Answer: The similarities between shark and whales are indicative of convergent evolution.
Explanation:
Convergent evolution can be defined as the process in which the organisms are not closely related but they evolve similar traits as a result of living in a similar kind of environment or adapting traits which enable them to perform the same ecological niches.
The similarities between shark and whale is indicative of convergent evolution as the animals are not related to each other phylogenetically but they live in the same environment this they evolve same kind of traits.
The similarities between sharks and whales represent an example of convergent evolution.
Convergent evolution refers to the evolution of similar phenotypic traits in unrelated and/or distantly related species.Convergent evolution creates analogies, i.e., different structures that may have the same function but were not present in the last common ancestor of both species. On the other hand, divergent evolution refers to the development of dissimilar phenotypic traits in closely related species as a result of evolution by natural selection, thereby leading to speciation.In convergent evolution, similar phenotypic features (traits) have evolved independently and repeatedly in each lineage in order to adapt to particular environmental conditions.In conclusion, sharks and whales are an example of convergent evolution because they are distantly related species that exhibit similar phenotypic features in the same environment.
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When pathogens are ingested by the macrophages and dendritic cells of the immune system, they are digested and a small portion of the pathogen, __________, is attached to the surface of the macrophage.
Answer:
Antigen
Explanation:
on the surface of the pathogen that helps immune cells identify then
When pathogen are swallowed by the immune system's macrophages and dendritic cells, they are digested and a small amount of the pathogen's antigen is attached to the macrophage's surface.
What is antigen?
Any chemical that triggers the body's immune system to react negatively to it. Toxins, chemicals, germs, viruses, and other things originating from the outside of the body are examples of antigens.
In reaction to exposure to antigens, B cells of the immune system create Y-shaped proteins known as antibodies (immunoglobulins).
Antigen receptors, such as antibodies and T-cell receptors, are responsible for recognizing antigens.
Immune system cells produce a variety of antigen receptors, giving each cell a specificity for a single antigen.
Therefore, antigen is attached to the surface of the macrophage.
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One recent approach to vaccine development has been production of peptide vaccines. In these vaccines, antigenic peptides are injected instead of whole bacteria or viruses. Peptide vaccines have not been particularly useful against viral pathogens because viral infections require a CD8+ T cell mediated immune response. Why is a peptide vaccine unable to create such a response?
Answer:
Explanation below
Explanation:
Immunization is the process of protecting the body from infections. This can be divided into two, namely
1. Natural immunization
2. Artificial immunization
Natural immunization is the one that is being developed by the body naturally, to protect the body from infections. This is usually known as the white blood cells.
Artificial immunization is being developed through the introduction of atenuated organisms into the body, so that the body can react by producing antibodies against that infectious organisms. This is known as vaccination.
The peptide vaccines have been developed for the body to be able to produce antibodies against some infections.
It should be noted that, owing to the relatively small size of peptides, they are often weakly immunogenic by themselves and therefore require carrier molecules, to add chemical stability and adjuevating for the induction of a robust immune response.
Which of the following best describes the long-term impact of using a nonrenewable energy source? (1 point)
A. Geothermal energy can disrupt the water table and damages groundwater.
B. Burning biomass to produce energy releases greenhouse gases.
C. Petroleum releases carbon dioxide and pollutes water supplies.
D. Nuclear power damages the atmosphere by producing air pollution,
how much food is required for a blob to reproduce from one generation to another
A: 1
B: 2
C: 3
D: 4
Answer:
Reproduction is achieved from a single cell type, if the organism itself consists of many cell types because each cell that reproduces has a similar DNA in an organism.
A blob to reproduce from one generation to another is option "A" which is 1.
Reproduction is achieved from a single cell type if the organism itself consists of many cell types because each cell that reproduces has a similar DNA to an organism.
What is reproduction in living things?
Reproduction occurs when an organism makes a copy of DNA and produces offspring. All living things on Earth are a process of reproduction.
Thus, option "A" is 1.
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Which kingdom has members that lack major organelles such as endoplasmic reticulum, mitochondria and Golgi bodies?
A) Bacteria
B) Protist
C) Fungi
D) Plantae
Answer:
A, Bacteria
Explanation: Prokaryotic bacteria are very simple and lack organelles like ER, mitochondria, Golgi, etc.
how coffee affects protein digestion?
Answer:
one of the main ways coffee causes gas as undigested, putrefying protein is feed on by the intestinal bacteria that create hydrogen sulfide (rotten egg gas) for those really smelly farts.
Explanation:
does that help you???
3. Bonds formed by _____ hold a DNA double helix together. Carbonoxygennitrogenhydrogen
Answer:
hydrogen bonds
Explanation:
The single largest threat against a river ecosystem is ___________.
a) pollution
b) silt
c) muttering
d) ransom
e) estuary
Answer:
a) pollution
Explanation:
Multiple environmental stressors, such as agricultural runoff, pollution and invasive species, threaten rivers that serve 80 percent of the world's population. These same stressors endanger the biodiversity of 65 percent of the world's river habitats putting thousands of aquatic wildlife species at risk.
cell growth occurs in what phase
Answer:
For a typical dividing mammalian cell, growth occurs in the G1 phase of the cellWhich best describes the ovary?
it produces progesterone.
it is the organ in which a fertilized egg grows.
it produces testosterone.
it is the location for egg fertilization.
The option that best describes an ovary is that is produces progesterone.
Functions of ovaryThe ovary is part of the female reproductive system and they are two oval-shaped organs that lie to the upper right and left of the uterus.
The three main functions of the ovary are
they secrete hormones, they protect the eggs a female is born with and they release eggs for possible fertilization.The hormones secreted by the ovary are the female hormones oestrogen and progesterone.
Progesterone functions mainly to regulate the condition of the inner lining (endometrium) of the uterus.
Therefore, the option that best describes an ovary is that is produces progesterone.
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Answer:
A. it produces progesterone.
Explanation:
i took the quiz!
Which of the following is a product of photosynthesis?
a. carbon dioxide
b. sugar
c. sunlight
d. water
Answer:
B. Sugar
Explanation:
Sugar, or glucose, is the main product of photosynthesis. It is the reason why photosynthesis occurs, as plants use glucose as food or a source of energy. Sunlight, water, and CO2 are all components of making glucose, not products. Another product of photosynthesis is oxygen, which we then use in turn for cellular respiration.
Answer:
I don't see it on there but I think you're missing an option
Explanation:
-The answer to this is oxygen
(glucose sugar could also be correct depending on what your question looks like)
Name the system- name as many human body systems as you can. ( don’t use internet)
Answer:
integumentary
circulatory
nervous
lymphatic
skeletal
muscular
Explanation:
im so sorry this all i know from the top of my head
You have learned about how to sample a population and estimate size from density. In this
activity, you will: construct a model of a population, sample the population to determine its
density, then use its density to determine its size.
Part One: Construct the Model
Materials
1 piece of 8.5 by 11 in. letter paper
1 pen or pencil
1 ruler
50 small dry beans or other small objects such as buttons
1 small cup
Directions:
1) Use your pen or pencil and ruler to divide the paper into four equal sections.
2) Place the 50 beans into a small cup.
3) Scatter the beans as evenly as possible over the entire paper, making sure to get some of
the beans into each section.
Student Name:
Modeling Population Size
Part Two: Use the Model to Estimate the Size of the Population
In your model, each bean represents a starfish and the paper represents its ocean floor habitat.
1) Within the habitat, choose one of the four sections and count the number of starfish in that
section.
2) Use your ruler to measure the dimensions of the section you chose and calculate the area
that you sampled.
3) Calculate population density based on your sample.
4) Use your ruler to measure the dimensions of the entire habitat and calculate the total
habitat area.
5) Use your calculated population density and total area to estimate total population size.
6) Compare this estimation to your known population size (50). Did you under‐ or
overestimate based on your sample?
What is the sign of the damage when a plant is infected with aphids?
A chewed leaves
B light powder on leaves
C rusty spots on leaves
D twisted leaves
can someone explain what the questions mean i will mark brainliest
Answer:
What happened during the growth of your seedling to effect how it has grown?
What kind of energy (sun-light, water, soil nutrients) contributed to the growth and development of your seedling?
Explanation:
This is how I interpret what the question means. I hope this helps.
Which classification is the most specific and also represents part of the organisms Latin name?
A) Domain
B) Phylum
C) Species
D) Class
Answer:
C- species is most spesific
do you think you can answer this?
Imagine that you are a genetic counselor working with the first daughter in the last generation of the pedigree shown. She is married to a man with no history of ald in his family. The couple plans to have children and they want to know the chance of their first child having ald. How will you advise them?.
The chance of your first child having ald is 25%.Becose the adl gene may be recessive in this family.
How to advise them on family genetics?Recessive genes produce proteins considered “defective” as they become inactive. That is, they are hidden (recessive) with the presence of a dominant gene manifesting their characteristics in the absence of their dominant allele. The adl gene may be recessive in this family.
With this information, we can conclude that the chance of your first child having ald is 25%.
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Organisms that do not have a membrane-bound nucleus are called:.
Answer:
Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.
Which tool is used to detect yellow light rays emitted by stars from outer space?
Answer:
the Hubble space telescope
Explanation:
an explanation of a natural phenomenon supported by many observations and experiments over time
Answer:
Explanation of a natural phenomenon, supported by many observations and experiments over time, corresponds to a scientific theory.
Explanation:
A scientific theory begins with the observation of a natural phenomenon and the formulation of a hypothesis that explains its existence, which must be proven through observation and experimentation.
The approach of a theory follows the scientific laws and must be established on the basis of rigorous experimentation and measurement, establishing a relationship between what is observed and what can be proven, in such a way that a theoretical principle is elaborated to provide an explanation of the phenomenon.
A theory is subject to the scrutiny of the scientific community and can be refuted, when other data or experiments appear to oppose it. When the argument of a theory cannot be refuted, and is universally accepted, it becomes a scientific law.
which of the following would be considered genetic engineering
A. spraying a field with pesticide
B. crop rotation
C. changing the DNA of a crop plant to make it resistant herbicides
D. releasing ladybugs on a field to eat pest insects
C, changing the DNA of a crop to make it resistant to herbicides :)
Changing the DNA of an organism is engineering its genetics.
Changing the DNA of a crop plant to make it resistant herbicides would be considered genetic engineering. So, the correct option is C.
What is genetic engineering?The technological modification and manipulation of an organism's genes is known as genetic engineering, often referred to as genetic modification or genetic manipulation.
Genetic engineering is the addition, removal, or repair of a portion of the genetic material (DNA), which alters the phenotypic of the organism, to alter the genetic information of living organisms. It is also referred to as recombinant DNA technology or gene modification (r-DNA Technology). Genetic engineering would entail altering a crop plant's DNA to make it resistant to herbicides.
Thus, the correct option is C.
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Golgi apparatus meaning
Answer:a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transpor
Explanation:
Answer:
a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
happy to help
Explanation:
please help! will give brainliest :))
Answer:
#A
Explanation:
Answer:
A, D, B
Explanation:
All have layers protecting the inside.
Select the statement that is true.
1.) Sexual reproduction requires a single parent.
2.)Asexual reproduction is a simpler process than sexual reproduction
3.) Asexual reproduction occurs when two gametes fuse.
4.)Sexual reproduction produces more o
offspring than asexual reproduction.
Answer:
2) Asexual reproduction is a simpler process than sexual reproduction.
Asexual reproduction is a simpler process than sexual reproduction is a true statement.
What is Asexual reproduction?Asexual reproduction refers to a form of reproduction that excludes the joining of gametes or sex cells. Asexual reproduction does not require the mating of male and female gametes, as sexual reproduction does, in order to produce children.
The creature may reproduce even in the absence of a mate, producing young that are typically clones of their parents. Binary fission, budding, vegetative reproduction, spore formation (sporogenesis), fragmentation, parthenogenesis, and apomixis are the several asexual reproduction processes.
Asexual reproduction is a process used by bacteria, archaea, many plants, fungi, and certain mammals.
Therefore, Asexual reproduction is a simpler process than sexual reproduction is a true statement.
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NEED HELP!
Why would the shrimp in the ecosphere die if there was no sunlight?
Answer:
The shrimp would die wthout sunlight because they eat algae and algae live on the water's surface. Algae undergo photosynthesis and for photosynthesis to occur, sunlight is necessary. If there is no sunlight, there is no algae. And without the algae around the shrimp no longer have anything to eat. Therefore, without the sunlight (and algae) the shrimp will not be able to survive.
Explanation:
^
If two organisms have similar rrna sequences, you can conclude that they.
Answer:
evolved from a common ancestor
Explanation:
If two organisms have similar rRNA sequences, you can conclude that they: evolved from a common ancestor.
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A natural hazard is a natutrully occuring event that has an effect on the?
Answer:
enviroment
Explanation:
Answer:
has an effect on humans i think
What element can be found in proteins but not lipids
Answer:
Proteins, carbohydrates and lipids are made from three basic molecules: carbon, hydrogen and oxygen. However, all proteins contain an element not found in carbohydrates and lipids is nitrogen. Nitrogen which is present in all amino acids (the building blocks that make up the protein chains).
Because their role is to move the eyeball, all of the extrinsic eye muscles have insertions on the ______.