scavenging. In the food chain, secondary consumers are those organisms that obtain energy by eating primary consumers (herbivores). In this case, the coyotes can be easily classified as carnivores and secondary consumers because they hunt squirrels and mice, which in turn eat autotrophic plants (primary consumers).
How many chromosomes are in the gametes of an organism that has 88 chromosomes in its diploid cells?
Answer:
It is a worldwide universal truth that all living organisms produce gametes which comprised of a quasi or half number of Chromosomes in contrast to their inventive number of chromosome. Generally, in simple words, the gametes ploidy will be going halves on than the ploidy of the organism.
Ovum is the ‘female’ gamete which is truly the new-fangled individual of the species. It is basically, the solo cell in which disunion progression take place and baby will make. The ovum being single cell comprised of, ample chromosomes set. In humans Ovum chromosomes is 22 and one more X chromosome overall, making it 23 chromosomes. �The ovum required chromosomal set to become doubled and to the concert itself in the baby by development and cell division. This can be done once after when comprehensive and identical chromosomes of sperm combined with ovum after mating. Therefore, humans body cells comprised of 46 chromosomes.
Explanation:
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Which two characteristics do seedless vascular plants have that nonvascular plants do not have?
A) they have phloem and true stems
B) They have roots and use spores to reproduce
C) They live in moist environments and have xylem
D) They have phloem and use spores to reproduce
Answer:
C) They live in moist environments and have xylem.
what is propanone is used to remove varnish
Answer:
Acetone, a colorless liquid also known as Propanone, is a solvent used in manufacture of plastics and other industrial products.It is also used in nail polish removers and can remove most stains including varnish hope this answer helps
pls help:
why would you expect Greenland to have a higher albedo than its surrounding areas?
The albedo of the ice sheet is high in winter when much of Greenland is covered by fresh snow.
Greenland is filled with ice and has a higher reflectance rate as in winters it's covered with fresh snow.
Where is Greenland?The greenland is an island nation and lies between the arctic and Atlantic ocean. Has an area of 2.166 million square km and is among the largest island in the world.
It has the third-largest area in North America after Canada, The lowest temperature is recorded in Greenland in the northern hemispheres. Greenland is Greenland snow is thick and fresh in winter this creates a higher albedo.
Find out more informaion about Greenland.
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A community is
all the organisms living in an area that have the potential to interact
all the individuals of a species that can potentially interact
all the animal species that can potentially interact with all the plant species in an area
all the organisms and abiotic components of an area that have the potential to interact
A place filled with people that will assist in raising your child...and bully them, peer-pressure them, etc.
Answer:
all the organisms living in an area that have the potential to interact
Explanation:
explain explicitly how 3 body systems work together
Answer/Explanation:
Using body systems respiratory, circulatory, and muscle.
The respiratory, circulatory, and muscle work together because the circulatory carries blood to the muscles and respiratory systems. The respiratory systems gives breathe and makes it able to live so the other two can function. The muscle systems helps move using the breath of life and the blood from the circulatory.
Hope this helps :)
Which best describes transduction bacteria
Answer:
Bacteria transferring DNA with a bacteriophage and bacteria taking DNA from their environment both best describe transduction in bacteria.
Answer:
Bacteria transfer DNA with a bacteriophage.
Explanation:
Which are organs of the digestive system?
Answer:
The main ones are the mouth, stomach, small intestine, large intestine, the liver, etc.
Explanation:
Hope this helps :)
Answer:
Theres a lot LOL:
- esophagus
- stomach
- large intestine
- small intestine
- liver
- pancreas
- gallbladder
Explanation: