An isotope used for absolute dating has a half-life of 100,000 years. Laboratory analysis of a crystal, which originally formed with only the parent isotope present, is now found to have a parent-to-daughter ratio of 1 :3. How long has it been since the crystal formed? *

A. 33,000 years
B. 50,000 years
C. 200,000 years
D. 300,000 years


Answers

Answer 1

Answer:

D.it has been 300,000 years


Related Questions

According to the diagram, during the last 40 million years, the structure of the horse’s foot has



lost its toes _


become smaller


grown toes


remained the same size

Answers

Answer:

gotten smaller

Explanation:

what are 2 ways to create a biome that will suppoert a cactus needs

Answers

Answer:

The second way is to put wet sand with rocks in the sand in the bottom of the bottle, then put dry sand next, get some water and dump it all in there with the plant in it. The advantages in the first one was the plant gets a good amount of water and cactus love water so that is one advantage.

We have concluded that the spiders have different traits for silk flexibility because the offspring inherited different combinations of gene versions from their parents.

The evidence supports this claim because . . .

Answers

We have evidence from different studies all over the world

The is concluded that spider silk flexibility varies because their offspring inherited different combinations of gene versions from their parents, demonstrating that spider silk quality is dependent on the gene present in it.

What is the significance of the spider's silk?

The quality of the spider silk is genetic, and due to this, some of the spiders do produce high-quality silk while others produce average or poor-quality silk, but the silk has many applications in various fields, such as biomedical fields such as in tissue engineering, drug delivery, and wound healing, due to its biocompatible, non-toxic properties.

Hence, it is concluded that spider silk flexibility varies because their offspring inherited different combinations of gene versions from their parents, demonstrating that spider silk quality is dependent on the gene present in it.

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What are the two sets of the chromosomes of the same type are called?
Diploid cells have 1 set of chromosomes that comes from?
Nervous system cells that are in the human body are?​

Answers

Answer:

What are the two sets of the chromosomes of the same type are called?

Homologous chromosomes

Diploid cells have 1 set of chromosomes that comes from?

The mom's egg and the other set comes from the dad sperm

Nervous system cells that are in the human body are?

Diploid

-TheUnknownScientist

Explanation:

homologous chromosomes

diploid

ANSWER FAST ILL GIVE BRAINLIEST!!!
What does it mean for a species to be in stasis?
The gene pool of the species is changing rapidly.
The species is not changing much.
The species is only found as fossils.
The species is in geographic isolation.

Answers

Answer:

the species is not changing much

Explanation:

another way you can think of this is homeostasis and that is a period of inactivity

The species is not changing much

how do some cells beomce brain cells and others become skin cells, when the dna in all the cells is exactly the same. In other words, if the instructions are exactly the same, how does one become a brain cell and another a skin cell?

Answers

Answer:

In other words, if the instructions are exactly the same, how does one cell become a brain cell and another a skin cell? it has the ability to turn off genes. The cell grows, makes a copy of its DNA, and prepares to divide into two cells.

Explanation:

hope this helps you.  

Answer:

Red blood cells make the different types of dna in the skin to convert and mutate the other skin cells

Explanation:

I had this question

Question in photo pls tell me which ever blue box is the Answer
help pls :(
Zoom in if needed
Thank you! :D

Answers

Answer:

The blank box (represents air)

Explanation:

The animal is biotic (living), the tree is also biotic (living), and the piece of wood also biotic (living.) The only abiotic factor in the photo, although we cant physically see it, is air.

When we burn fossil fuels, ____________ is released into the atmosphere.
A. water vapor

B. carbon dioxide

C. oxygen

Answers

Answer:

B. Carbon Dioxide

Answer:

carbon dioxide

Explanation:

hope this helped :)

Box A and Box B are both set in the sun at the same time and both have an initial temperature of 30 oC. After 30 minutes the final temperature for Box A was 32 oC and the final temperature for Box B was 42 oC. Which box was made of made of a material with a lower specific heat capacity?
Your answer:
Box A since its temperature increases slower
Box B since its temperature increases faster
Both had a the same specific heat
Specific heat has nothing to do with how fast or slow materials heat and cool

Answers

Answer:

Its not A

Explanation:

Answer:

It's B, "Box B since its temperature increases faster"

Explanation:

I don't know how to explain this properly but what I try to remember is the lower the Specific Heat Capacity = Better Conductor.

Question 6 (1 point)
Choose ALL that apply for mangroves.
Mangroves have bladders in their leaves to dilute the seawater.
Aerial roots act as support to hold their tops above water.
Mangroves han leaves that contain glands, which expel salty water.
Holes in the central stem take in air for the roots of the mangrove.

Answers

Answer:

Aerial roots act as support to hold their tops above water.

Mangroves has leaves that contain glands, which expel salty water.

Explanation:

A mangrove is a shrub that grows in coastal saline or brackish water due to their salt tolerance abilities. Aerial roots act as support to hold the plant in water as well as provide oxygen to the plants. These aerial roots are present outside the water so that to provide oxygen to the plants directly absorb from the atmosphere. Mangroves leaves contain glands, which removes salty water from the body so due to these glands, mangrove is able to grow in saline water.

In subduction what plate would be on top and what plate would be on the bottom?

Answers

Answer:

oceanic plate would slide under the continental plate

Explanation:

continental is on top, oceanic on bottom

Answer:

When an oceanic lithosphere meets a continental lithosphere in a subduction zone, the oceanic plate always goes under the continental plate. This is the rule because the rock making up an oceanic lithosphere is denser than in a continental lithosphere.२०२० मे

Why do animals need carbohydrates in their diets?
A) Carbohydrates can be used by the cells in the body for energy.
(В)
Carbohydrates are the building blocks for muscles and tissues.
©
Carbohydrates are used in the absorption of water molecules.
D
Carbohydrates provide insulation for organs in the body.

Answers

Answer:

A. Carbohydrates can be used by the cells in the body for energy.

Explanation:

Carbohydrates are the basic source of energy for all animals. Animals obtain their carbohydrates from the external environment (compared with plants, which synthesize carbohydrates by photosynthesis). About one-half to two-thirds of the total calories every animal consumes daily are from carbohydrates.

Hope this helps! (I would appreciate brainliest, if not that's okay!)

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A - Berkmar Biology S2 CA4 - AKS 13 / 11 of 24
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Help -
Habitat destruction causes issues for many different species because it gives them a smaller area to move around to look for food, shelter, or other resources. Which of the
following would be a possible solution to this problem?
O A Moving all of the animals to one forest away from cities
O
B. Killing all of the animals
O
C. Connecting the forests together
allow animals to move between the forests
O D. Constructing a large wall around the city so the animals and humans are separated

Answers

C is the best solution

Which of these organisms provides evidence that mitosis is used for reproduction in some species
A.amoeba

B.ant

C.bluebird

D.jellyfish

Answers

An organism that provides evidence that mitosis is used for reproduction in some species is known as Amoeba. Thus, the correct option for this question is A.

What is Mitosis?

Mitosis may be defined as a type of cell division through which a parental cell is successfully divided into two daughter cells. These daughter cells are genetically identical to the parental cell and are diploid in nature. Somatic cells of the body generally divided this process.

Amoebas are single-celled organisms that reproduce asexually through binary fission. Reproduction occurs when an amoeba doubles its genetic material and creates two nuclei. In this process of reproduction, an individual divides itself into two daughter cells similar to mitosis.

Therefore, an organism that provides evidence that mitosis is used for reproduction in some species is known as Amoeba. Thus, the correct option for this question is A.

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Which is the first step in the process during the formation of molded fossils?
Sediment hardens into rock.
O Sediment is eroded from rock.
O Organisms are buried under sediment.
O Organisms' shapes are preserved in rock.

Answers

Sediment is eroded from rock

Answer:

HI, there your answer is

Organisms are buried under the sediment.

Explanation:

Hope this helps :)

What would happen to
offspring if crossing over did
not occur?

Answers

Answer: If crossing over did not occur during meiosis, there would be less genetic variation within a species. ... Also the species could die out due to disease and any immunity gained will die with the individual. Two types of gametes are possible when following genes on the same chromosomes. If crossing over does not occur, the products are parental gametes. If crossing over occurs, the products are recombinant gametes.

Explanation:

Animal and Plant Cell Organelles Use the drop-down menus to determine where these organelles can be found. Ribosome Endoplasmic reticulum Golgi apparatus Cell wall Vacuoles Lysosomes Mitochondria Cell membrane Cytoplasm Chloroplasts

Answers

Answer:

Animal Cell:

Ribosome, Endoplasmic reticulum, Golgi apparatus, small Vacuoles, Lysosomes, Mitochondria, Cell membrane, Cytoplasm.

Plant Cell:

Ribosome, Endoplasmic reticulum, Golgi apparatus, Cell wall, Big Vacuole, Lysosomes, Mitochondria, Cell membrane, Cytoplasm, Chloroplasts.

Explanation:

                          Animal Cells                              Vegetable Cells

Cell wall                          NO                                             YES

Vacuoles       YES, Small and more than ones     YES, Only one and big

Chloroplast                      NO                                        YES

Plasmatic membrane       YES                                            YES

Mitochondria                       YES                                         YES

Lysosomes                       YES                                           YES

Endoplasmic reticulum      YES                                           YES

Golgi apparatus                   YES                                           YES

Cytoplasm                            YES                                           YES

Ribosome                             YES                                           YES

Both the animal and plant cells are eukaryotic. They carry their genetic material in the nucleus and mitochondria. Organelles are located in the cytosol, and both of them are surrounded by a protector cell membrane.

However, they have some differences:

Cell wall: A rigid structure that provides support and protection.

Animal cells do not have a cell wall. They are only surrounded by the cell membrane, which is flexible, so they can adopt different shapes. Plant cells have a wall, so their shape is usually prismatic and regular. The cell wall is composed mainly of cellulose.

Chloroplast: these are organelles that accumulate chlorophyll.

Animal cells do not have chloroplasts because they do not photosynthesize. Plant cells have chloroplasts, and they are in charge of the photosynthesis process that allows plants to release oxygen. These organelles use solar light as the source of energy.

Vacuoles:

Animal cells have many and small vacuoles whose function is to store water, ions, and waste intracellular substances. Plant cells have a unique big-sized vacuole that might occupy almost 90% of the cell. Their principal function is to store water and keep the turgidity. When the vacuole gets empty, the plant loses rigidity.

Other differences are:

The animal cell has centrioles, while the vegetable cell does not.

Plasmodium, chromoplasts, and glyoxysomes are present in the vegetable cell but not in the animal cell.

Surface mining for coal involves removing all the vegetation and rock above the coal being mined. Which two of Earth's subsystems are most immediately affected by surface mining? Select one: A. Biosphere and hydrosphere. B. Geosphere and biosphere. C. Hydrosphere and atmosphere. D. Atmosphere and geosphere.

Answers

Answer:

B. Geosphere and biosphere.

Explanation:

Earth as a planet can be subdivided into subsystems called "spheres". The spheres that make up the Earth are as follows; geosphere or lithosphere, hydrosphere, atmosphere, biosphere etc.

As related to this question:

- The GEOSPHERE refers to the solid part of the Earth, which involves rocks, minerals etc. of the Earth crust. It can be regarded to be the physical land.

- The BIOSPHERE refers to a collection of all the living organisms inhabiting the Earth. This includes plants, animals, microbes etc.

According to these question, surface mining for coal is an act that involves removing all the vegetation and rock above the coal being mined. This means that the physical land/rocks (geosphere) and vegetation of plants (biosphere) covering the coal beneath are affected. Hence, based on the explanation above, GEOSPHERE and BIOSPHERE are two of Earth's subsystems most immediately affected by surface mining.

If the ocean current starts near the equator, can it warm up the air of any location it passes? *
Yes
No​

Answers

Answer:

NO

Explanation:

Areas near the equator receive more direct solar radiation than areas near the poles. However, these areas do not constantly get warmer and warmer, because the ocean currents and winds transport the heat from the lower latitudes near the equator to higher latitudes near the poles

Which sediment do you think can store the most water?

Answers

Answer:

silt 3

Explanation:

an aquaferis a rock layers that stores and allows the flow of groundwater

Sediment that can store the most water is an aquifer.

What is an aquifer?

By definition, an aquifer is a geological unit where water infiltrates and stores and can be used as a source of supply. Generally, when penetrating into porous layers, almost always of sedimentary rocks, the water goes through a natural filtering process, making it suitable for consumption.

Whit this information, we can conclude that Sediment that can store the most water is an aquifer.

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could someone answer 3, 4 and 5 for me please? i’ll give you brainliest answer or whatever :).

Answers

Answer:

2. In the natural environment, plants produce their own food to survive. As with photosynthesis, plants get oxygen from the air through the stomata. Respiration takes place in the mitochondria of the cell in the presence of oxygen, which is called "aerobic respiration".

3.  Both cellular respiration and fermentation are process that break down food and convert the chemical energy stored in the food to ATP molecules. Both these processes begin with glycolysis and convert glucose to pyruvate. ... Fermentation only uses the latter.

4. Energy is usually absorbed during photosynthesis.

Photosynthesis is the process whereby green plants manufacture their food in the presence of sunlight(energy source), water and carbon dioxide:

       6CO₂    +     6H₂O          →           C₆H₁₂O₆          +       6O₂

                                                ↑

                                         Sunlight

Sunlight supplies solar energy that is used to converted the chemical species into glucose that stores chemical energy.

 Respiration is the reverse of photosynthesis. In this reaction, oxygen gas combines with glucose to produce energy with water and carbon dioxide as by products. The energy stored in photosynthesis is released during respiration.

            C₆H₁₂O₆          +       6O₂           →   6CO₂    +     6H₂O  ↑ energy

Explanation:

Answer:

2. The process of respiration in plants involves using the sugars produced during photosynthesis plus oxygen to produce energy for plant growth. As with photosynthesis, plants get oxygen from the air through the stomata.

3. Both cellular respiration and fermentation are process that break down food and convert the chemical energy stored in the food to ATP molecules.

4. Energy is usually absorbed during photosynthesis.

Photosynthesis is the process whereby green plants manufacture their food in the presence of sunlight(energy source), water and carbon dioxide:

       6CO₂    +     6H₂O          →           C₆H₁₂O₆          +       6O₂

                                                ↑

                                         Sunlight

Sunlight supplies solar energy that is used to converted the chemical species into glucose that stores chemical energy.

 Respiration is the reverse of photosynthesis. In this reaction, oxygen gas combines with glucose to produce energy with water and carbon dioxide as by products. The energy stored in photosynthesis is released during respiration.

            C₆H₁₂O₆          +       6O₂           →   6CO₂    +     6H₂O  ↑ energy

Los hidrocarburos se forman con la Unión de los elementos carbono e hidrógeno hay dos grandes grupos que son:

Answers

Answer:

Alcanos, alquenos y alquinos.

Explicación:

Los hidrocarburos se forman con la unión de los elementos carbono e hidrógeno, hay tres grandes grupos de hidrocarburos que son alcanos, alquenos y alquinos. Estos hidrocarburos se dividen en grupos según el tipo de enlace. Los alcanos son los hidrocarburos que contienen enlaces simples entre átomos de carbono, los alquenos tienen un doble enlace entre átomos de carbono, mientras que los alquinos contienen un triple enlace carbono-carbono.

Help pleaseee, someone

Answers

oxygen and hydrogen will have a covalent bond

sodium and chlorine will bond as an electron

oxygen an iron will have a ionic bond

calcium and fluoride will have an ionic bond

ᴄᴀɴ ᴀɴʏʙᴏᴅʏ ɢɪᴠᴇ ᴍᴇ ꜰɪᴠᴇ ꜰᴜɴ ꜰᴀᴄᴛꜱ ᴀʙᴏᴜᴛ ᴛʜᴇ ᴀꜰʀɪᴄᴀɴ ꜱᴛʀᴀᴡ ᴄᴏʟᴏʀᴇᴅ ꜰʀᴜɪᴛ ʙᴀᴛ?

Answers

These bats are very social bats and stay in huge colonies ranging from one hundred thousand to one million bats, both male and female included, and during migration their numbers are higher. Since they live in tight knit communities but are suspicious of outsiders, they are one of the most secretive specie of bat, preferring to keep their colonies and hide out. These bats can live over twenty years.

The largest danger and predator of straw-colored fruit bats are humans. In some areas, such as West Africa, straw-colored fruit bats are hunted and consumed for their meat because they are considered a delicacy.

PLEASE HELP I WILL GIVE BRAINLIEST with3

Answers

Answer:

Erosion and gravity

Explanation:

Erosion weathers away rock and sediment and moves it to a different location. gravity moves broken pieces of rock and sediment downslope.

What kinds of organisms can carry out photosynthesis?

Answers

Answer:

Plants, algae, and a group of bacteria called cyanobacteria are the only organisms capable of performing photosynthesis.

Explanation:

Which of the following do ALL living things need in an ecosystem? select all that apply
matter
sunlight
energy
soil

Answers

Answer:

sunlight, energy

Explanation:

i dont really have an explenation

it is sunlight energy

What is the function of the hormone progesterone? preparation of the body for maintaining pregnancy development of male secondary sex characteristics development of female secondary sex characteristics preparation of the fallopian tube for fertilization.​

Answers

Answer:

A !!!!!!!!!!

Explanation:

Progesterone is a hormone released by the corpus luteum in the ovary. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy. It may also be involved in the growth of certain cancers.

The function of hormone progesterone is  to prepare the body for  maintaining pregnancy.

What is progesterone?It is a steroid  hormone involved in the menstrual cycle, pregnancy and embryogenesis of humans and other species.It is released by corpus luteum and prepares the body for conception.Mainly stimulates the uterus for maintaining pregnancy.Also regulates the monthly menstrual cycle.

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What does uranium do to the environment

Answers

Uranium in air exists as dust that will fall into surface water, on plants or on soils through settling or rainfall causing it to harm humans and animals . If you inhale uranium there is a chance you can get lung cancer

Does myostatin defiency make you grow muscle faster then normal?

Answers

Answer:

Deficiency in myostatin resulted in increased muscle mass (1, 6, 15–18), but that this increase was not accompanied by a proportionate increase in force generation.

Explanation:

These findings clearly indicate that the increase in muscle mass of myostatin mutant animals confers no strength advantage over wild-type controls.

Hope this helps!

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