Answer:
The nucleoid is an irregularly shaped region within the prokaryotic cell that contains all or most of the genetic material.
The time for one rotation of the Moon is 27.3 days. What is the time revolution for the Moon?
365 days
24 days
24 hours
27.3 days
Answer:
i believe it is 27.3
Arrange these components of the mammalian immune system as it first responds to a pathogen in the correct sequence. I. Pathogen is destroyed and digested and parts are presented. II. Lymphocytes secrete antibodies. III. Antigens from pathogens bind to matching receptors on lymphocytes. IV. Lymphocytes specific to a pathogen's antigens become numerous. V. Only memory cells remain.
Answer:
The correct sequence is:III) Antigenic determinants from pathogen bind to antigen receptors on lymphocytes.
IV) Lymphocytes specific to antigenic determinants from pathogen become numerous.
II) Lymphocytes secrete antibodies.
I) Pathogen is destroyed.
V) Only memory cells remain.
Explanation:
Effective resistance against infection is essential for the development and functioning of the mammalian organism, and for it to be effective, multiple defense systems must be available. In order to meet these objectives, the body has developed a complex system of overlapping and interrelated defense mechanisms, which together can destroy or control almost all invaders.III) Antigenic determinants from pathogen bind to antigen receptors on lymphocytes. It consists of the binding of the foreign antigen to the specific receptors existing on the membrane of mature lymphocytes. The B lymphocytes that mediate humoral immunity express antibody molecules on their surface, which bind to foreign proteins, polysaccharides or lipids in their soluble form; T lymphocytes, responsible for cellular immunity, express so-called T cell receptors (TCR), which recognize small sequences of antigenic peptides.
IV) Lymphocytes specific to antigenic determinants from pathogen become numerous.II) Lymphocytes secrete antibodies.
Activation phase: sequence of events that occur in lymphocytes as a result of specific antigen recognition. All lymphocytes undergo two fundamental changes: a) proliferation: expansion of antigen-specific clones and amplification of the protective response, in which the CD4 T lymphocyte, capable of activating CD8 B and T lymphocytes, assumes a preponderant role; b) differentiation: stage in which effector cells and memory cells are formed. The first produce various substances that can interact with the antigen, such as antibodies and lymphokines; the second are partially differentiated lymphocytes, that is, they do not become effector cells.
I) Pathogen is destroyed.
In this phase, the T lymphocytes differentiated into effector cells migrate to the sites of attack, where they carry out their functions of eliminating pathogens, while the B lymphocytes perform them in the peripheral organs themselves.
V) Only memory cells remain.
One of the most important consequences of the adaptive immune response is the establishment of the state of immunological memory, which lies in the ability of the immune system to respond more quickly and efficiently to microorganisms that have previously infected the host and it reflects the preexistence of a clonally expanded population of antigen-specific lymphocytes. We call, therefore, the immune response that the organism gives when it comes into contact for the first time with a foreign agent and from which a series of events derives that include nonspecific innate defense mechanisms and adaptive response mechanisms, if the pathogen manages to survive the first ones.
Select the elements that have 4 valence electrons.
hydrogen (H)
krypton (Kr)
strontium (Sr)
carbon (C)
oxygen (O)
tin (Sn)
What´s the final answer
Answer:
secondary succession
Explanation:
Please help will give brainliest
Answer:
i think it is c
Explanation:
if an animal is born with black fur but never had a black phenotype, would it be a mutation??
Water power is a clean and renewable source of energy, but has many drawbacks. Which of the statement describes how hydropower does not impact the environment?
A)
Large dams and reservoirs flood land habitats and change them to water habitats, forever changing the landscape and environment.
B)
Dams block the migration of fish.
C)
Dams trap moving sediment causing sand depletion and reservoir damage.
D)
Large dams create earthquakes, which increases the probability of dam failure and flooding.
E)
All of the above
Answer: E all of the above
Explanation:
Which is a requirement for diffusion to take place?
Answer:
Explanation: Diffusion is a process that allows particles to move from areas of high concentration to areas of lower concentration. The process requires that particles are moving. As long as particles are not at a temperature of 0K (absolute zero) they have kinetic energy (energy of movement)
so um im taking a biology test rn, and i need help on it. i was wondering if someone could help me?
Answer: yes
Explanation:
HOW DO I FIND THE PERCeNT
N:no ears
n:has ears
-what percent of the offspring will have ears????
Answer:
50% will have ears
Explanation:
To have ears you must have the trait nn since the ears trait is recessive, 2 of the four possible offspring are like this, so 50%
Why might parasitic roots have developed in plants like the mistletoe?
Answer:
Mistletoe is a parasite – it steals water and nutrients from trees. Technically, it is a “hemiparasite”, which means that it can generate some of its own resources through photosynthesis – it just needs that energetic kick from the sun to fuel the biological siege and subsequent invasion of the tree
Explanation:
How are ecosystems affected by landslides?
Answer: Landslides can overwhelm, and even pollute streams and waterbodies with excess sediment. In extreme cases they can dam streams and rivers, impacting both water quality and fish habitat. Landslides can wipe out large tracts of forest, destroy wildlife habitat, and remove productive soils from slopes.
when does a star start to die
Answer:
Several billion years after its life starts, a star will die. How the star dies, however, depends on what type of star it is. Stars Like the Sun. When the core runs out of hydrogen fuel, it will contract under the weight of gravity. However, some hydrogen fusion will occur in the upper layers. As the core contracts, it heats up.
Memory effector cells are also produced in the case that the same pathogen enters the organism again.
true or false
Answer:
True
Explanation:
The first contact that an organism has with a particular antigen will result in the production of effector T and B cells which are activated cells that defend against the pathogen. ... Memory T and memory B cells are also produced in the case that the same pathogen enters the organism again.
How are fossil fuels related to climate change?
A. Fossil fuels absorb carbon dioxide, a greenhouse gas, as they
burn.
B. Fossil fuels release carbon dioxide, a greenhouse gas, as they
burn
C. Fossil fuels release a great deal of heat as they burn.
D. Fossil fuels are greenhouse gases.
Answer:
B. Fossil fuels release carbon dioxide, a greenhouse gas, as they
burn
On Earth, human activities are changing the natural greenhouse. Over the last century the burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2.
B. Fossil fuels release carbon dioxide, a greenhouse gas, as they burn.
What are fossil fuels?Fossil fuels are non-renewable resources that are formed over millions of years from the remains of dead plants and animals. They include coal, oil, and natural gas, which are used to generate energy and power many modern-day technologies.
Fossil fuels are found in deposits beneath the Earth's surface, and they are extracted through mining or drilling. They are burned to release energy in the form of heat or electricity, making them a primary source of energy for transportation, electricity generation, heating, and cooling. However, the burning of fossil fuels also releases greenhouse gases, which contribute to climate change and other environmental problems.
When fossil fuels such as coal, oil, and natural gas are burned, they release carbon dioxide (CO2) and other greenhouse gases into the atmosphere.
These greenhouse gases trap heat from the sun, causing a warming effect on the Earth's surface. This phenomenon is known as the greenhouse effect, and it is a significant contributor to climate change.
As the concentration of greenhouse gases in the atmosphere continues to increase, the Earth's temperature rises, leading to changes in climate patterns, rising sea levels, and more frequent extreme weather events.
Learn more about fossil fuels at:
https://brainly.com/question/3371055
#SPJ7
what system carries auxin to move to the darker side?
Vascular system.
Phototropisms are caused by an unequal distribution of auxin. This makes the plant grow either towards or away from the light, depending on which part of the plant receives the light.
In a stem, the cells on the shaded side contain more auxin and grow longer than the cells on the light side. This causes the stem to grow towards the light. It is vital to note that the plant does NOT bend towards the light.
Phototropisms are a result of an unequal distribution of auxin. This makes the plant develop both in the direction of or far from the mild, relying on which part of the plant gets the mild.
In a stem, the cells at the shaded aspect comprise greater auxin and develop longer than the cells at the mild aspect. This reasons the stem to develop in the direction of the mild. It is crucial to be aware that the plant does NOT bend in the direction of the mild.
What are auxins?Auxins are a category of plant hormones (or plant-boom regulators) with a few morphogen-like characteristics. Auxins play a cardinal position in the coordination of many boom and behavioral procedures in plants cycles and are important for plant frame development.
Thus it is clear that the system that carries auxin to move to the darker side is the vascular system.
To learn, more about the vascular system refer to the link
:https://brainly.com/question/22682947
Will give brainliest
Answer:
d i think
Explanation:
what system carries auxin to move to the darker side?
a) dermal
b) immune
c) reproductive
d) vascular
In which grade does a child learn to read aloud with fluency
The answer is 4-8.
yea that it
Solid waste includes all of the following except
A. agricultural waste
B. methane
C. plastics
D. food waste
Answer:
B. methane
Explaination: ...............................
Exit Ticke
Answer the following question by filling in the blank from the word bank:
A scientist was observing a unicellular organism over a period of time. He noticed
that vacuoles kept moving to the same place in the plasma (cell) membrane to
empty their contents outside the cell.
The organism that was being observed was a
a) Euglena
c) Volvox
d) Paramecium
b) Amoeba
add sneaker notes
Answer:
D) Paramecium
Explanation:
Sorry if my answer is wrong
You are a mad scientist. You have figured out a way to replace one part of the respiratory and circulatory systems. You believe by doing this one thing you can create an army of physically unbeatable warriors and conquer the world. (Remember you are MAD!) a - What part would you replace to accomplish this? b - What would you replace it with? c - Explain your thinking on how doing this would help create these powerful warriors.
Answer:
I'd proceed to order pipes from ebay as to replace said parts.
During the process I'd question why is there an army of beef-cake Mega-Men in my basement.
Since I'm a mad scientist I'd make some type of body armor that enhances durability, Thus allowing my warriors to remain standing tall while taking a few rounds of a some good ol' bullet lead.
I would also use BIO-Tech enhancing their skin durability to take the deepest of cuts. Muscle definition and power so my men could slap an Elephant to next week.
(Or atleast until the government find out about the absolute units in my basement and arrest me)
which best describes a difference between transcription and DNA replication?
a.transcription does not require dna
b.only transcription happens in the nucleus
c.dna replication takes place in the ribosome
d. dna replication uses thymine
Answer:
D: DNA replication uses thymine
Explanation:
Make sure to look up your question before you ask it, as there was already an answer to this exact question: https://brainly.com/question/18486826
Which series is arranged in order from largest to smallest in size?
What are the characteristics of calcium in the human body ?
Answer:
look below
Explanation:
Calcium is very essential in muscle contraction, oocyte activation, building strong bones and teeth, blood clotting, nerve impulse, transmission, regulating heartbeat and fluid balance within cells. Brainliest please.
Which of the following is not true about groundwater
A)
Its a long-term reservoir
B)
Significant during drought
C)
It is the only source of freshwater
D)
It is replenished by surface water
the correct statement is
D. It is replenished by surface water
Answer:
C - it is the only source of freshwater
Explanation:
Surface water is another source of freshwater, rendering this statement not true
Community one contains 100 individuals distributed among four species (A, B, C, and D). Community two contains 100 individuals distributed among three species (A, B, and C). Which community is more diverse?
Community one: 10A, 5B, 75C, 10D
Community two: 30A, 40B, 30C, 0D
Community one: 24A, 26B, 26C, 24D
Community two: 5A, 50B, 40C, 5D
Explain briefly about how
implantation of embryo take
place
in the uterus.
Answer:
Implantation is the mechanism by which a blastocyst, which is passing through the uterus as a developing embryo, makes contact with the uterine wall and remains bound to it before birth. The uterine lining (endometrium) undergoes several internal modifications in order to allow for the emerging blastocyst to bind to it.
Explanation:
- Eijiro <3
Fossils can be body parts of ancient organisms, or they can be traces. Give five examples of trace fossils
Answer:
Trackways/footprints, mold and cast fossils, feeding marks, coprolites, and burrows. Trace fossils show the activity of ancient organisms rather than the body fossil itself. However, it is rather difficult to identify an organism by use of mere trace fossil, and therefore, it is less accurate.
what system protects outer cover if that body
Answer:
This would be the The integumentary system
Explanation:
I will write it in comments