Which structure of the lymphatic system functions as the site of development of T lymphocytes during childhood and the preteen years, but is replaced by fat as an individual grows older?
thymus
bone marrow
spleen
adenoids
Answer: thymus
Explanation: T cells adapt in the immune system just like the thymus
Answer:
Thymus
Explanation:
I don't actually know so I'm sorry if it is wrong
Have a great day!!!!!
Which human activity negatively affects the stability of the environment?
Answer:
Some human activities that cause damage (either directly or indirectly) to the environment on a global scale include population growth, overconsumption, overexploitation, pollution, and deforestation, to name but a few.
Explanation:
Brainliest?
Of all of the energy given off by the Sun directed towards Earth, approximately only 50 percent of the energy penetrates directly to
the surface of Earth. What is the best explanation for what happens to the rest of the energy?
A) Energy is lost during while traveling through space.
B) Energy is reflected or absorbed by Earth's atmosphere.
C) Some of the energy is reflected back into space by the Moon.
D) Energy is lost through the process of overcoming the Sun's large gravitational force.
Can someone please help ASAP
Answer:
I would say 2/4 or 3/4 sorry if its wrong
Which of the following are sources of extra nutrients that can cause algae to overgrow in water due to HUMAN activity? CAREFULLY select all options that apply
dissolved oxygen in water
treated waste water
viruses
combined sewage overflow (CSO)
fertilizers
cleaning products
dog poop on the streets of NYC
water running over rocks
(This is 7th grade sciencve).
Answer:
Too much nitrogen and phosphorus in the water causes algae to grow faster than ecosystems can handle. Significant increases in algae harm water quality, food resources and habitats, and decrease the oxygen that fish and other aquatic life need to survive.
hopes this helpssssssssssssssssssssssssssssssssssss
What is the difference between a molecule and a diagram of a molecule ?
Answer: The molecule itself is the actual thing present.
while the diagram explains what makes up a molecule or what it looks like structurally
Explanation:
QUESTION: Which one of the following is likely to be most effective in reducing dental decay?
(a) Eating fibrous food, e.g. apples, after meals.
(b) Cutting down on sweets, biscuits etc. between meals.
(c) Cleaning the teeth after meals and at night.
(d) Using an antiseptic mouthwash.
help me plz
Answer:
It is between B and C I am 99.999% Sure its C but you might wanna check :))))
Explanation:
Atmospheric nitrogen, in its gaseous form, is useful to plants. *
True
False
Answer:
true
Explanation:
Answer:
False.
Explanation:
Atmospheric Nitrogen, in its gaseous form, is harmful to Plants and Animals.
Have a great day! (:
Why would some fish prefer colder/clearer waters and some warmer/turbid waters?
Answer:
Cold water has the ability to hold more oxygen than warm water. Hot summer temperatures can heat water so it won't hold enough oxygen to maintain fish life.
Explanation:
What kind of bacteria are able to change pure nitrogen into ammonia compounds?
Group of answer choices
nitrifying
decomposing
nitrogen-fixing
denitrifying
Answer:
the anwer is nitrifying fixing as given in your text .
Explanation:
Decomposers also produce ammonia by converting animal waste and dead plants and animals into organic and inorganic materials, including ammonia.
Which component of a galaxy consists of tiny particles that look smoky or cloudy and can be found in the space between stars? A) Gas B) Stars C) Dust D)Sun
Answer: Gas
Explanation:
Look through the lesson lol i know your school
Nebulae are different luminous regions of the interstellar medium that can be made up of cosmic dust as well as ionized, neutral, or molecular hydrogen, hence option C is correct.
What is dust?All the stuff between stars is referred to as interstellar matter by astronomers, and the complete collection of interstellar matter is referred to as the interstellar medium (ISM). Some interstellar material is gathered into massive clouds that are each referred to as a nebula.
Tiny pieces of solid matter drifting about in the region between stars make up cosmic dust. It's not like the dust you find in your home; instead, it has tiny particles that range in size from collections of just a few molecules to grains that are 0.1 mm in size.
Therefore, an interstellar medium can be made up of cosmic dust as well as ionized, neutral, or molecular hydrogen, hence option C is correct.
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Which of the following is a synthetic material?
a. wood
b. plastic
c. wool
d. coal
Answer:
Your answer is B) Plastic.
Explanation:
"Synthetic" just means "human-made" or "artificial".
A), C), and D) can all be found in nature, and aren't made by humans.
At which type of technonic plate boundary is a volcano least likely to occur
Answer: A
coz its just sliding one another
Hope it is correct
^_^
Give three differences between parenchyma and selerenchyma?
Answer:
Parenchyma cells have thin primary walls and usually remain alive after they become mature while Sclerenchyma cells have thick lignified secondary walls and often die when mature.
Parenchyma forms the "filler" tissue in the soft parts of plants while Sclerenchyma provides the main structural support to a plant.
Parenchyma cells are usually loosely packed with large intercellular space while Sclerenchyma cells has no intercellular spaces between the cells.
Will lactase, the enzyme that digested the ice cream's lactose, also work on the lactose found in cheese?
Answer:
Yes
Explanation:
This is because lactose found in any dairy product will always have the same molecular structure. The lactase enzyme breaks down lactose because of how it is structured, so it does not matter where the lactose comes from.
Will give the brainiest! Please answer it correctly and thoughtfully. Please answer the first question with AT LEAST 2-3 sentences, while the last one can just be examples
1. Meiosis is two divisions of a reproductive cell’s nucleus. It occurs in a continuous series of steps. Compare AND contrast the steps of meiosis I to meiosis II.
2. Describe mutation. Give EXAMPLES where mutations could be harmful, beneficial, or neutral.
Answer:
1. Both Meiosis I and II have the same number and arrangement of phases: prophase, metaphase, anaphase, and telophase. In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.
2. Answer! A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. The majority of mutations are neutral in their effects on the organisms in which they occur. Beneficial mutations may become more common through natural selection. Harmful mutations may cause genetic disorders or cancer. I hope it helps! :)
All planets in the solar system have surfaces that are made up of either one of two materials. What are the two materials?
Answer:
are made of rock, containing common minerals like feldspars and metals like magnesium and aluminum.
Explanation:
In C3 cycle one carbon compound is accepted by?
Answer:
The correct answer is - RuBP.
Explanation:
In calvin cycle or C3 cycle there is only one carbon compound present or enter in the cycle is carbon dioxide which is enters through stomata and move into stoma of chloroplast. It is the site of of the C3 cycle.
In calvin cycle energy used to reduce 3-phosphoglyceric acid to produce glyceraldehyde-3 phosphate which result in generation of the RuBP that accepts the CO2 from the air to attached with RuBISCO.
4. Transcribe and Translate a Gene. How is mRNA different from DNA? (Hint read the side-bar on this page for help) What is the correct starting position for translation? Write the amino acids used to assemble your protein in the order below. Where does translation take place?
Identify a control group for the analysis shown in Figure 3. Justify analyzing SIRT3 protein level in four different cancer cell lines, as shown in Figure 1. Based on Figures 1 and 3, describe the relationship between SIRT3 expression and cytoplasmic ATP levels. Calculate the percent change in cytoplasmic ATP levels by SC+RNA cells compared with SC+plasmid cells.
Answer:
the control group is NS (normal stomach cells). the different cells can react different ways based on the specific cell because each cell in different people codes for different traits in each person therefore they are likely to react differently. the higher the SIRT3 expression the higher the cytoplasmic ATP levels. the difference is about 1 difference.
Explanation:
Can you tell me which go where?
Answer:
heredity goes to the first one
phenotype at the second one
Explanation:
Which Punnett square represents a cross between two parents that are heterozygous for purple flowers?
F
f
FF
Ff
f
F
ff
f
f
Submit
Nit
Answer:
Ff
Explanation:
heterozygous form for purple is Ff
The Punnett square that represents a cross between two parents that are heterozygous for purple flowers are Ff × Ff.
WHAT IS A PUNNET SQUARE?A punnet square is a square diagram that is used to predict the genotypes of a particular cross between two parents using their gametes.
According to this question, a cross involves two parents that are heterozygous for purple flowers. The genotypes of these parent are Ff × Ff.
Therefore, the Punnett square that represents a cross between two parents that are heterozygous for purple flowers are Ff × Ff.
Learn more about punnet square at: https://brainly.com/question/11660215
True or False.
The lymphatic and immune systems contain the lymphatic vessels and ducts, lymph nodes, bone marrow, and spleen.
Answer:
True
Explanation:
I also like your profile picture
The lymphatic system consists of lymphatic vessels and ducts, lymph nodes, and spleen. The immune systems consist of bone marrow. Hence, statement true.
What is immune system?The system that helps to fight infections and diseases with the help complex system of tissues, cells, organs is called as immune system.
In humans, immunity is of 3 types including:
adaptive immunity- natural immunityinnate immunity- develops throughout lifepassive immunity- borrowed from any source that doesn't last long.Bone marrow and the thymus are primary parts of the immune system. Bone marrow play significant role in production of blood cells including B and T lymphocytes. In also includes organs of lymph system such as lymph node, thymus, spleen, tonsils, lymph node, and lymph vessels.
Therefore, The statement above is true.
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QUICK PLS
Body cells have
____ the number of chromosomes as sex cells.
a: 4times
b: one half
c: one fourth
d: twice
Answer:
Body cells have twice the number
What is the function of mitochondria in prokaryotes?
Answer:
Prokaryotes lack mitochondria.
which of the following correctly identifies the inheritance patterns arnoldo is observing?
the yellow allele is incompletely dominant...
Explanation:
The yellow allele is incompletely dominant.
What is Inheritance pattern?Genetic variation distribution in families is characterized by inheritance patterns. Predicting disease risk in a patient's family requires an understanding of these patterns.
Conditions brought on by pathogenic variations in a single gene are referred to as monogenic or Mendelian conditions.
Depending on the pattern of inheritance, a gene may be influenced by either one or both alleles.
Therefore, The yellow allele is incompletely dominant.
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How can the health of a forest play a role in maintaining human health?
A. Forest can be a source of mining.
B. Forest provide pulp to make paper.
C. Medicines are made from forest species.
D. Forest provide numerous wildlife habitats.
Answer:
C. medicine can be made from different sources in the forest
4. If we had a waxing crescent moon on December 3, what phase will be seeing on December
13 (10 days later)?
Answer:
Waxing gibbous
Explanation:
Which is the most efficient way to avoid DNA mutations from UV radiation?
Avoid getting X-rays at the doctor’s office.
Avoid protective shields during X-rays.
Avoid UV radiation by wearing sunscreen.
Avoid UV radiation by using a tanning bed.
Answer:
Sunscreen is the best, and most efficient way to avoid DNA mutations. UV radiation causes thymine dimers in the DNA complex, so limiting UV radiation is key to avoiding DNA mutations.
Explanation:
The most efficient way to avoid DNA mutations from UV radiation is to avoid UV radiation by wearing sunscreen. Thus, the correct option is C.
What is DNA mutation?DNA mutation may be defined as the process that induces sudden, stable, and inheritable changes in the genetic material of organisms through various factors.
The UV radiations are the most potent physical agent that induces DNA mutation. But in order to avoid such kinds of DNA mutations from UV radiation one must be required to be protected from such kinds of harmful radiation with the help of sunscreen.
The UV radiation induces DNA mutations by causing the dimerization of the thymine base, which significantly alters the whole sequence of genetic material.
Therefore, the most efficient way to avoid DNA mutations from UV radiation is to avoid UV radiation by wearing sunscreen. Thus, the correct option is C.
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Overgrazing reduces grass cover and negatively impacts the soil health by reducing it's ability to hold water . How can Overgrazing be prevented and support a more sustainable use of grasslands ?
A. Allow developers to buy rachlands for housing .
B. practice moving confined cattle every few days
C. Allow unlimited animals to graze in a given area to reach carrying capacity.
D. practice grazing an area of land at the same stage of plant growth each year .
Answer: C. Allow unlimited animals to graze in a given area to reach carrying capacity.
Explanation: I choose this as the answer because the animals grazing in the wrong parts be part of the reason the soil can't hold the water it needs, so allowing animals in a particular area that's less of a problem with Overgrazing would be helpful