Answer:
homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits
Explanation:
How does DNA homology measure genetic relatedness ?
Answer:
by the nitrocellulose membrane filter method. (more info below)
Explanation:
Genetic relationship between mycoplasma as determined by nucleic acid homology. DNA from each of the mycoplasma isolates tested was reacted separately by complementary RNA synthesized with homologous or heterologous DNA as a primer. The amount of DNA-RNA hybrids formed was tested using the method of the nitrocellulose membrane filter.
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How did the Byzantine Empire help to shape the modern world?
Answer: The Byzantine Empire influenced many cultures, primarily due to its role in shaping Christian Orthodoxy.
Explanation:
Answer:
The modern-day Eastern Orthodox Church is the second largest Christian church in the world. In addition, Byzantine art from this period had a strong influence on the later painters of the Italian Renaissance.
Overall, the Byzantine empire has had a wide ranging influence over eastern and even western Mediterranean culture: modern Greece, the Orthodox Church, ancient Greek learning, Muslim and Slavic culture, and more.
How are tumor cells different from normal cells?
A. There are chromosomes in tumor cells.
B. Mitosis is not regulated in tumor tumor cells.
C. Tumor cells use meiosis to replicate.
D. Tumor cells are haploid and other cells are diploid.
Answer:
B
Explanation:
The halogens are the most reactive among all
Answer: among all the elements on periodic table
Explanation:
Bacteria will not be found on fruits or vegetables.
True
False
Answer:
It's false, bacteria will be found
Explanation:
Answer:
i think its false because some of them have pores which allow bacteria to get in
Explanation:
Which of the following would help decrease Global Warming?
A. Drive hybrid/fuel efficient cars
B. Burn fossil fuels
C. Deforestation
D. Use aerosol cans
Answer:
The correct answer would be A.
Explanation:
All of the other things would increase global warming
If you exert 200 N of force to move a box 8 meters across the living room in 2
seconds, what is your power?
A. 80,000 W
OB. 400 W
C. 1600 W
O D. 800 W
SUBMIT
Answer:
800 W
Explanation:
Power is the rate at which work is done. That is, time taken to do a certain amount of work.
Mathematically, power = work done ÷ time taken
But work done = force × distance/displacement
Then work done = 200 N x 8 m = 1600 Nm = 1600 J (since 1 Nm = 1 J)
So power = 1600 J ÷ 2 s = 800 Js^(-1) = 800 W (since 1 Js^(-1) = 1 W).
Ed is analyzing feedback mechanisms that maintain homeostasis in the human body. He follows the procedure that is listed below. (NOTE: Do not conduct this investigation at this time.)
I. Invite a healthy test subject to participate in the investigation.
II. Measure and record the pulse and breathing rate of the subject.
III. Have the test subject exercise vigorously for 1 minute, such as by running in place.
IV. Repeat Step 2.
Why is Step 3 useful for Ed's purpose for the investigation?
a Exercise causes an increase in the pH of blood and other body fluids.
b Exercise increases the body's demand for food and nutrients.
c Exercise has no effect on the body's demand for oxygen, food, and nutrients.
d Exercise increases the body's demand for oxygen.
Answer:
d. Exercise increases the body's demand for oxygen.
Explanation:
More oxygen is needed during exercise by the body as compared to normal condition because our body needs energy which is only generated in the process of cellular respiration. In cellular respiration, glucose molecule is broken down by mitochondria of the cell and energy is generated in the form of adenine tri phosphate (ATP) which is used for performing muscular activity. So that's why oxygen requirement is more during exercise.
A team of marine biologists observe that an inland sea is covered with a green slime. They also observe that besides fishing, the local population
practices large-scale farming in the area. In what possible way can farming be responsible for the state of the lake?
A.
Nutrients from fertilizers on the farm wash off into the lake and cause the green slimy algal bloom
B.
Pesticides from the farm wash off into the lake, causing algae to die and producing a green slime.
C.
D.
E.
Plants growing in the farm increase the chlorophyll levels in the ground, which runs off into the lake, causing the green slime.
The plants in the farm deplete the lake of nutrients and kill off microscopic organisms, causing the green slime.
The green slime in the lake is a toxin produced by pesticides that run off into the lake.
Reset
Next
Answer:
A.
Nutrients from fertilizers on the farm wash off into the lake and cause the green slimy algal bloom
Explanation:
This question describes a team of marine biologists, who observe an inland sea covered up with a green slime. Firstly, this green slime is the the visible form of the proliferated growth of algae, hence, causing what is referred to as ALGAL BLOOM.
Algal bloom is caused by EUTROPHICATION, which is the pollution of water bodies with nutrients from fertilizers e.g phosphate, nitrate etc which causes a rapid algae growth. The excessive nutrients causing this algal bloom appearing like a green slime comes from the fertilizers used by farmers practising large scale farming within that area.
When this fertilizer is applied on plants, it gets washed into the water body and its constituents e.g phosphorus, nitrogen etc. serves as source of nutrient for the growth of marine organisms (algae). Hence, they grow excessively and form a bloom that appears like a green slime on the lake.
Hence, the farming activities is releasing pollutants in form of chemical substances which serve as nutrients for the proliferated growth of algae.
Answer:
B. Pesticides from the farm wash off into the lake, causing algae to die
Explanation:
Green slime algae is a type of algae which is found in the marine ecosystem. This algae is a source of food for aquatic animals. It requires nutrients for producing food in the process of photosynthesis. When the nutrients present in the fertilizers such as nitrates move from the farm into the nearby lakes, its population increases and more food is available for the marine animals and fishing is not possible. But this decrease occurs in population when the pesticides wash off into the lake so farming will be possible for the fisheries.
CARBON IS AN IMPORTANT ELEMENT FOR BIOLOGY BECAUSE
Answer:
D
Explanation:
Carbon is a basis for all life on earth
Question 1 (4 points)
True or False: Solar panels are the only way humans can capture energy from the sun
for use.
True
False
Answer:false
Explanation:because there are a lot of ways that you can get energy.
The cavities in the brain that fill with cerebral-spinal fluid are called _______
A. Ventricals
B. Relay stations
C. Axon stations
A___ is two or more substances that are together in the same place but are not chemically
combined.
Answer:
Chemical Mixtures
A mixture is a material system made up of two or more different substances, which are mixed but not combined chemically. A mixture refers to the physical combination of two or more substances in which the identities of the individual substances are retained.
Explanation:
hope it helps : )
Sebastian wants to make ball-and-stick models of the four macromolecules. He has colored balls for each of the elements in these molecules, including the following.
red: hydrogen
black: carbon
purple: oxygen
green: nitrogen
Which molecule could he make that consists of long chains of red and black colored balls?
Answer:
the answer is B lipids :)
hope it helps
Explanation:
Answer:
b
Explanation:
Maritime polar air masses _____.
A. bring clear, cold, dry air to much of North America
B .are warm, humid air masses that form over oceans
C. bring hot, dry weather to the southern Great Plains
D .are cold, humid air masses that bring fog to the West Coast
Answer:
d.
Explanation:
which chromosomes are the sex chromosomes A. chromosomes 1-22 B. the 3rd pair of chromosomes C. the 22nd pair of chromosomes D. the x and y chromosomes
Answer:
D.
Explanation:
Of the 23 pairs of chromosomes, the X and Y are the pair that determines the sex of the child. X chromosomes stand for female, while Y chromosomes stand for male.
XX means a female
XY means a male
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Where does the energy come from to make NADPH in the light reactions?
A. From the energy released by ATP molecules
B. From the energy stored in light
c. From the energy stored by the Calvin cycle
D. From the potential energy of ADP molecules
SUBMIT
Explanation:
Figure 19.2. The Light Reactions of Photosynthesis. Light is absorbed and the energy is used to drive electrons from water to generate NADPH and to drive protons across a membrane. These protons return through ATP synthase to make ATP.
Answer:
Explanation:
B. From the energy stored in light
How much sperm does a man produce each day
Answer:
about 525 billion sperm cells
Explanation:
In fact, the average male will produce roughly 525 billion sperm cells over a lifetime and shed at least one billion of them per month. A healthy adult male can release between 40 million and 1.2 billion sperm cells in a single ejaculation.
Answer:
1,500
uring spermatogenesis, your testicles make several million sperm per day — about 1,500 per second. By the end of a full sperm production cycle, you can regenerate up to 8 billion sperm. This may seem like overkill, but you release anywhere from 20 to 300 million sperm cells in a single milliliter of semen.
A hormone released by the _____ controls the amount of calcium in the blood. thymus gland thyroid gland adrenal glands parathyroid glands
Why does sexual reproduction result in more genetic variation in a species than asexual reproduction?
A. In sexual reproduction, offspring have more chromosomes than either parent.
B. In sexual reproduction, offspring are haploid organisms.
C. In sexual reproduction, offspring have fewer genes.
D. In sexual reproduction, offsprings are not identical to either parent.
How do the human nervous system and endocrine system interact in
response to a stimulus?
O
A. The endocrine system signals the nervous system to send out
nerve impulses in response to a stimulus.
B. The nervous system signals the endocrine system to release
hormones in response to a stimulus.
C. The nervous system responds to a stimulus, and the endocrine
system returns the body to a relaxed state.
D. The endocrine system responds to a stimulus, and the nervous
system returns the body to a relaxed state.
Answer: option B.
The nervous system signals the endocrine system to release
hormones in response to a stimulus.
Explanation:
The nervous system respond to stimulus through action potentials and neurotransmitters and they signals the endocrine system to secrete hormones.
The endocrine system is responsible for secreting hormones into the blood which is transported to the target cells. These hormones are responsible for metabolism , growth and response to stress. The hormones secreted provide feedback to the brain so as to affect neural processing.
Please answer the following questions about ecology ASAP I always give brainliests and really need help
Answer:
t
Explanation:
The leeward side of a mountain receives far less rainfall than the windward side is what?
Much of airborne moisture falls as rain on the windward side of mountains. This often means that the land on the other side of the mountain (the leeward side) gets far less rain—an effect called a "rain shadow"--which often produces a desert.
What do the variables in the Hardy-Weinberg equation represent?
p
p2
q
q2
2pq
Answer:
p represents the frequency of the dominant allele (in decimal form) of a gene
q represents the frequency of the recessive allele (in decimal form) of a gene
These 2 alleles are different; one is dominant, one is recessive.
p^2 = the frequency of homozygous dominant individuals in the population (decimal form)
2pq = the frequency of heterozygous individuals in the population (decimal form)
q^2 = the frequency of homozygous recessive in the population (decimal form)
Which of the following aquatic ecosystems is likely to have both a littoral and benthic zone?
a Lake
b Open ocean
c Coral reef
d None of the above
Answer:
C. Coral reef
Explanation:
Coral reefs are both found in the littoral zone which is on the shore in a tidepool and in the benthic zone which is the low level of the ocean.
The aquatic ecosystems that is likely to have both a littoral and benthic zone is lake. The correct option is a.
What is littoral and benthic zone?The benthic zone, like the ocean, is the lake floor, made up of accumulated sunken organic matter.
The littoral zone is the area adjacent to the shore where light can easily penetrate and aquatic plants thrive. The pelagic zone encompasses a large body of water.
The Benthic Zone consists of organic sediments and soil at the bottom of a pond or lake. This zone will expand as the body of water ages. It is regarded as the digestive system of a pond or lake.
The littoral zone is a pond or lake's down-sloping shelf. This is the area that extends from the high-water mark to the shore and into the area where sunlight penetrates to the sediments at the bottom of a body of water.
Thus, the correct option is a.
For more details regarding aquatic ecosystems, visit:
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Where is the on and off "switch" located for the neuron?
A. The axon
B. The synaptic gap
C. The dendrites
Answer:
B.
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Which of the following sentences uses spatial organization?
The sentence which uses the spatial organization is option B . Describing the directions and characteristics of the lands nearby is an example of spatial organization.
What is spatial organization ?When elements of an abiotic or biological group are placed in space in a non-random manner, spatial organization can be seen. After thousands of particles interact millions of times, abiotic patterns such as the ripple formations in sand dunes or the oscillating wave patterns are typical illustration for spatial organization.
Disagreement between nations, reading habit, etc. does not describe anything related to space and surroundings.
The description of a landscape and its surroundings are inter-related in many ways and can be taken as a group in that region. Hence, option B is correct. Here, the traveler describes the connection to each regional characteristics.
Find more on spatial organization:
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Hair or fur provide the following- look at picture
Answer:
Hair and fur provides, insulation, protection, and camouflage
Explanation:
Hair and fur can blend in the environment depending what color it is. For example, a tiger blends into the forest with it's black stripes. They provide insulation as they keep in the heat. They also provide protection from the outside world and from predators as their fur/hair hides them.
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what type of adaption would an animal have if they were able to hold there breath for an hour? if u can explain plz
Answer:
They will slow down their heart rate and will change their blood flow to parts like the brain, heart and other important organs and have positively charged oxygen-binding proteins, called myoglobin, in their muscles.
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