Answer:
a common ancestor that used these structures to perform one or more specific functions
Explanation:
A vestigial structure is an organ that has no obvious function in an organism, but it has been used by a past ancestor to perform one or more specific functions. Thus, vestigial structures have been retained in the course of evolution, but they lost their ancestral functions. Vestigial structures/organs can be detrimental for the organism because it is required energy to maintain them and they may suffer diseases (e.g., cancer). Some well-known examples of vestigial organs/structures include, among others, the wings of ostriches and cormorants, the human appendix, etc.
What is meant by trophic levels?
Answer:
The position it holds in the food chain
Explanation:
A food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves.
Which of the following best describes a career in Genetic Technology?
a. Athena uses a sophisticated telescope to observe stars
b. Zach tracks the number of fish that inhabit a certain coastal sea
c. Vincent modifies the DNA of bacteria to study function of their genes
d. Lindsey writes computer programs that models the 3-D structure of chemicals.
Answer:
c. Vincent modifies the DNA of bacteria to study function of their genes
Explanation:
DNA is wrapped around
and condensed into chromosomes.
• Genes are used as a set of instructions to produce proteins.
Proteins affect the
and function of organisms.
Chromosome
Answer:
- DNA is wrapped around nucleosomes and condensed into chromosomes.
- Proteins affect the traits and function of organisms.
Explanation:
Nucleosomes are the basic unit of compaction of DNA. Each nucleosome is composed of ~148 bp double-stranded DNA and an octamer of histone proteins, which include two molecules of each core histone: H2A, H2B, H3 and H4. Subsequently, nucleosomes are packaged into chromatin fibers so they can be densely compacted into chromosomes. On the other hand, proteins are molecules that play important (structural and enzymatic) functions in a cell. These proteins may affect the structure/function of a cell, thereby affecting a certain characteristic/trait to develop.
In a scientific investigation, after the question is defined, the next step is most likely which of
the following statements?
A. Collecting the data
B. Formulating a hypothesis
C. Designing the experiment
D. Identifying materials needed
In a scientific investigation, the next step after the question is defined is to formulate a hypothesis. A hypothesis is a testable explanation or a prediction. Therefore, the correct option is B.
What is Hypothesis?A hypothesis is the proposed explanation for a phenomenon. For a hypothesis to be scientific, the scientific method requires one to test it. Scientists generally form hypothesis on the basis of scientific hypotheses of previous observations that cannot satisfactorily be explained with the available scientific theories.
Types of hypothesis include simple hypothesis, complex hypothesis, and directional hypothesis.
After the question has been defined, the next step taken by a researcher is to form a hypothesis, or testable explanation. It is about making predictions based on the hypothesis and further test the prediction.
Therefore, the correct option is B.
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A moon has less mass than a star and more mass than a planet it orbits.
•True
•False
A doctor examines a patient who has high blood pressure and atherosclerosis in the coronary artery. What medical condition connected to blood flow is most likely to affect this patient in the future?
A. The patient may develop headaches and confusion due to cancer in the brain caused by years of low levels of oxygen supplied to the brain.
B. The patient may develop stiff joints and chest pains from the high blood pressure applied to the muscle and joint tissues of the body.
C. The patient may show signs of confusion, weakness, and partial paralysis due to high blood pressure when the plaque dislodges and blocks blood flow to the brain.
D. The patient may suffer a heart attack because of the reduction in blood flow to the muscles due to severe plaque build-up in the coronary artery.
Explain why this is the correct answer and why the other ones are wrong:
Which organ is shaped like a small balloon and is located in the space between your hip bones
Answer:
bladder
Explanation:
Answer:
Bladder
Explanation:
The Bladder is shaped like a small balloon and is located in the space between your hip bones
Please help.................
Answer:
C i think.......................................
Women gives birth to a baby boy. A few years later she gives birth to another baby boy. What is the probability that her third child will be a girl? Play your reasoning
Answer:
50 %
Explanation:
It is given that a woman gives birth to a baby boy. Her second child is also a baby boy. Now she is about to give birth to her third child. We have to determine the probability of the child to be a girl.
Here, the probability of the child to be a girl would be 50 % or 1 out of 2.
There are two possibilities and the possibilities would result a boy child or a girl child. So there are two possible outcomes and is equally likely with each child birth.
Also each child birth is an independent event, so the probability that the one results will occur do not depend on the previous births.
Mitosis and meiosis are important parts of cellular reproduction. Select all the correct statements
about MEIOSIS.
Creates genetic variation
Produces gametes
Produces two daughter cells
Creates four, haploid daughter cells
Answer:
A is correct
B is correct
C is INcorrect
D is correct
Explanation:
Since there are two parents with different genes that produce new cells, and the fact that chromeosomal crossover accures very commonly in meiosis, there is genetic variation. So A is correct.
B is correct since gamates are haploid cells.
As I said above, gametes are haploid cells, not diploid. MITOSIS produces two identical daughter cells, known as diploid cells. This is not meisosis, which produces four haploid cells. So, C is incorrect since that is talking about MITOSIS. But knowing this, D must be correct since that is about meisois.
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I don’t have a lot of time please help!
No websites or links.
Don’t answer it if you don’t now. Thanks
What does "reliably" mean in these sentences?
Answer:
it would be the top right one
Answer:
in a way that can be trusted
Explanation:
hope this helps!
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In which ways might ocean currents be like streams and rivers on land
Answer:
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.
Ocean currents in different ways might be like streams and rivers on land they sweep along the predictable paths. Ocean currents flow at the surface, and flow deep within the waterbodies.
What are Ocean currents?Ocean currents act much like similar to a conveyer belt. Ocean currents transport warm water and precipitation of water from the equator towards the poles and cold water from the poles back to the tropics of the globe. Thus, the currents which regulate global climate, helping to counteract the uneven distribution of solar radiations reaching to the Earth's surface.
Ocean currents flow like that of vast rivers, sweeping along with the predictable paths. Some of the ocean currents flow at the surface and others flow deep within the water. Some ocean currents flow for very short distances, however others cross entire ocean basins and even circle the globe.
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What were the old women doing?
In Percy jackosn
Answer:
If it is the scene that I think you're referring to, they were sitting in a group on rocking chairs, cutting yarn.
Explanation:
in Greek mythology, these women are the three Fates, named Clotho, Lachesis, and Atropos. In mythology, a thread represented someone's lifeline, and when the Fates cut your thread, it meant your life was over and you died.
In this specific scene, from The Lightning Thief, the Fates are seen cutting a blue piece of yarn, which makes Percy's friend Grover nervous because he believes they've just cut Percy's lifeline.
c) Explain why wheat is not able to grow well in
nitrate poor soil.
Answer:
When soil available nitrogen is low, yield and protein content will be low. As nitrogen is applied beyond these levels the wheat plant will no longer use it to
Which are both forces?
A.) Work and Power
B.) Power and Gravity
C.) Gravity and Friction
D.) Friction and Work
(Need help this is due by 11:59 tonight!)
Answer:
I think that the answer might be C. Gravity and Friction
please answer this question asap!!!!
Answer:
The 2ND one and the 4th one I'm pretty sure
Which plant structure absorbs most of the water and nutrients needed from the soil? tap roots secondary roots root hairs fibrous roots
Answer:
Root hairs
Explanation:
This is because the root hairs are part of root structure that are tubular and have lateral enlongations.
The root hairs increase the surface area of the root and allow for exchange.
They gave direct contact with the soil and then absorb water and nutrients to their increased surface area.
The fact that choanoflagellates and collar cells of sponges resemble each other supports the inference that ________. Group of answer choices choanoflagellates are animals choanoflagellates are more closely related to sponges than they are to protists choanoflagellates and sponges evolved similar cell structures through convergent evolution choanoflagellates and sponges are sister groups
Answer:
choanoflagellates and sponges are sister groups
Explanation:
The choanoflagellates are small unicellular organisms belonging to the Protista kingdom. These microorganisms are collared flagellates morphologically similar to the choanocyte cells of animal sponges, which have a central flagellum surrounded by a collar of microvilli. In consequence, it has been suggested that choanoflagellates may represent the closest living relatives of primitive metazoans (i.e., they are sister groups to sponges). This hypothesis has recently been supported by both molecular phylogenetic and comparative genomic analyses.
what is an indication that water is entering a cell?
Answer:
water decreasing from where it came from
Explanation:
that or the cell starts to swell
Find the measure of 3.
I will Mark you Brainliest for the quickest and correct answer Please help O really need you help
AND NO LINKS PLEASE Rainforestowl PLEASE I AM TALKING TO YOU
Answer:
it controls which substances enter and leave the cell
Explanation:
Answer:
may be the strength and stiffness
1. Which of these physical trait(s) did
scientists claim were connected to
certain behavioral trait(s)?
Answer:
It turns out that the body color and wing length genes are linked, which means they are located very close to each other on the same chromosome. In addition, if two genes are linked in this way, then gametes are more likely to contain specific allele combinations.
Explanation:
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What are 5 differences between prokaryotic and eukaryotic cells?
Answer:
Go to science.org and type your question up, they have plenty of diagrams and i used it to ace all of my bio quizzes.
Explanation:
Hope this helps! Have a great day!
What is Florida’s most popular gamefish
Answer:
Sailfish
Explanation:
One of Florida's most popular gamefish is the Sailfish.
where does mold come from?
The cell or "plasma" membrane is described as a Fluid Mosaic Model. Can you explain what
this means?
Answer:The fluid mosaic model describes the cell membrane as a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving. This movement helps the cell membrane maintain its role as a barrier between the inside and outside of the cell environments.
Explanation:
Answer:
The fluid mosaic model describes the cell membrane as a tapestry of several types of molecule
Explanation:
Why do you think that some vaccines, such as the flu vaccine, need to be given every year?
Answer:
Because flu viruses evolve so quickly, last year's vaccine may not protect you from this year's viruses. New flu vaccines are released every year to keep up with rapidly adapting flu viruses.
Answer:
Because the virus/sickness would evolve and that vaccine might not protect you.
refer(s) to an individual's preference for emotional sexual relationships with members of the opposite sex (heterosexuality), the same sex (homosexuality), or both (bisexuality). A) Sexism B) Gender identits C) sexual identification D) Sexual orientation
Answer:
D. Sexual orientation
Explanation:
Hope this helps! Have a nice day!
This is a question that has been confusing - In addition to carbon dioxide, what other two ingredients does a plant need for photosynthesis?
Answer:
Carbon dioxide, water and sunlight
Answer:
water and sunlight
Explanation: