The nervous system is primarily composed of what type of cells?
A stem cells
B white cells
C skeletal muscle cells
D neurons
Answer:
D. Neurons
Explanation:
Nervous tissue is composed of two types of cells, neurons and glial cells. Neurons are the primary type of cell that most anyone associates with the nervous system. They are responsible for the computation and communication that the nervous system provides.
Answer:
D. neurons
Explanation:
Is there a way to know any test exam style questions for 9th grade biology because biology is a very complex subject and lots of information to learn and I want to study the key details thanks:D
Match the structure with the correct type. A structure type may be used more than once. 35.bat wing and mouse arm_____A. homologous structure 36.reptile foot and bird foot ____B. analogous structure 37.dolphin fin and fish tail ____C. vestigial structure 38.eves on a blind cave fish ____ 39.snake tongue and dog nose ____
Answer:
35. A. homologous structure
36. B. analogous structure
37. B. analogous structure
38. C. vestigial structure
39. B. analogous structure
Explanation:
A homologous structure is a similar structure/trait found in different species because they diverged (evolved) from a common ancestor, i.e., these species share a common ancestor that had the homologous structure/trait. A homologous structure may have the same or different functions in the descendants. Conversely, an analogous structure is a similar structure/trait that evolved independently (i.e., by convergent evolution) in different species to have the same function, thereby these species don't share a common ancestor with the trait. Finally, a vestigial structure is a rudimentary biological structure found in an organism that has lost its original/ancestral function (e.g., the appendix in humans or the hindlimbs of the snake). Vestigial structures provide strong evidence for evolution by use/disuse of body parts.
Homologous and Analogous structures differentiate in origin and function. Vestigial structures have lost their function. A) Homologous, B) analogous, C) analogous, D) vestigial, E) analogous.
What is an homologous structure?Homologous characters are the structures of different organisms that,
are composed of the same basic elements. share the same position in the body and the same relationship with adjacent structures.share the same embryological development.These structures might express some variations between the organisms that might be related to their function and to the environment. Their function is not necessarily the same in all the organisms involved.
These homologous characters are present in organisms related that share a common ancestor.
What is an analogous structure?Analogous structures are those body parts of different organisms that accomplish the same function, but they are originated from different areas. These structures do not share the same origin.
What is a vestigial structure?Vestigial structures are those body parts, genetically determined, that have been retained during the evolution of the taxonomic group but have lost or reduced their original function.
Such vestigial structures were plenty functional in the ancestors of new species, but now are typically degenerate, stunted, or rudimentary, and tend to be much more variable than homologous non-vestigial parts.
According to these definitions, we can answer the questions.
bat wing and mouse arm_homologous structure_reptile foot and bird foot _analogous structure dolphin fin and fish tail _analogous structure_eyes on a blind cave fish are _vestigial structure_ snake tongue and dog nose _analogous structure_You will learn more about homologous, analogous and vestigial structures at
https://brainly.com/question/1017285
https://brainly.com/question/882540
https://brainly.com/question/2882009
https://brainly.com/question/478049
https://brainly.com/question/1891149
Which of the following is a result of limiting weed growth through mulching?
A. lowers the need for herbicides
B. increases the amount of pests
C. lowers the amount of crops that can grow
D. increases the need for water
Answer: its B or D
Explanation: ihope this helps
The features of alveoli for the efficient exchange of gases.
A. Thin wall, moist layer and less blood vessels
B Thin wall, moist layer and more blood vessels
C. Thick wall, moist layer and more blood vessels
Explanation:
The alveoli are lined with mucus and are surrounded by a network of blood capillaries. They have very thin walls for gases to be absorbed through. An individual air sac is called an alveolus. The layer of moisture in the alveoli allows gases to dissolve so that they can diffuse quickly.
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Bacteria and other micro organisms grow and produce acids. Ravi’s mouth was
checked before and 1 hour after eating, at 15 minutes intervals. It was seen that
the environment inside the mouth was becoming more and more acidic, after
every 15 minutes.
a. Explain the reason for this.
b. Suggest the possible effects of this on the teeth.
c. How can you prevent this?
Answer:
hey
Explanation:
i think its because f the bacteria forming inside the moith due to food
the teeth can detiriorate and break down
by brushing daily
Answer:
check cbse textbook gr.7 pg19
care of teeth
Explanation:
just go check it jobless sreerag
1. Shifting from mechanical picking to hand picking results in which of the following improvements?
a. reduced labor cost
b. increased packing efficiency
c. reduced senescence
d. increased speed
Answer:
The answer is A
Explanation:
when two heterozygous individual are crossed,the proportion of the offspring that are true breeding for dominant trait is
Answer:
75%
Explanation:
If you drew a Punnett Square, you will see that the possible outcomes would be AA, Aa, aA, and aa. Three out of the four would exhibit the dominant trait.
What would you expect to occur if you were to repeatedly lift 25 pounds over your head for 1 minute, rest for 1 minute, and then repeat the exercise?
Put the following events in the correct order:
A. mRNA leaves the nucleus and goes into the cytoplasm
B. The DNA sequence is copied to the mRNA sequence during transcription
C. Proteins determine our traits
D. Ribosomes read the mRNA and create a chain of amino acids
Answer:
the correct order is B,A,D,C
If H X G means H is to the South of G
H + G means H is to the North of G
H ÷ G means H is to the East of G
H-G means H is to the West of G
Then, in A÷ B +C-D; D is in which direction with respect to B.
a)North
b)South
c)North-East
d)South – East
Answer:
C. North-East
Explanation:
North" (and any subsequent words) was ignored because we limit queries to 32 words.
can people see solar winds?
Answer:
Yes
Explanation:
astrophysicists can now see the solar wind with their own eyes.
which process uses carbondioxide present in the air
a.burning of fossil fuels
b.production of glucose
c.asimillation in animals
d.breakdown of organic matter
Answer:
a.burning of fossil fuels
Answer:
b.production of glucose
A researcher stimulates, with a small electrical charge, a portion of a cat's limbic system. The cat suddenly jumps and acts as if it is fighting. What portion of the limbic system was stimulated
Answer: amygdala
Explanation:
The limbic system, refers to the set of brain structures that's located on the sides of the thalamus. The function of the limbic system include olfaction, behavior, emotion, and long-term memory.
Since the cat suddenly jumps and acts as if it is fighting, the portion of the limbic system that was stimulated is the amygdala.
Explain how sampling methods are used in ecological studies
Answer:
When using random sampling techniques, large numbers of samples/records are taken from different positions within the habitat. A quadrat frame is most often used for this type of sampling.
¿Cómo puede el río cambiar el lugar de la topografía?
Answer:
Los mapas topográficos utilizan el sistema de representación de planos acotados, mostrando la elevación del terreno utilizando líneas que conectan los puntos con la misma cota respecto de un plano de referencia, denominadas curvas de nivel, en cuyo caso se dice que el mapa es hipsográfico.
Explanation:Además de los campos mencionados anteriormente, la topografía es fácilmente aplicable a cualquier trabajo o proyecto donde se necesite realizar planos, obtener datos de un terreno y ubicar puntos en la superficie terrestre con gran precisión y rigurosidad técnica.Es posible determinar la posición de un punto sobre un plano horizontal: a partir de un solo punto conocido, por levantamiento de poligonales , un método que consiste en medir distancias horizontales y azimut a lo largo de una línea quebrada (ver Sección 71);
A cut parallel to the midsagittal plane would produce a ________ section. A cut parallel to the midsagittal plane would produce a ________ section. parasagittal superior frontal transverse coronal
make a list of social norms being practiced in your family and community
Answer:
conservation of public properties
respecting senior
love junior
helping person of societies in need.
participating in the religious functions of neighbors.
What is the purpose of mitosis?
Answer:
Mitosis creates more diploid cells by copying each chromosome and moves it to the other side of the cell.
Explanation:
This lets the cell get divided straight down the middle.
how is human population dealing with air pollution?
what is photo synthesis ?
[tex]\sf\purple{Photosynthesis}[/tex] is a process by which phototrophs convert light energy into chemical energy.
The word “photosynthesis” is derived from the Greek words "phos" (which means “[tex]\sf\pink{light}[/tex]”) and "σύνθ-εóîς" (which means “[tex]\sf\red{combining\:together}[/tex] .”) And so it means “combining together with the help of light.”
The process of photosynthesis occurs in green plants (the primary producers in a food chain) and a few other autotrophic organisms such as cyanobacteria, purple bacteria and green sulfur bacteria.
Following is the photosynthesis formula:
6 CO2 + 6 H2O —> C6 H12 O6 ([tex]\sf\blue{glucose}[/tex]) + 6 O2 ([tex]\sf\pink{oxygen}[/tex]).
[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{.}}}}}[/tex]
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrition form carbon dioxide and water.
What can happen when a community becomes isolated from the rest of its species for many generations?
a) Competition between individuals will decrease.
b)The community will grow more slowly.
c)A new species can form.
d)There would be no effect on the community.
Answer:
C) A new species can form.
Explanation:
This is the concept of genetic drift, where a species being isolated gets an unnatural change in the gene pool, and thus can evolve differently.
number the steps for using a microscope to view a slide order from 1-11
can u zoom in cant see it
I need help once again!!
Answer:
I believe the answer is A. An organ system supports all parts of the organism.
Explanation:
This answer makes the most sense to me.
Write two functions of kidney.
Answer:
remove waste products from the body. remove drugs from the body. balance the body's fluids. release hormones that regulate blood pressure.
Which 'if any' of the following are true? Aquatic animals present a greater risk to divers than any other factor. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify. Because they are perceived as more aggressive, men are more likely to be the victim of an aquatic animal attack than women are. None of the above.
Answer:
B. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify.
Explanation:
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Which of the following lists contains organisms with different kinds of cells?
A earthworm, clam, insect, jellyfish
B. redwood tree, daisy, rose, bacteria
C. turtle, chicken, dolphin, salamander
D. tulip, daffodil, sunflower, oak tree
How do you think new proteins affect the fitness of children?
They have no effect on fitness
They increase fitness
They decrease fitness
All of the above
Answer:
All of the above
Explanation:
Protein is especially important to consume after a workout, as during exercise you are effectively breaking your muscles down. That is why it's common to see people at the gym eating protein bars or drinking whey shakes when they have finished their routine. It helps to increase the impact of their exercise.
Excess protein consumed is usually stored as fat, while the surplus of amino acids is excreted. This can lead to weight gain over time, especially if you consume too many calories while trying to increase your protein intake
Some high-protein diets include foods such as red meat and full-fat dairy products, which may increase your risk of heart disease. A high-protein diet may worsen kidney function in people with kidney disease because your body may have trouble eliminating all the waste products of protein metabolism.
This is the name given to all of the water on Earth.
atmosphere
hydrosphere
biosphere
lithosphere
Answer:
Explanation:
hydrosphere
2
since hydro means water btw
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