Answer:
Answer
Explanation:
Eukaryotes are the cells that make up our bodies, plants and animals and all cellular organisms that contain their genetic material in a nucleus, have a cytoskeleton and contain organelles, such as mitochondria or cytoplasts. Eukaryotes are thought to have evolved from prokaryotes. Bacteria and archaea are classified as prokaryotes, a group of simple, single-cell organisms. Prokaryotes usually contain a single, circular deoxyribonucleic acid, DNA, molecule and lack a nucleus and intracellular organelles.
Linda, a farmer, is cultivating corn and rice on her land. She also raises sheep and cows for their meat. Which type of farming Linda is practicing?
A.
mixed farming
B.
livestock ranching
C.
intensive subsistence farming
D.
nomadic herding
Answer: Mixed Farming
Explanation:
With Linda working with Rice and Corn, while still involving her cattle and livestock, this makes it a Mixed Farming situation with how she integrates the other options.
What is the monomer of DNA?
A. amino acid
B. monosaccharide
C. nucleotide
D. fatty acid
Answer:
The nucleotide is the monomer of DNA
Explanation:
This is because they are made up of (deoxyribose) and a phosphate residue. The four bases are adenine (A), cytosine (C), guanine (G) and thymine (T). Which are all components of DNA
Answer:
C. nucleotide
Explanation:
The monomers of DNA are known as the nucleotides.
David was sitting in his hotel room reading a book, when he heard a knock at the door, and the sound of someone trying the door handle. He opened the door,
where he saw a man whom he had never seen before. The man said, "I'm terribly sorry... I thought this was my room. Wrong floor, I guess. He then walked
off down the hall toward the elevator. David went back into his room, thought about what had just happened, and then phoned the front desk, suggesting they
call the police, since the man at the door had obviously been a thief.
Why was David so sure the man had been a thief?
Answer:
if he thought that it was his own room, he wouldn't have knocked (because people don't knock on their own rooms)
Which of the following would a prokaryote have?
A. Cytoplasm
B. Nucleus
C. Mitochondria
D. Golgi apparatus
plsss help!..............
Answer:
hope this helps!
Explanation:
When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. ... The binding allows the nerve impulse to travel through the receiving neuron.
source: https://flexbooks.ck12.org/cbook/ck-12-middle-school-life-science-2.0/section/11.41/primary/lesson/nerve-cells-and-nerve-impulses-ms-ls
Answer:
When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. ... The binding allows the nerve impulse to travel through the receiving neuron
When does the separation of homologous chromosomes occur? A. Before Meiosis B. Meiosis 1 C. Meiosis 2 D. After Meiosis
Answer:
the answer would be c meiosis 2
Answer:
B. Meiosis 1
Explanation:
Just took the test
Answer the question
Who were the scientists that came up with the shape of DNA?
Watson and Crick
Crook and Brown
O Gregory and Mendel
7
O None of the above
If an egg is fertilized and the embryo implants itself in the uterus, the ovaries will stop producing new eggs. Explain how the ovaries are signaled to stop egg production.
Answer:
Six to 10 days after fertilization, the embryo attaches, or implants, itself into the lining of the uterus. During the next week or so, the embryo receives its nourishment and oxygen from the cells that make up the lining of the uterus. The two layers of cells become more pronounced.
Question 16 of 36
Following a sports injury, while the team physician is testing the stability of the lower leg it
slides forward unnaturally. This injury can be explained by a tear to the
A. Medial collateral ligament
B. Posterior cruciate ligament
C. Anterior cruciate ligament
D. Medial meniscus
E. Lateral collateral ligament
What are the three basic components of a nucleotide?
O Phosphate group, ribose and nitrogenous bases
O Adenine, thymine, and cytosine
O Oxygen, hydrogen and phosphate
O None of the above
Answer:
phosphate group ,ribose and nitrogenous bases
Compare and contrast genetic engineering to the process of natural selection. Select all statements that
are true.
tinn aonetic engineer
Answer:
Explanation:
Genetic engineering is faster than the process of natural selection.
Natural selection is natural process and it works over generations, while genetic engineering involves desired modification of traits.
Both genetic engineering and natural selection work on all organisms, including humans.
Which structure is found in both plant and animal cells?
Answer:
Cell membrane
Explanation:
Cell membrane is found in both animal and plant cells
What is the difference between chromosomes
and chromatin?
A. the genetic information in it
B. the location in the cell
C. the structural form
D. the base pairs
3. In the mid 1970s, Sherwood Rowland and Mario Molina predicted a thinning of the stratospheric ozone layer over Antarctica. The thinning was confirmed in the late twentieth century and has continued into the twenty-first century. (a) Identify the class of chemical compounds that is primarily responsible for the thinning of the stratospheric ozone layer and describe TWO major uses for which these chemicals were manufactured. (b) Describe how the chemical compounds that you identified in part (a) destroy stratospheric ozone molecules. You may include chemical equations as part of your answer. (c) Identify the major environmental consequence of the depletion of stratospheric ozone and describe TWO effects on ecosystems and/or human health that can result. (d) Ozone formed at ground level is a harmful pollutant. Describe TWO effects that ground-level ozone can have on ecosystems and/or human health.
Answer:
Chlorofluorocarbon.
Explanation:
Chlorofluorocarbon is the chemical compound that is responsible for the thinning of ozone layer present in the stratosphere. This Chlorofluorocarbon is used in the refrigerators and aerosol sprays. The major environmental consequence of the depletion of stratospheric ozone is the melting of glaciers in the Antarctica. It also has adverse effect on humans because it is responsible for the skin cancer disease in humans. Breathing ground-level ozone can trigger a variety of health problems such as chest pain, coughing, throat irritation, and congestion.
True/False: Mark the following statements as true (T) or false (F). If the statement is false, correct it to make it a true statement. _____ The periosteum contains osteoblasts and osteocytes. _____ Osteoclasts secrete bone matrix. _____ Compact bone is the hard, outer bone. _____ Compact bone is composed of spicules called trabeculae. _____ Spongy bone houses red and yellow bone marrow. _____ Circumferential lamellae are located between osteons.
Answer:
Explanation:
1. False and should read as - The periosteum contains osteocytes and osteoclasts.
2. True - Osteoclasts secrete bone matrix.
3. True - Compact bone is the hard, outer bone.
4. False and should read as - Spongy bone is composed of spicules called osteons.
5. True - Spongy bone houses red and yellow bone marrow.
6. False and should read as - Perforating fibers anchor the endosteum to the superficial surface of a bone
You are an aquatic biologist studying a small lake. The stream that drains into this lake runs by croplands. You are detecting a pesticide called atrazine in the insects and worms that live in the lake. The predatory birds such as herons and egrets have very high concentrations of atrazine in their blood. The birds prey on the frogs and small fish. What condition best explains the high atrazine level in the birds?
The condition best explains the high atrazine level in the birds is biological magnification. The correct option is D.
What is biological magnification?Biological magnification is the occurrence of any chemical in the body of a living organism than in outer space or the environment. The chemicals can be toxins or pesticides. They are present within the tolerant level in the tissue.
Here, the atrazine level is high in frogs and small fish than in the surrounding water, which is going in birds.
Thus, option D. biological magnification is correct.
The full question is attached in the image below:
Learn more about biological magnification, here:
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Why are certain amino acids called essential amino acids?
An mRNA sequence reads: GAA/GCU/AUA/CUA/UGU. What would the effect on the amino acid be if the second codon read GCA instead, and the third codon read AAU ?
A) Silent mutation on both, no changes whatsoever.
B) Silent mutation on second codon, third amino acid changed from PHE to STOP
C) Silent mutation on AAU only. Third amino acid is now HIS
D) Silent mutation on second codon, third amino acid changed from ILE to ASN.
Answer:
D) Silent mutation on second codon, third amino acid changed from ILE to ASN.
Explanation:
Silent mutations are usually point mutation where you change one nucleotide. Since, the nucleotide changed is the third position, it does not affect the protein being manufactured (it will still put the amino acid Ala) [look up the codon redundancy on youtub.e to understand how awesome nature is!]
On the other hand, the other mutation introduced is Missense mutation where a different Amino acid is added due to change in codon (goes from ILE to ASN).
The table describes the properties of four compounds.
Which compounds are most likely ionic?
Explanation:
where is table...add pic
Answer:
the answer was A and D
Explanation:
here is a pic
Length of Day (how does it affect plants)
Day length helps plants to regulate their internal clock
source: g00gle
Answer:
When the day length is fewer than 10 hours, most plants do not grow. Even if the temperature is kept within the ideal range — say, in a climate-controlled greenhouse — most plants will go dormant until the magical 10 hours of sunshine per day arrives.
Explanation:
Answer the following questions in your own words and in 3-5 complete sentences.
1. Where are the highest concentrations of the current population of Palmer amaranth?
2. Based on the climate model, how will the range change by 2050?
3. What do you think this change will mean for Palmer amaranth populations?
industrial preparation of oxygen from liquify air
Can someone help me with this, please?
What are the eight major mineral groups?
Answer:
calcium, iron, magnesium, potassium, chloride, zinc, sodium, sulfur
Explanation:
When an enzyme becomes denatured, what often happens to the rate of reaction?
A. Rate of reaction increases
B. Rate of reaction stays the same
C. Rate of reaction decreases
Answer:
C
Explanation:
After a certain temperature, the reaction rate decreases because the heat starts to denature the enzyme so that it no longer can function.
Answer:
C. Rate of reaction decreases
Explanation:
As an enzyme becomes denatured, the rate of reaction decreases.
Which of the following is a job for a landscape architect?
planning a municipal park
conserving land on traditional farms
operating machinery on crops
cutting down trees on private land
Answer:
1 do i of
Explanation:
Answer:
Planning a municipal park
Explanation:
Landscape architects are dedicated to building squares, parks, places mainly for a public purpose.
the four main types of macromolecules are organic. what does organic mean in this context.
A. it is made only of carbon
B. it is produced without the use of pesticides.
C. it is a very large molecule.
D. it is made from or produced by a living organism.
what factor is often responsible for the other three
1 increase in levels of toxins in freshwater
2 increased poverty and malnutrition
3 increase in human population
4 increased depletion of finite resources
Answer:
I think it's 4 hope it's correct
What evolutionary feature will you expect to see in the tortoises on the island?
Answer: The most expectant evolutionary feature would be longer necks. This will enable the tortoises to reach the higher grass. This would occur through natural selection that would favor the extreme traits (alleles of long neck) of long necks in the population.
Explanation:hope it helps you
Answer:
The evolutionary feature you will expect you see in the tortoises on the island is longer necks.
Explanation:
Longer necks will be able to occur through natural selection. Tortoises would be able to reach for higher grass when grass isn't available from lower. This is a favorable trait.
Which would NOT likely be used as evidence of evolution?
Answer:
what is there to pick from?
Explanation:
The option that does not provide evidence that living things have been evolving for millions of years is intelligence. The correct option is C.
What is evidence?In science, evidence refers to any observations, measurements, or facts that support or refute a hypothesis or theory.
Intelligence is not a factor that provides evidence for evolution. The process of evolution is driven by natural selection, genetic mutations, and other biological factors, not intelligence.
On the other hand, the other answer choices are all factors that provide evidence for evolution:
(A) Fossil record: provides evidence of changes in species over time.
(B) Natural variation within a species: provides the raw material for evolution to act upon.
(D) Homologous structures of living organisms: provide evidence of common ancestry and evolution over time.
(E) Similarities in embryological development: provide evidence of shared evolutionary history and common ancestry.
Thus, the correct option is C.
For more details regarding evolution, visit:
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Your question seems incomplete, the probable complete question is:
Which would NOT likely be used as evidence of evolution?
(A) fossil record (B) natural variation within a species (C) intelligence (D) homologous structures of living organisms (E) similarities in embryological development
is it more beneficial for humans to undergo sexual reproduction than asexual reproduction?
Answer:Advantages and disadvantages of sexual and asexual reproduction
Sexual reproduction involves two parents and the joining of male and female gametes during fertilisation. The offspring inherit a mixture of genes from both parents, so are different to each other and their parents.
The advantages of sexual reproduction:
produces genetic variation in the offspring
the species can adapt to new environments due to variation, which gives them a survival advantage
a disease is less likely to affect all the individuals in a population
In asexual reproduction there is only one parent. The offspring are clones of the parent and each other.
The advantages of asexual reproduction include:
the population can increase rapidly when the conditions are favourable
only one parent is needed
it is more time and energy efficient as you don't need a mate
it is faster than sexual reproduction
The disadvantages of sexual reproduction:
time and energy are needed to find a mate
it is not possible for an isolated individual to reproduce
The disadvantages of asexual reproduction include:
it does not lead to genetic variation in a population
the species may only be suited to one habitat
disease may affect all the individuals in a population
Examples in the natural world
Bacterial reproduction
Bacteria, such as E. coli, reproduce asexually. An advantage of this is that they can produce many bacteria very quickly. A disadvantage is that all of the bacteria are genetically identical. If an antibiotic was used on the bacteria, then all of them would die. The population would be wiped out. The only way for variation to be introduced into the population is by random mutation.
Rabbit reproduction
Most animals reproduce sexually, for example, rabbits. The process of sexual reproduction introduces variation into the species because the alleles that the mother and the father carry are mixed together in the offspring. A disadvantage is that sexual reproduction takes longer than asexual reproduction. A mate must be found, the egg must be fertilised by sperm, and then the offspring develop. The benefit of introducing genetic variation into the species, however, outweighs this disadvantage. If a disease were to hit the rabbit population, then perhaps not all of the rabbits would be affected because of the variation in the population. This means that some individuals would survive and be able to reproduce and generate more offspring.
Asexual and sexual reproduction in fungi
Some fungi are able to reproduce both sexually and asexually. Fungi reproduce using spores which they release into the environment. A new fungus will grow from the spore. The Coprinus cinereus fungus can produce spores by sexual reproduction to help create variation in the species. This method of reproduction is advantageous when the environment is changing because the variation introduced leads to an increase in the probability that a variant that can deal with the change. Coprinus cinereus also produces spores by asexual reproduction. These spores can be produced quickly and in large numbers to enable many individual fungi to develop. A disadvantage of these spores is that they generate offspring that are unlikely to be resistant to unfavourable conditions because they are all genetically identical.
Common inkcap mushrooms
Some mushrooms can carry out both asexual and sexual reproduction depending on their environment
Explanation:spores can be produced quickly and in large numbers to enable many individual fungi to develop. A disadvantage of these spores is that they generate offspring that are unlikely to be resistant to unfavourable conditions because they are all genetically identical.
Common inkcap mushrooms
Some mushrooms can carry out both asexual and sexual reproduction depending on their environment