I need help please!!!

Answer:

tundra

Explanation:

Answer:

water enteringthrough the lungs

Explanation:

hope it's correct

Answer:

water entering through the lungs

Explanation:

Answer:

protists

Explanation:

Answer:

Protists are organisms that are part of the biological kingdom called the protista. These organisms are not plants, animals, bacteria, or fungi. Protists are a very diverse group of organisms. They are basically all the organisms that don't fit into the other groups.

Explanation:

Answer:

La actividad humana produce mucho ruido, y los altos decibelios en un determinó do lugar por encima de sus niveles naturales marcan la contaminación.

Explanation:

Creo que es la respuesta

Answer: Option D.

An entrepreneur enjoys all the profits and absorbs the losses

Explanation:

An entrepreneur is someone who set up a business and also enjoy all the profits and bear its lose. An entrepreneur is an initiator of new things and procedures. He creates a new business using his on creative ideas, innovations and the proceedings to the involved. He is the sole contributor of ideas and capital involved.

Answer:

Cytotoxic T cell - kills infected human cells after recognizing antigens displayed on MHC class 1 B.

Helper T cell - does not directly kill microbes; after recognition of a specific antigen displayed on MHC Class 2, it secretes molecules that help other cells to do so.

B cell - phagocytoses microbes after recognizing specific antigens; secretes antibodies

Natural Killer Cell - kills virus-infected human cells by releasing perforin and granzymes.

Macrophage - Phagocytoses microbes after recognizing PAMPs; acts as an Antigen Presenting Cell to activate another type of immune cell

Mast Cell - Does not directly kill microbes; secretes histamine to initiate an inflammatory response.

Explanation:

T cell are immune-response cells that originate in the bone marrow but migrate and develop in the thymus gland. They are of two classes; Cytotoxic T cells and Helper T cells.

Cytotoxic T cell - kills infected human cells after recognizing antigens displayed on MHC (Major histocompatibility complex) class 1 B.

Helper T cell - does not directly kill microbes; after recognition of a specific antigen displayed on MHC Class 2, it secretes molecules that help other cells to do so.

B cells are formed and develop in the bone marrow. They make antibodies against antigens, and phagocytoses microbes after recognizing specific antigen.

Natural Killer Cells are cytotoxic lymphocytes of the innate immune system. They kill virus-infected human cells by releasing perforin and granzymes.

Macrophages are a type of white blood cells that detects and phagocytoses microbes after recognizing PAMPs (Pathogen-associated molecular pattern) They also act as Antigen Presenting Cell (APCs) to activate another type of immune cell

Mast Cells are cells found in the connctive and they function as part of the immune system of the body. They do not directly kill microbes. They secrete histamine to initiate an inflammatory response.

Answer: For my knowledge of most plants, I'm pretty sure it's C., embryo.

Explanation: . . .

Answer:

0.153

Explanation:

We know the up-thrust on the fish, U = weight of water displaced = weight of fish + weight of air in air sacs.

So ρVg = ρ'V'g + ρ'V"g where ρ = density of water = 1 g/cm³, V = volume of water displaced, g = acceleration due to gravity, ρ'= density of fish = 1.18 g/cm³, V' = initial volume of fish, ρ"= density of air = 0.0012 g/cm³ and V" = volume of expanded air sac.

ρVg = ρ'V'g + ρ"V"g

ρV = ρ'V'g + ρ"V"

Its new body volume = volume of water displaced, V = V' + V"

ρ(V' + V") = ρ'V' + ρ"V"

ρV' + ρV" = ρ'V' + ρ"V"

ρV' - ρ"V'  = ρ'V" - ρV"

(ρ - ρ")V'  = (ρ' - ρ)V"

V'/V" = (ρ - ρ")/(ρ' - ρ)

= (1 g/cm³ - 0.0012 g/cm³)/(1.18 g/cm³ - 1 g/cm³)

= (0.9988 g/cm³ ÷ 0.18 g/cm³)

V'/V" = 5.55

Since V = V' + V"

V' = V - V"

(V - V")/V" = 5.55

V/V" - V"/V" = 5.55

V/V" - 1 = 5.55

V/V" = 5.55 + 1

V/V" = 6.55

V"/V = 1/6.55

V"/V = 0.153

So, the fish must inflate its air sacs to 0.153 of its expanded body volume

Answer:

The answer is D. To influence political decisions

Explanation:

Answer:

long-day plants

gibberellins

stimulus

cytokinins

day-neutral plants

photoperiodism

short-day plants

abscisic acid

tropism auxin

photosynthesis

respiration

Answer:

- Fungi are an important source of food.

- Yeast, a unicellular fungus,is important in bakeries as it is used in the making of bread.

- Yeast also produces vitamin B.

- Fungi, like bacteria,are also good decomposers.

- Penicillin an important antibiotic is obtained from a fungus called Pencillium notatum.

- fungi are responsible for breaking down organic matter and releasing carbon, oxygen, nitrogen, and phosphorus into the soil and the atmosphere.

- Fungi are essential to many household and industrial processes, notably the making of bread, wine, beer, and certain cheeses.

Explanation:

hope this helps ^_^

Answer: HALF

Explanation:

CONTEXT CLUES AND I TOOK IT BEFORE

Answer:

D: Refraction

Explanation:

A: Reflection is not when light goes through water. C: Bending is not the correct term used.

Answer:

C

Explanation:

elements in the same column have different number of protons and different number of neutrons.

Elements in the same column of the periodic table of elements all share the same atomic structure. Thus, the correct option for this question is B.

Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements.

The number of protons governs the atomic number of an element. So, elements never have the same number of protons. The number of neutrons along with protons governs the atomic mass of an element which also never remains the same.

The physical characteristics of any element depend on the majority of the attributes. So, it may also vary from element to element.

Therefore, elements in the same column of the periodic table of elements all share the same atomic structure. Thus, the correct option for this question is B.

To learn more about the periodic table, refer to the link:

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Answer:

The answer is D.

Explanation:

D- A mountain range in Europe

Alpine tundra is found on high-latitude landmasses, above the Arctic Circle like Russia, Greenland, Iceland, and Scandinavia. Thus option A is correct

Alpine tundra is a type of ecosystem that occurs at high elevations characterized by colder temperatures, long winters, and growing seasons are shorter with no trees.

The Russian north woods have Treeless tundra and distinctive vegetation known as Beringian woodland, high mountain range, and long winter. so option A is correct.

Learn more about the tundra, here:

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Answer:

the answer is 6 secs rounded to nearest ten is 10

Explanation:

hope it helps

Answer: increased burning of fuels

Explanation:

could i perhaps get brainliest

Answer:A

Explanation:

Answer: Succession is a series of  changes in the composition of an ecological community over time.

Explanation:

i hoped this helped

Answer:

B: magma squeezes through crcks in the crust

Explanation:

Lava (magma that has erupted onto the Earth's surface) is visually mesmerizing – as the molten rock flows downhill, lava exposed to the air cools to a deep black color, while the molten rock beneath glows bright orange.

im not sure ha but ok nadin yan

to give birth to youg one

Answer:

false

Explanation:

Answer:

rna

Explanation:

it turns in rna and I do t wanna type more

Answer:

b

Explanation:

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.

Answer:

01. the continued existence of organisms that are best adapted to their environment, with the extinction of others, as a concept in the Darwinian theory of evolution.

02. It shrinks as species begin fighting for resources.

03. The animal will experience a lack of growth.

04. Level 1: Plants and algae make their own food and are called producers. Level 2: Herbivores eat plants and are called primary consumers. Level 3: Carnivores that eat herbivores are called secondary consumers. Level 4: Carnivores that eat other carnivores are called tertiary consumers.

Explanation:

Answer:

generating tetanus-specific memory B cells

Explanation:

Memory B cells are cells of the immune system that produce antibodies against specific antigens present in pathogenic organisms. The B lymphocyte cells produce clonal memory B cells after the first exposure to the antigen, a process known as clonal selection. Subsequently, memory B cells that circulate in the bloodstream trigger a rapid secondary immune response (after a second exposure to the antigen) by producing antibodies against specific antigens that activated their parent B cell. Moreover, the DPT vaccine includes purified tetanus toxins (i.e., target antigens) that induce clonal expansion in specific B cells, thereby generating a population of memory B cells that produce specific antibodies rapidly in secondary immune responses.

Answer:

true

Explanation:

Option B- Two Oppositely-Charged Ions

Answer:

Protozoa formed cysts and bacteria produces endospores.

Explanation:

Protozoa can survive in dry and unfavourable environments, by producing resting cysts that enable them to remain dormant until conditions are favourable while on the other hand, bacteria produce special dehydrated cells called Endospore which helps the bacteria to survive unfavourable environmental conditions. These endospores help bacteria to resist high temperature, radiation, drying, and other environmental extremes.