As a runner begins to run a race, his or her respiration rate will increase. The runner begins to breathe deeper and at a rapid rate. In addition, the heart beats more quickly. This will result in more oxygen and nutrients delivered to the muscle cells. Which three body systems are working together to help out the muscle cells?
Answer:
respiratory system
circulatory system
digestive system
Why are terrestrial planets closest to the Sun?
Answer:
The Sun sent out energy and particles in a steady stream, called stellar winds. These winds proved so strong that they blew off mostthe gases of the four planets closest to the Sun, leaving them smaller, with only their rocks and metals intact. That's why they are called rocky, or terrestrial, planets.
when a dead animal is burried how long does it take to decompose and form bones? please answer though its awkward me asking this and be sincere ....il give you brainliest no links please
Answer:
It takes millions of years.
Explanation:
As when a dead animal is buried it should reach sedimentary rock
Identify and describe three mechanisms of movement of lymph through the lymphatic vessels.
Answer: Lymph fluid can only flow forward through lymphangions due to the closing of valves after fluid is pushed through by fluid accumulation, smooth muscle contraction, or skeletal muscle contraction if that makes sense. Without valves, the lymphatic system would be unable to function without a central pump.
Explanation:
please help!
Factors that include precipitation, temperature, climate, sunlight are all examples of _______ factors
A) biotic
B)abiotic
C)biological
D)ecological
Answer: the answer is b, abiotic
Explanation: Abiotic factors are the non-living parts of the environment that can often have a major influence on living organisms and Abiotic factors include water, sunlight, oxygen, soil and temperature.
Answer: D
Explanation:
1. How many layers are there in an arthropod's exoskeleton? What is the main function of
each layer?
Explanation:
The exoskeleton and molting
The success of arthropods derives in large part from the evolution of their unique, nonliving, organic, jointed exoskeleton (see figure), which not only functions in support but also provides protection and, with the muscle system, contributes to efficient locomotion. The exoskeleton is composed of a thin, outer protein layer, the epicuticle, and a thick, inner, chitin–protein layer, the procuticle. In most terrestrial arthropods, such as insects and spiders, the epicuticle contains waxes that aid in reducing evaporative water loss. The procuticle consists of an outer exocuticle and an inner endocuticle. In the exocuticle there is cross-bonding of the chitin–protein chains (tanning), which provides additional strength to the skeletal material. The hardness of various parts of the exoskeleton in different arthropods is related to the thickness and degree of tanning of the exocuticle. In crustaceans, additional rigidity is achieved by having the exoskeleton impregnated with varying amounts of calcium carbonate.
arthropod integument
arthropod integument
Diagrammatic section through the arthropod integument.
Encyclopædia Britannica, Inc.
The formation of an exoskeleton required the simultaneous solution of two functional problems in the evolution of arthropods: If the animal is encased in a rigid covering, how can it grow and how can it move? The problem of growth is solved in arthropods by molting, or ecdysis, the periodic shedding of the old exoskeleton. The underlying cells release enzymes that digest the base of the old exoskeleton (much of the endocuticle) and then secrete a new exoskeleton beneath the old one. At the time of actual shedding, the old skeleton splits along specific lines characteristic of the group, and the animal pulls out of the old skeleton as from a suit of clothes. The old skeleton is usually abandoned but in some species is eaten. The new exoskeleton, which is soft and flexible, is then stretched by localized, elevated blood pressure augmented by the intake of water or air. Hardening occurs by stretching and especially by tanning within a number of hours of molting. In crustaceans, calcium carbonate is deposited into the new procuticle. (Soft-shell crabs are simply newly molted crabs.) Additional endocuticle may be added to the exoskeleton for some days or weeks following molting.
molting
molting
Grasshopper shedding its exoskeleton.
© Cathy Keifer/Dreamstime.com
Molting is under hormonal control, and there is a long preparatory phase that precedes the process. The steroid hormone ecdysone, secreted by specific endocrine centres and circulated in the blood, is the direct initiator of molting. The actual timing of a molt, however, is regulated by other hormones and commonly by environmental factors. The interval between molts is called an instar. Because of the frequency of molts, instars are short early in life but grow longer with increasing age. Some arthropods, such as most spiders and insects, stop molting when they reach sexual maturity; others, like lobsters and crabs, molt throughout their lives. Most of the larger spiders of temperate regions, for example, molt about 10 times before reaching sexual maturity. As a result of molting, the length and volume of an arthropod display steplike increases over the life span, but internal tissue growth is continual as in other animals.
Loss of a limb is a common hazard in the life of many arthropods. Indeed, some arthropods, such as crabs, are capable of amputating an appendage if it is seized by a predator. The limb is then regenerated from a small, nipplelike rudiment formed at the site of the lost limb. The new limb develops beneath the old exoskeleton during the premolt period and then appears when the animal molts.
Answer:
Three layers
Explanation:
Outer= Composed of proteins and lipids. Repels water and prevents desiccation in terrestrial places.
Middler=Provides primary protection
Inner=Flexibke at joints, muscles attach here.
Use evidence from the Grants’ research to explain how natural selection leads to evolution. (10 points)
Answer:
The correct answer is - Grant's research on finches on the Galapagos islands.
Explanation:
Grant's research was made on medium-sized finches on the Galapagos islands showed evolutionary processes in real-time. He showed that due to the drought there is a decrease in the number of small and soft seeds that were finches major food source.
It is known that there are different beak sizes in this finch species, the finches with larger beaks could feed on tough and large seeds and survive in such case of the drought-induced decrease in food availability. Due to this natural selection and adaption the number of larger beaks in finches is increased over the real time.
Answer:
Grant's research on finches on the Galapagos islands.
Explanation:
Is it true that a lizard is the venomest creature?
Explanation:
While most snakes and lizards in North America are not poisonous, a few species can seriously injure or kill someone with their venom if the bite isn't treated quickly. They include the rattlesnake, copperhead, cottonmouth, coral snake, Gila monster, and Mexican bearded lizard.
Answer:
Yes and No
Explanation:
There are many lizards that are quite harmless to people ( in fact most of them) but you can still find ones that are unusually furious and deadly , hope this helped :)
What can the reader conclude about ecosystems based on the information in this passage?Ecosystems Ecosystems are are always always distinctly distinctly different different and and unique.unique.Ecosystems Ecosystems are are interrelated interrelated with with other other ecosystems ecosystems surrounding surrounding or or including including them.them.Ecosystems Ecosystems are are slow-slow-developing developing entities entities of of biological biological communitiesmunities.Ecosystems Ecosystems are are clusters clusters of of communal communal habitats habitats in in an an area.area.
um what are the anwsers for the question
Which of the following is true about genes?
A.
In humans, genes are passed to an offspring from two parents.
B.
The genes of a particular organism can never change throughout its lifetime.
C.
Genes are made up of smaller molecules known as chromosomes.
D.
Genes are responsible for all the traits of an organism.
Answer:
i think its A
Explanation:
2. Which object is part of climate
A river
B. bacteria
Coisture
Answer: I think it is B
Explanation:
What are the components of Darwin's theory of evolution?
(9 Points)
The evolution of a population happens slowly
Organisms have common ancestors
Organisms change over time
All of the above
Answer:
B
Explanation:
abcdefghijklmnopqrstuvwxyz
What would happen in an ecosystem without decomposers? (3 points)
Answer:
Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere. And most importantly decomposes make vital nutrients available to an ecosystem primary producers- usually plants and algae.
An easy 10 points
Make up your own scientific theory.
Answer:
Ammmmm theory focused on the structuralist or central-peripheral paradigm, the analysis of internal colonialism and marginality, and studies on dependence are discussed here. Wherever they come, the divergent key positions of the Latin American school are important.
which technique is used for the separation of leaf pigments
Answer:
hope this helps you byee
Circle the letter of each sentence that is true about the cell wall.
a. Cell walls are made of cellulose.
b. Plant cells have cell walls.
c. Animal cells have cell walls.
d. Water and oxygen cannot pass through the cell wall
Answer:
D.Water and oxygen cannot pass through the cell wall
Explanation:
not sure
Land from which water runs off into streams is known as a
Answer:
Run-off
Explanation:
Water from land slides into streams and ponds are called run-off.
Water loss in plants is usually a result of transpiration. Which of the following best describes the path that water will follow from the root system to the shoot system utilizing the vascualr system?
A. to increase tolerance of environmental extremes
B. to accelerate the process of natural selection
C. to maintain homeostasis
D. to adapt to their environment
c to maintain homeostasis
It is c because it wants to regulate the amount of water in it's system
describe properties of minerals.
Why are all X-linked alleles expressed in males, even if they are recessive?
Answer:
It is because Males have just one X chromosome. X-linked recessive alleles are expressed in males because males have only one X-chromosome.
Have a nice day!
and can I maybe have brainliest? Thanks!
A student collected the animal shown below on field trip. The student used a dichotomous key and a microscope to classify the animal.
How should this animal be classified?
A. Arthropoda
B. Annelida
C.Mollusca
D. Platyhelminthes
Answer: The answer is D: Platyhelminthes
Explanation: took the test and it came back
The picture below shows some features of the ocean floor. (1 point)
At which of these locations does the ocean floor spread apart to form new oceanic crusts?
Location A
Location B
Location C
Location D
Answer:
At D
it spreads at the mid ocean ridge ig
Main features of Solar System, Main facts of solar system
Answer:
The main features of the solar system:
The Sun is our nearest star.
The planets orbit the Sun.
The time taken to orbit the Sun increases with distance from the Sun.
Gravity keeps the planets in orbit around the Sun and the moons in orbit around their planets.
From the Sun, the order of the planets is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. You might need to be able to recall this in the exam.
The planets go around the Sun in slightly squashed circular elliptical orbits.
Pluto is classified as a dwarf planet or planetoid. It has a highly elliptical or eccentric orbit.
Main facts
The definition of a planet and a moon is fuzzy. ...
Comets and asteroids are leftovers. ...
The planets are all on the same “plane” and orbit in the same direction. ...
We're nowhere near the center of the galaxy. ...
But the Solar System is bigger than you think. ...
The Sun is hugely massive. ...
Explanation: (:
At what age does a person begin to think about education and career goals over
relationship with friends?
Ten
Fourteen
Eighteen
Late twenties
Answer:
Somewhere in the Fourteen-ish and Eighteen-ish, that's just my opinion of this matter.
Eighteen is the perfect age does a person to begin to think about education and career goals over relationships with friends.
What does adulthood teach us?Being an adult means being responsible for yourself. So instead of doing everything you want to do, you start to compromise. You learned that you need to take care of your problems instead of running away from them. Instead of pulling out an all-nighter, you learn to manage your time better.
After the eighteenth of a person, a person should be considered an adult. Adulthood is a stage where a person considers themselves more responsible for their lives and carrier goals.
Learn more:
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The notochord is an embryonic structure in humans that develops into
the spinal cord in the adult. What does the notochord suggest about
humans' relatedness to other species?
M
Answer:
In anatomy, the notochord is a flexible rod formed of a material similar to cartilage. If a species has a notochord at any stage of its life cycle, it is, by definition, a chordate. The notochord lies along the anteroposterior ("front to back") axis, is usually closer to the dorsal than the ventral surface of the animal, and is composed of cells derived from the mesoderm.
El numero de doploide de cromosomas de la especie humana que se restablece durante la
Answer:
El numero diploide de la especie humana se restablece durante la fecundación del ovulo por parte del espermatozoide, en donde estas dos células haploides (23 cromosomas) se unen formando un cigoto y próximamente un feto que poseerá los 46 cromosomas necesarios para la formación de un ser humano
Explanation:
HELP!!! PLZ 10 minutes!!
In aerobic cell respiration, glucose is converted to:
a) H20
b) O2
c) Electrons
d) CO2
Human body systems are made up of organs that work together to perform specie
functions. The circulatory system and the respiratory system have one organ in
common. Which organ is common to both systems?
(A)arteries (B)large intestines (C)stomach (D)heart
which option shows the correct spelling of the word?
a. exhibit
b.exhibet
c.xibit
d.exibit
Answer:
A. exhibit
Explanation:
The only logical response!
Answer:
A
Explanation:
exhibit
The molecule that carries a great deal of chemical energy in its chemical bonds and is made in both photosynthesis and cellular respiration is
DNA
RNA
NADPH
ATP
Glucose