How many parents does a spore have?
A. one
B. two

Answer:

for respiration lungs,nose

for nutrition mouth and stomach

for reproduction various reproduction organs like penis and vagina

growth -

excretory - skin(sweat) ueltra blader kidney liver

Explanation:

Answer:

y = 3x + 8 because the y-intercept is always adding if it's positive and and the slope always has the x in the back.

Natural gas is a non-renewable hydrocarbon used as a source of energy for heating, cooking, and electricity generation. It is also used as a fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals.

hope this help! ^^

Answer:

b

Explanation:

bcuz whatever subject this is

Answer:

A protein

Explanation:

Answer: Global Warming

Explanation: Global warming is the unusually rapid increase in Earth's average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels. ... Temperatures are certain to go up further. Despite ups and downs from year to year, global average surface temperature is rising.

Answer:

C. area of maturation

Explanation:

Plz give me brainiest

Answer: B

Explanation:

Grace is the term Christians use to describe God's unconditional love for everyone, whether or not they have behaved as he wants them to. Because God's love is thought to bring redemption , some Christians believe that salvation does not need to be earned through good works.

Answer:

c

Explanation:

Answer:

c

Explanation:

Answer:

Higher latitudes receive less sunlight producing cold biomes.

Explanation:

Regions with similar climates and plant types are called biomes.

Terrestrial regions may be classified as desert biomes, rainforest biomes, grassland biomes, temperature deciduous forest biomes, tundra biomes, northern coniferous forest biomes, savanna biomes, and mediterranean biomes.

Because these biomes are mostly defined in terms of dominant vegetation or plant species, they are determined by rainfall and temperature.  In general, higher latitude biomes are further away from the equator, less sunlight and heat- this results in drier climates with less rainfall and lower, cooler, temperatures.

Answer:

What best describes how transferrin is transported through the erythrocyte plasma membrane is receptor-mediated endocytosis.

Explanation:

The incorporation of transferrin across the erythrocyte membrane depends on a transferrin receptor expressed on the surface of the membrane. The specific receptor recognizes the presence of iron-charged transferrin, transferin diferrica, incorporating it into the cell by endocytosis. Once in the cytoplasm, the iron is dissociated from the transferrin.

Free transferrin is called apotransferrin. The transferrin receptor has a high affinity for transferrin di-ferrica, which facilitates its incorporation by endocytosis, and the release of apotransferrin into the extracellular space.

The other options are not correct because:

    A. Exocytosis implies the exit of substances from the cell.

    B. Pinocytosis involves the invagination of the membrane to incorporate soluble substances into the cell.

    C. Phagocytosis is the incorporation of solid substances by invagination of the membrane.

Answer:

b. Increase the length of the poly(A) tail of the mRNA prior to transfection.

Explanation:

Polyadenylation is the addition of a long chain of adenine (A) nucleotides at the 3' end during RNA processing. This resultant chain is known as poly(A) tail. A poly-A tail generally has a size of 100-250 residues long. The poly(A) tail increases the stability of the messenger mRNA prior to the translation by slowing down its degradation rate over time. The process of polyadenylation enables RNA transcripts to be exported from the nucleus in order to be translated by ribosomes in the cytoplasm.

Answer:

Explanation:

A place to live water and food is the correct answer

The three selected options are place to live, water and food.

The physical conditions needed for survival of organisms are referred to as biological needs. The same applies to human body which cannot operate and will ultimately fail if these conditions are not satisfied.

All organisms really want five things for survival: fresh air, clean water, food, shelter, and sleep.

Biological needs are important because they are essential to survival. Without air, sunlight, food, water, shelter, sex etc. organism cannot or it is hard to survive.

Thus, the three selected options are place to live, water and food.

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Answer:  The Leber's hereditary optic neuropathy (LHON) is caused by defective genes contained in mitochondrial DNA.

Explanation:

LHON is causes the vision loss. This occurs due to mutation in the mitochondrial DNA. The symptoms are not associated vision loss thus it is difficult to predict that which member of family was the carrier of the disease. Some people do not get completely blind. A young male is expected to develop a risk of 50% development of this disease.

Answer:

A) Spore capsules

Explanation:

Ferns produce spore capsules contained in the sporangium (plural: sporangia), a structure localized on the undersides of the leaves. Moreover, the sporangia are borne in clusters known as sori (singular sorus). The spores are single reproductive cells that, when mature, are released from the sporangium to germinate on soil and produce new ferns. In a fern sporangium, the maximum number of spores is 64, although this number depends on the species.

Answer:

they can make only their own type of cell

Explanation:

A P E X

Answer:

they can make only their own type of cell

Explanation:

Ape-x

Answer:

The correct answer would be = t = 2.112 billion years

Explanation:

Given:

The number of crystal of uranium = 275 billion

The number of crystal of lead = 1925 billion

The half-life for 235U = 704 million years

Formula using :

N = N0e−λt

where,

no. of daughter atoms = N

at time t= 0, No. of parent atoms = N0.

Time  = T

Half life = 0.693/λ

Decay constant = λ

Solution:

by putting value in the formula of the half-life

λ = 0.693/0.704

λ = 0.9844

Now, putting value in the formula for the age of granite.

275 = (275+1925)e^-0.9844 t

1/8= e^-0.9844 t

e^0.9844 t = 8

taking log

0.9844t = 2.07944

t = 2.112 billion years

The granite that contains zircon crystals with 275 billion 235U atoms and 1925 billion 207Pb atoms is 2112 million years old.

From the given information:

the total number of parent atoms is equal to the total number of ²³⁵U atoms

Now, from these 2200 billion atoms, 1925 billion of ²³⁵U atoms has changed to Pb²⁰⁷ atoms.

So when the number of half-life is:               the parent atom is:

0                                                                      2200 billion

1                                                                        1100 billion

2                                                                       550 billion

3                                                                       275 billion

It implies that the parent atoms have passed through three half-life;

Thus, the age of the granite(parent atom) is calculated as:

age of granite = n × [tex]\mathbf{T_{1/2}}[/tex]

age of granite  = 3 × 704 million years

age of granite  = 2112 million years

Therefore, the age of granite is 2112 million years.

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Answer:

interphase

Explanation:

this is the resting stage where the cell grows and gets ready for division

Answer:

interphase

Explanation:

Answer:

Earth's rotation, geothermal activity, gravitational forces

Explanation:

Tectonic movements refers to movement occurring within the earth's crust.

The rotation of the earth on it's axis releases significant amounts of gravitational energy that results in deformation and movement of the earth's crust and mass redistribution of the tectonic plates.

Some of the main forces by which earth's rotation affects tectonic movements are:

Tidal friction due to the gravitational force of the Moon as well the Sun on the earth's crust; and change of the shape of the earth due to small displacements of the rotational pole with respect to the earth's crust.

Geothermal activity is caused by the transfer of heat from depth to the earth's surface. Convection currents in the mantle drive tectonic movements. Within the mantle of the earth, molten magma rises to the top while hot cold solid rock sinks to the bottom setting up a flow known as mantle convection. The rising and sinking motions of materials deform the outer surface of the earth producing earthquakes, mountain ranges, and volcanos on earth.

Two gravitational forces- slab pull and ridge push- cause tectonic movements. Slab pull occurs where gravity pulls

the edge of a cold, dense plate into the asthenosphere due to its weight dragging the entire rigid plate along.

Ridge push occurs when material from a mid-ocean ridge when cooled and thus becoming denser, slides down a raised but weaker asthenosphere due to gravity and push outwards on the lithosphere farther away from the ridges, allowing hot magma from the mantle to flow upwards again.

Answer:

Earth's rotation, geothermal activity, gravitational forces

Explanation:

i got it right on the test so hope this helps :)

Answer:

Red blood cells have no nucleus

White blood cells are used in the immune system

Skeletal muscle cells are striated

Cartilage cells make up the cartilage matrix

and Neurons have extensions

Hope this helps

Answer:

c. Spindle fibers

Explanation:

In eukaryotic cells, the centrioles are small sets of microtubules composed of tubulin proteins. Moreover, in animal cells, a centrosome is an organelle localized near the nucleus which contains a pair of centrioles. These organelles (centrosomes) are referred to as microtubule-organizing centers. During Anaphase, centrioles move to opposite sides in the cell in order to organize the spindle fibers and separate the chromosomes during cell division.

Answer:

Promoter.

Explanation:

It is promoter because Promoter is a DNA sequence where's the gene transcription begins. It is the

DNA sequence which RNA polymerase binds or join to

so as to begin transcriptionn of a gene . It is a region where the regulatory elements i.e protein will bind to and the Promoter sequences are found directly upstream or at the end of 5' of the transcription initiation site. This can also encode RNA such as mRNA, trans and so on.

Answer:

melanopsin

Explanation:

this note might help you :

The retinohypothalamic tract (RHT) is a photic neural input pathway involved in the circadian rhythms of mammals. The origin of the retinohypothalamic tract is the intrinsically photosensitive retinal ganglion cells (ipRGC), which contain the photopigment melanopsin. The axons of the ipRGCs belonging to the retinohypothalamic tract project directly, monosynaptically, to the suprachiasmatic nuclei (SCN) via the optic nerve and the optic chiasm. The suprachiasmatic nuclei receive and interpret information on environmental light, dark and day length, important in the entrainment of the "body clock". They can coordinate peripheral "clocks" and direct the pineal gland to secrete the hormone melatonin.

information about melanopsin : Melanopsin is a type of photopigment belonging to a larger family of light-sensitive retinal proteins called opsins and encoded by the gene Opn4.[5] In the mammalian retina, there are two additional categories of opsins, both involved in the formation of visual images: rhodopsin and photopsin (types I, II, and III) in the rod and cone photoreceptor cells, respectively.

Answer:

Answer

Explanation:

Sea breezes occur during hot, summer days because of the unequal heating rates of land and water. During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean.