Prehistoric people used what for knives and arrowheads

Answers

Answer 1

Answer:

spears

Explanation:


Related Questions

Which of the following is an example of
an organism's niche?
A. A dog chasing its tail
B. A bird fell out of its nest
C. The little boy is late for school
D. The early bird gets the worm

Answers

Answer:

A. dog chasing its tail

Answer:

D

Explanation:

One who arrives first has the best chance for success, 

what kinds of bacteria are spherical, endospores,cocci, bacilli, spirilla

Answers

The cocci kind of bacteria are spherical in shape. Rod-shaped bacteria are bacilli, and spiral-shaped bacteria are called spirilla. Thus, the correct option is C.

What are the cocci bacteria?

A coccus or cocci bacteria is any bacterium or archaeon which has a spherical, ovoid, or generally a round shape. Bacteria are categorized into different classes on the basis of their shapes into three classes which are cocci (spherical-shaped bacteria), bacillus (rod-shaped bacteria) and spiral (two types: spirillum and spirochete bacteria).

Different classes and examples of bacteria are Streptococci, in which cocci are arranged in chains. Example: Streptococcus mutans. Diplococci, in this cocci are arranged in pairs. Example: Neisseria gonorrhoeae. Monococci are single cocci. Staphylococci are the clusters of cocci. Example: Staphylococcus aureus.

Therefore, the correct option is C.

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Where is mRNA produced?

Answers

I think mRNA is produced in the nucleus

the answer would be in the nucleus

Cedar waxwings are one species of bird that is adapted to


withstand our cold winters. Bird watchers in Barrie provide


cedar waxwings with seeds at birdfeeders during winter


months. K/


UTI


(a) Would the seeds alter the carrying capacity of the


ecosystem? Explain.


(b) Provide a hypothesis that explains why bird watchers have


noted an increase in the falcon population in recent years.

Answers

Answer:

B)

Explanation:

Hope that helped! :)

"Definition" a. a characteristic that is not passed from one generation to the next in the genes but instead is acquired during the lifetime of an individual b. To mate two plants or animals to produce another generation c. A unit of DNA that determines a specific trait in an organism d. The transfer of traits from parents to their offspring e. A chart used to predict the proportion of offspring that will have a certain trait when two organisms are crossed f. A gene in a gene pair that is not expressed when paired with a dominant gene g. An organism that is the offspring of two similar organisms that are not the same species h. A gene in a gene pair that is always expressed i. A characteristic of an organism; for example, eye color, hair color, or height j. The science of heredity; the study of how traits are passed from parent(s) to offspring k. The discoverer of the basis of genetic theory l. When both genes from a homologous pair are identical m. Factors in the environment of an organism that limit the full expression of a gene n. A twisted and coiled strand of DNA within the nucleus that carries the codes for reproductive traits such as eye and hair color o. The strands of genetic material that determine traits of daughter cells (stands for deoxyribonucleic acid) p. When both genes from a homologous pair are different q. Two similar chromosomes; one from the mother and one from the father r. The links that hold the two sides of the DNA molecule together

Answers

Answer:

a, Acquired characteristics

b. Breeding

c. Gene

d. Hereditary or inheritance

e. Punnet square

f. Recessive gene

g. Hybrid offspring

h. Dominant gene

i. Trait

j. Genetics

k. Gregor Johann Mendel

l. H o m o z y g o u s

m. Environmental factors

n. Chromosome

o. DNA

p. Heterozygous

q. Homologous chromosome

r. Covalent bonds

Explanation:

An isotope is a different form of an element.
if two atoms are isotopes of the same element, then they will have the same number of which type of particle?

Answers

Answer:

Isotopes are atoms of the same element that contain an identical number of protons, but a different number of neutrons.

Explanation:

hope it helps

Which of the following represents a group of protists that is difficult to classify as either protozoan or algae because some species have chloroplasts, but others do not?

Answers

Answer:

some species have chloroplasts

Explanation:


How is food transported in plants?​

Answers

Answer:

through phloem the food is transported in plants

Explanation:

Hope its helpful

Give the word and chemical equations for respiration and photosynthesis

Answers

Answer:

PHOTOSYNTHESIS

carbon dioxide(CO2)+water(H2O)+sun light in the presence of chlorophyll(C55H72O5N4Mg)⇒glucose(C6H12O6)+oxygen(O2)+ATP(energy)

RESPIRATION

Glucose(C6H12O6)+Oxygen(O2)⇒carbon dioxide(CO2)+water(H2O)+oxtgen(O2)

Explanation:

I HOPE THIS WILL HELP YOU :)

The "master controller" gland is the _____. thyroid adrenal pituitary thalamus

Answers

Answer:

Hypothalamus is the correct answer to the given question.

Explanation:

Hypothalamus in the brain is the tiny portion of the mind also the Hypothalamus is situated at the foot of the nervous system .The Hypothalamus is just next to the pituitary gland. Hypothalamus is produced by a variety of nucleus as well as the nervous fibers. It's own neuronal links

The main objective of Hypothalamus is to hormonal fluctuation as well as  controlling the temperature of the body.All the other option is not the master controller gland that's why these are incorrect option .

Answer:

The pituitary gland is the master controller gland.

Explanation:

I just did this: The pituitary gland is sometimes called the "master" gland of the endocrine system because it controls the functions of many of the other endocrine glands.

What is the function of RNA polymerase in protein synthesis? a) It brings the tRNA to the ribosome. b) It bonds the DNA strand. c) It unzips the DNA strand. d) It translates the DNA strand.

Answers

Answer:

it has a DNA chromosome coz the dna molecule is packaged in to thread like structures called chromosomes..each chromosome is made up of dna tightly coiled many times around proteins called histons dat support its stracture

Answer:

The answer is C

Explanation:

just took the test and it was right:)

Seaweed belongs to which of Earth’s spheres?

Answers

Answer:

The answer is: Biosphere

Answer:

biosphere

Explanation:

biosphere in living things and seaweed is living hoped this helped

Which statement accurately describes one role of water on Earth?
Water in plants and animals transports nutrients into cells.
Water reflects sunlight that hits the oceans.
Water builds up rock and soil.
Water holds heat by trapping it within the equator.

Answers

Answer:

A

Explanation:

i took this a while ago

The statement that describe the role of water on Earth is Water in plants and animals transports nutrients into cells.

What is Water?

Water is a colorless, odourless and tasteless liquid which can be found on Earth

It is a universal solvent and it is of great abundance on it.

It is a ensures the existence of life on Earth.

Therefore, The statement that describe the role of water on Earth is Water in plants and animals transports nutrients into cells.

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It was once thought that decaying meat turns into maggots. Careful experimentation by scientist demonstrated that maggots actually come from fly eggs and not meat. These experiments illustrate that the new individual results only from reproduction and development

Answers

Answer:

True

Explanation:

Aristotle initially thought that life arose spontaneously and he backed this up by showing that a lump of meat left uncovered in a glass jar spontaneously produced maggots.

The spontaneous generation theory was later disproved by another scientist, Francesco Redi. He showed that a covered jar containing a lump of meat will not spontaneously produce maggots unless flies are allowed to perch and lay their eggs on the meat. The eggs of the flies give rise to the maggots and not the meat.

It thus showed that new life does not arise spontaneously but rather through development and reproduction.

Which pair of terms best describes a wooden table? biotic and nonliving biotic and living abiotic and nonliving abiotic and living

Answers

Answer: Non living biotic

Answer:

The liver is one of the vital organs of the body, responsible for hundreds of chemical actions that the body needs to survive. It is also a gland because it secretes chemicals that are used by other parts of the body.

Explanation:

What are bacteria that live in extreme conditions called

Answers

Answer:

extremophiles

Explanation:

live in conditions of extreme temperature acidity, alkalinity or chemical concentration

Extremeophiles is the correct answer

Which example is most likely made from both metals and gemstones?
Necklace
Soda can
Widow frame
Kitchen utensils

Answers

Answer:

A. necklace

Explanation:

Necklace  is most likely made from both metals and gemstones.

What is necklace?

A necklace might be a straightforward chain made of gold or silver, a string of beads or diamonds, or a pendant suspended from a rope. It qualifies as a necklace as long as it is worn around the neck.

Unless you are a professional or amateur geologist—or perhaps you earned a merit badge studying them as a scout—you probably won't be able to explain the differences between these four hard natural materials: minerals, rocks, gemstones, and crystals.

The different types of necklace are chocker, Matinee and opera. Long and functional, opera length necklaces. The necklace should hang below the bust when worn as a single strand.

Therefore, Necklace  is most likely made from both metals and gemstones.

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a small number of finches live in a protected bird sanctuary natural selection is like least likely to occur in this population​

Answers

Answer:

Natural selection

Explanation:

Answer:

Natural selection is least likely to occur because the birds are living in a protected sanctuary.

Explanation:

A protected sanctuary is important for protected species or "small numbered finches. Protected sanctuaries are made so that almost extinct species can start to repopulate without the effect of any natural selection.  

A pair of mice are bred several times generating the following data table. What are the most likely genotypes of the parents?

Answers

Answer:

This question lacks options, the options are:

A) FF and ff

B) FF and Ff

C) Ff and Ff

D) Ff and ff

The answer is D (Ff and ff for parent 1 and 2 respectively)

Explanation:

This question depicts a single gene coding for fur colour in mice. The gene controls two traits, black fur and white fur, encoded by alleles F and f respectively.

According to the question, a pair of mice has been bred several times to generate the same data of 22 black fur and 23 white fur mice. Based on this data, it shows that the phenotypic ratio of black to white mice is 1:1.

To get a 1:1 phenotypic ratio of black fur offspring to white fur offspring, the parents mice must have genotypes Ff (heterozygous) and ff (same recessive alleles).

In a cross between parents Ff × ff (see punnet square), offsprings with the following genotypes will be produced: Ff, Ff, ff and ff. Ff is black furred while ff is white furred.

Ff (2) : ff (2) is equivalent to Ff (1) : ff (1).

Hence, a data of 22 black mice and 23 white mice which represents a 1:1 ratio will only be produced by parents mice with genotypes: Ff and ff.

there are six elements that make up most of the human body. Which of the following is not one of these six elements?

Answers

Answer:

oxygen, carbon, hydrogen,

Explanation:

hope this helped u :)

What are some of the consequences of acid rain? Thanku

Answers

The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes. The more acid that is introduced to the ecosystem, the more aluminum is released, die of biodiversity in environment and other organism that supports decomposition of material

The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes.

For purposes of the law a mental disorder is:
Select one:
a. a disorder such as drug or alcohol dependence
b. all of the above are correct
оооо
C. any disorder or disability of the mind
d. a disorder such as learning disabilities

Answers

Answer:

C

Explanation:

if its a mental disorder i think it would be a disability of the mind

C. Any disorder or disability of the mind

An amoeba is a unicellular organism, which doesn’t have a stomach for digestion of food. How does food storage and digestion take place in an amoeba?

Answers

Basically it has chemicals that break down its food and it poops the left overs out

Help Resc
Mitosis can be broken down into 4 steps. The way to
remember what happens during metaphase is "middle"
Chromosomes are visable during metaphase. Where
are the chromosomes visible?
А
Outside the cell
B
The equator of the cell​

Answers

Answer:

The answer is option B

The equator of the cell.

Hope this helps.

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Te parece que se podra representar en una dramatizacion las acciones que se presentan en el texto "las obras de cocinero"? Which sentence best illustrates an appeal to ethos?A. How might future generations judge us if we fail to improve ourcity when we had the chance to do so?B. Think of the children who have to grow up in a concrete jungle,barren of soft grass and shady trees.C. A public park brings more foot traffic to the city center, increasingopportunities for local businesses to prosper.D. Living in the city for 10 years has shown me that public greenspaces are important.SUBMIT Increased Efficiency, Inc. is looking for ways to shorten its cash conversion cycle. It has annual sales of $36,500,000, or $100,000 a day on a 365-day basis. The firm's cost of goods sold is 65% of sales. On average, the company has $9,000,000 in inventory and $8,000,000 in accounts receivable. Its CFO has proposed new policies that would result in a 20% reduction in both average inventories and accounts receivable. She also anticipates that these policies would reduce sales by 10%, while the payables deferral period would remain unchanged at 40 days. What effect would these policies have on the company's cash conversion cycle Read the sentence.The movie is an invented story about the jazz scene, but it is interspersed with archival footage and photographs offamous poets and singers of the time.In this context what is the meaning of 'interspersed"?A. combinedB. comparedC. offeredD. shared U 3 4Lucy buys 7 kg of nuts to sell.She pays 10 for the nuts.Lucy puts all the nuts into bags.She puts 350 g of nuts into each bag.She then sells each bag of nuts for 75p.Lucy sells all the bags of nuts.Work out her percentage profit. Need help with these problems .( Its okay if u dont know all .Just do what you know) In 2019, Willow Corporation had three employees. Two of the employees worked full-time and earned salaries of $25,000 each. The third employee worked only part-time and earned $4,000. The employer timely paid state unemployment tax equal to 5.4 percent of each employee's wages up to $7,000. How much FUTA tax is due from Willow Corporation for 2019, after the credit for state unemployment taxes Biochemical changes in the body, that affect the rate of metabolism and elimination of a substance from the body and produce increased amounts to achieve the desired effects, may lead to development of The first two terms in a sequence are 8 and 11. What is the next value if this sequence is arithmetic? Plz HELP!!!!!!!!!!!!!!!!!!!!! What is your book genre?(If you read) When something is parallel to each other there what A certain mass of carbon reacts with 9.53 g of oxygen to form carbon monoxide. ________ grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions. Ethene is a useful substance that can form polymers. It has a melting point of 169C and a boiling point of 104C. At which temperature would ethene be a liquid? A 300 g bird flying along at 6.2 m/s sees a 10 g insect heading straight toward it with a speed of 35 m/s (as measured by an observer on the ground, not by the bird). The bird opens its mouth wide and enjoys a nice lunch.Required:What is the bird's speed immediately after swallowing? Juan told Sylvia he got a $0.50 raise this week and his new hourly rate will be $10.25 an hour. Sylvia wants to know what Juans hourly rate was before his raise. Which equation and solution can be used to solve this problem? r minus 10.25 = 0.50: Add 10.25 to both sides. The answer is $10.75. r + 0.50 = 10.25: Subtract .50 from both sides. The answer is $9.75. r minus 0.50 = 10.25: Subtract .50 from both sides. The answer is $10.75 r + 10.25 = 0.50: Subtract .50 from both sides. The answer is $9.75. The function of fx has been transformed to give go. Witch of the following functions represent gx? Rasheeda sees a garden in a book. She changes the scale because she wants a garden with different dimensions. The figure below shows both scales and a scale drawing of the garden.Book scale: 1 inch = 2 feet. Rasheeda's Scale: 2 inches = 3 feet. A rectangle with length A of 18 inches and width B of 6 inches.Which statements about the gardens are true? Select three options. A firm is considering a replacement project which requires the initial outlay of $300,000 which includes both an after-tax salvage from the old asset of $12,000 and an additional working capital investment of $8,000. The 12-year project is expected to generate annual incremental cash flows of $54,000 and have an expected terminal value at the end of the project of $20,000. The cost of capital is 15 percent, and the firm's marginal tax rate is 40 percent. Calculate the net present value of this project. which is a characteristic of a person with positive metal well-being?