Answers
Related Questions
1. When did stromatolites appear on Earth?
Archean
Hadean
Mesozoic
Proterozoic
Answers
Answer:
Proterozoic
Explanation:
Stromatolites appear on Earth in the end of Proterozoic era because Proterozoic extended from 2500 million years to 542 million years. The stromatolites were present on earth about 542 million years ago. The stromatolites present in large number on the sea shores around the world and are considered as the Earth's first visible life form which can be seen through naked eye. These stromatolites were the first known organisms in which photosynthesis occurs and produce free oxygen..
Answer:
Archean
Explanation:
I took the test
1, Which of the following is not an organelle within a cell ?
A, nucleus B,chloro plast C ,mitochondria D, Cytoplasm
Answers
Answer:
B.chloroplast
Explanation:
chloroplast is gained from the sun through the cytoplasm organelle
Energy that comes from the Sun
1. chlorophyll 2.Photosynthesis
3.Radiant energy
4.Phytoplankton
Answers
Answer:
2
Explanation:
Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesise carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for sustaining the life processes of all plants.
Two interacting systems involved in plant transport are shown here. Which statement best describes the function of xylem and phloem in transporting substances throughout the plant?
Answers
Answer:
C. Xylem transport water and nutrients from the soil to the leaves while phloem transport carbohydrates from the leaves to the rest of the plant.
Explanation:
Which of the following best describes a relationship in this grassland?
A Badgers are top predators because they eat upland sandpipers and beetles.
B A producer-consumer relationship exists between lupines and ants.
C a predator-prey relationship exists between beetles and ground squirrels.
D upland sandpipers are primary and secondary consumers because they eat grasses and grasshoppers.
Answers
Answer:
D.
Explanation:
They consume both things that consume food and things that produce food.
10
What complementary mRNA is made from the following DNA strand AAG-CTG-CCT *
(1 Point)
TTC-GẠC-GGA
UUC-GAC-GGA
TUC-GAC-GGA
UUC-GUC-GGA
No Answer
Answers
Answer:
a
Explanation:
The integumentary and muscular systems work together interactively for which
main purpose?
a) When a cat feels threatened the muscles under their skin contract to extend
the hairs on their backs and tails.
b)When a baboon is ready to mate it secretes a hormone which turns their
backside red.
c) When a giraffe fights over territory they swing their muscular necks and strike
each other with their bony ossicones.
d)Goldfish and other fish species are covered in scales to protect them from
pathogens and disease.
Answers
Answer: When a cat feels threatened the muscles under their skin contract to extend
the hairs on their backs and tails.
Explanation:
mRNA
UGU UAU AUC GAA
Answers
Answer:
I can not see the picture?
Rocks are made of collections of mineral grains that are held together in a firm, solid mass. Rocks are identified primarily by the minerals they contain, their color, and their texture.
Based on this passage, you can infer...
A. Rocks are classified into three major groups
B. Rocks form from the cooling and hardening of molten rock
C. A rock's origin is the way it was formed
D. Each type of rock has a distinctive set of minerals
OMG PLSSS HELP ME PLS PLS PLS!!!!!!!
Answers
Answer:
Explanation: it’s a
If the statement is true, write true. If it is false,
change the underlined word or words to make
the statement true.
6. Cells were discovered using electron
microscopes.
7. Ribosomes produce proteins.
8. The cells of plants and animals lack nuclei.
9. Both DNA and RNA are proteins.
10. The cell membrane is selectively permeable.
ter of
Answers
Answer:
6.True
7.True
8.True
9. False, both RNA and DNA are nuclei acids. that are made from nucleotides
10. True
Explanation:
Answer:
6. False- light microspcopes
7. True
8. True
9. False- Nucleic Acids
10. True
which of the following scientists can be identified as a taxonomist?
Answers
Answer: Taxonomy is the science of naming, describing and classifying organisms and includes all plants, animals and microorganisms of the world. Using morphological, behavioral, genetic and biochemical observations, taxonomists identify, describe and arrange species into classifications, including those that are new to science.
Which change occurs in a fetus during the first trimester?
A. Rapid weight gain occurs.
B. Fingers and toes become well defined.
C. Eyes and ears become fully developed.
D. Central nervous system completes development.
Answers
Answer:
D. Central nervous system completes development
Explanation:
In the summer, coastal towns usually experience cool ocean breezes, as shown in the
Which process creates the type of ocean breeze shown?
Answers
Students learned that the job of one body system is to filter out cellular
wastes, toxins, and excess water or nutrients. Which body system has
this function? *
A. Excretory system
B. Muscular system
C. Endocrine system
D. Skeletal system
HELP ME PLEASE ❤️
Answers
Answer:
A. Excretory system
hope it helps
Describe how radio telescopes are used to explore space.
Answers
Answer:
A radio telescope is a form of radio receiver used in astronomy. In contrast to an "ordinary" telescope, which receives visible light, a radio telescope sees radio waves emitted by radio sources, typically by means of a large parabolic (or a "dish") antenna, or arrays of them.
Explanation:
The diagram shows a large pond that dried out and formed into two smaller ponds.
What type of speciation occurred in the fish?
A. allopatric
B. peripatric
C. parapatric
D. sympatric
Answers
Answer:
A. allopatric
Explanation:
Allopatric speciation consists of the geographic separation of a continuous genetic background -population-, giving place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate individuals, or geological events. In this type of speciation, some barriers impede genetic interchange or flow. The populations are separated by a barrier and can not get together and mate anymore. These barriers might be geographical or ecological.
When a geographical barrier emerges, this is known as a vicariant event. Vicariance is the geographical separation of a population imposed by discontinuities in the physical environment that divides populations that originally were continuous. The process of vicariant allopatric speciation involves different steps:
• The emergence of the barrier.
• Interruption in the genetic interchange
• The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation.
• Genetic divergence by natural selection and reproductive isolation makes it impossible for the two groups to mate even if the barrier disappears.
• Prezigotic isolation mechanisms favored by selection once a secondary contact between the new formating species occurs.
So in the exposed example, the original population was composed of fishes living in a pond under the same environmental conditions and selective pressures.
However, with time, the pond dried, causing a decrease in water level and the emergence of a new physical barrier. The original population got separated by a piece of ground, and the original pond turned into two smaller ponds. The physical barrier is now interrupting the genetic flow between both groups.
Animals on each pond suffer from different environmental pressures to which they need to adapt. New mutations occur, leading to genetic divergence between the two separated groups. Two species emerged, red fishes and blue fishes.
Please help what's the answer
Answers
Which of the following statements is correct?
A. Landfills solved pollution problems caused by waste disposal.
B. Wastewater from cities no longer carries toxic chemicals into waterways.
C. Laws regulating waste disposal have put an end to pollution problems caused by waste.
D. Much of the pollution in our environment is a byproduct of inadequate waste disposal.
Answers
Answer:
D
Explanation:
all the others are false
Much of the pollution in our environment is a byproduct of inadequate waste disposal, hence option D is correct.
What are the problems of waste disposal?There are some problems caused by solid waste disposal include: finding suitable landfill locations, groundwater pollution, and soil pollution.
Landfills have not solved pollution problems caused by waste disposal, because it creates soil pollution in the area where waste is disposed of, which decreases the fertility of the soil.
Wastewater from cities carries toxic chemicals into waterways, which is the major cause of water pollution in that area. There are some laws that regulate pollution, but not all the person follows them.
Therefore, waste disposal is the major factor of pollution.
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PLEASE HELP ASFFF
What were the results of the experiment and how did the results prove the semiconservative model of DNA replication? Explain.
Answers
Answer:
it can be shows in DNA Test
PLEASE HELP
Which of the following is not a random occurrence?
A selection of the best-suited traits for the environment, leading to adaptive evolution
Genetic drift changing the gene pool of a population and creating fluctuations in the allele frequencies
The bottleneck effect after an earthquake, resulting in a reduction of genetic variation
The founder effect, when a small population is isolated and the gene pool significantly reduced from the parent population
Answers
Answer: A selection of the best-suited traits for the environment, leading to adaptive evolution brainliest
Explanation:
Will give brainliest
Answers
Answer:
D
Explanation:
70 plus 30 = 100%
A short true-breeding plant will always produce a short plant.
True or false
Answers
Answer: false
Explanation:
Identify an organism in the food web that is tertiary and secondary consumer?
Answers
Answer:
Snake, lion, hawk
DON'T GIVE ME A LINK! ANSWER THE QUESTION!
A student wants to use cookies to make a model of the genetic makeup of the offspring of asexual reproduction. He has vanilla cookies and chocolate cookies available. How can he make his model?
A.
Put chocolate cookies in a row with arrows between them showing the progression from parent to offspring.
B.
Use one chocolate cookie parent with arrows showing that it produces vanilla cookies and chocolate cookies as offspring.
C.
Use chocolate cookies and vanilla cookies as the parents, and vanilla cookies and chocolate cookies as the offspring.
D.
Use chocolate cookies and vanilla cookies as parents, and combine half a vanilla cookie and half a chocolate cookie for the offspring.
(sorry if this sounds a little aggressive but I'm tired of people giving links to files that are dangerous for children, especially a site made up for children who knows how old. I don't want anything to happen to them that can traumatize them for the rest of their lives)
Answers
Answer: its D i hope
Explanation:
Apply Concepts Eventually, most people with Alzheimer's disease lose the ability to recognize common objects. Explain which lobe is affected at this point in the disease
Answers
Answer:
The right temporal lobe
Explanation:
The cerebral cortex of the brain has two sections known as hemispheres, and each hemisphere can be divided into four lobes: frontal, parietal, temporal and occipital. Alzheimer's disease is the most common cause of dementia, which is characterized by the damage of the temporal lobe. Alzheimer’s disease usually initiates in the hippocampus, which is a structure inside each temporal lobe. The temporal lobes are involved in different neuronal functions: object recognition, face recognition, perception, memory, language, emotions, etc. The right temporal lobe is mainly involved in processing visual information (i.e., face recognition, object recognition, familiar recognition).
4. While on the Galapagos Islands, Darwin observed variety in one type of
animal that was later used to help him form his theory of natural selection.
Which type of animal was this? *
Finches
Giant turtles
Lemurs
Bananas
Answers
Please help meeeeeeeeeweewwwwweeeeee
Answers
Answer:
the answers are D, E and G
Explanation:
help!
look at photo to answer
Answers
Compare the two Food Web. Which ecosystem would be more likely to survive if a disease killed the grass?
a The forest ecosystem, because the animals would be able to eat other organisms.
b The grassland ecosystem, because it has many herbivores.
c he grass ecosystem, because several predators compete for food
d The forest ecosystem, because it has 3 top predators
Answers
Answer:
A
Explanation:
just A, I remember doing this in like 4th or 3rd grade don't really remember but I makes sense
write two examples of consumers tell whether they are herbivores omnivores carnivors or scavengers
Answers
Answers
Lion,Tiger -Carnivores
vulture- scavenger
Cow,sheep -Herbivores
Man, Pig -Omnivores
In an ecosystem, consumers are organisms that obtain their energy and nutrients by feeding on other organisms. They are a vital part of the food chain, and they come in different sizes and types.
Consumers can be classified into several categories based on what they eat. For example:
Herbivores: These are animals that consume only plants for their food. Examples include rabbits, cows, and giraffes.Carnivores: These are animals that consume other animals for their food. Examples include lions, tigers, and sharks.Omnivores: These are animals that eat both plants and animals. Examples include humans, bears, and raccoons.Scavengers: These are animals that feed on the remains of dead organisms. Examples include vultures, hyenas, and some types of beetles.Consumers play an important role in an ecosystem, as they help to transfer energy and nutrients from one level of the food chain to another. They are an integral part of maintaining the balance and stability of an ecosystem.
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