Biology Middle School

Which is a reason that many organisms that have existed on Earth have left

no fossils?

O

A. Fossils cannot form underwater.

O

B. Fossils can only form near volcanoes.

O

C. Fossils decay according to their half-life.

O

D. Many organisms live only in rainforests.

SUBMIT

Answers

Answer 1

Fossils decay according to their half-life is the correct answer because half life is the criteria for fossilization.

Why some organims did not form fossils?

That organisms which became fossils are protected from destruction after death by their environment or their structures that fossilize well.

So we can conclude that Fossils decay according to their half-life is the correct answer because half life is the criteria for fossilization.

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Answer 2

D, many organisms live only in rainforest

Related Questions

Describe the three steps of the lock and key model of enzyme function.

Answers

The specific action of an enzyme with a single substrate can be explained using a Lock and Key analogy first postulated in 1894 by Emil Fischer. In this analogy, the lock is the enzyme and the key is the substrate. Only the correctly sized key (substrate) fits into the key hole (active site) of the lock (enzyme).

which molecule loses electrons during cellular respiration?

Answers

Answer:

glucose

Explanation:

Two species of fish had recently undergone sympatric speciation. The males of each species had a different coloring through which females could identify and choose a partner from her own species. After some time, pollution made the lake so cloudy it was hard for females to distinguish colors. What might take place in this situation?

Answers

Answer:..............

Explanation:

Which statement describe a pattern shown in the data?

Answers

The data from trial 3 are inconsistent with the dat as from trials 1 and 2

In a new trial to test the effectiveness for a new type of medicine, why is it necessary for one group to receive a placebo?

Answers

Answer:

To serve as control experiment.

Explanation:

Hope it helps.

It is necessary in order to have a control group.
Explanation:
By having a placebo group one can observe whether or not the one with the new type of medicine have any consistent and real changes after taking the medicine.


Which factor is most important for classifying two species into the same
group?
A. The species live in the same place.
O B. The species have different common ancestors.
O C. The species have the same common name.
D. The species have the same set of traits.
SUBMIT​

Answers

Answer:

d

Explanation:

ap3x

The factor used in classifying two species into the same group is D. The species have the same set of traits.

What are traits in a orgaism?

Character traits csn be regarded as the valued aspects of a organism behavior.

When making classification, especially two species into the same group, traits serves as important factor because it list the characters in the organism.

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Which base is found only in DNA?
adenine
O guanine
o cytosine
thymine

Answers

Answer:

DNA: adenine (A), thymine (T), cytosine (C

), and guanine

But thymine is only found in dna

and it is replaced by uracil in the rna

Thymine, in rna it is replaced

Katie wants to see if apples that are kept cold will rot or stay edible. She places an apple in the refrigerator and records the date. What should she use as a control?

(a) Keep an apple in freezer

(b) Keep an apple in boiling water

(c) Keep an apple in cool place

(d) Keep an apple in warm place

Answers

B because it is the opposite of it sitting in the cold

polar climate precipitation

Answers

Answer:

The average temperature of the warmest month at less than 10 ºC (50 ºF).

Explanation:

The annual temperature range is large. Precipitation: The region is dry with less than 25 cm (10 inches) of precipitation annually; most precipitation occurs during the summer. hope this helps you :)

Answer:Polar climate precipitation is the average temperature of the warmest month at less than 10 degrees celsius (50 degrees celsius).

Explanation:Polar climate regions are characterized by lack of warm summers.Polar climates tends to be extremely dry since the descending cold air does not have a significant amount of moisture.The two polar regions are usually identified as key regions for monitoring global change,because the surface air temperature and precipitation is expected to increase especially rapid in these two regions along with the ongoing increase of atmospheric carbon dioxide.

Which of the following is an example of a homologous structure?
1.Eyeballs
2.Bird wings
3.Bat wings
4.Wisdom teeth

Answers

I think the answer is 3

Answer:

Explanation:

Which of the following is an example of a homologous structure?

  Eyeballs

Two cities have smokestacks on their plants. Which of the following weather conditions would you expect to create an increase in air pollution dispersal for one of the cities?

The city with a higher air pressure
The city with a higher humidity
The city with a lower wind speed
The city with a lower temperature

Answers

Answer:

The city with a higher air pressure

The city with lower wind speed

*ANSWER PLS N TY* How does water scarcity in certain places result in hunger for the people? a.) Water is needed for proper sanitation. b.) When wetlands dry up, more biodiversity occurs. c.) Polluted water causes disease. d.) Water is needed to grow successful crops.

Answers

Answer: D water is needed to grow successful crops

Answer:D

Explanation: Crops need water for transpiration and evaporation. The plant roots suck or extract water from the soil to live and grow, without this crops won’t successfully grow. This should help :)

Check
Match each type of fossil to its description
petrified fossil
X
hollow form
mold
solid copy
carbon film
living thing turned to rock
cast
X
record of an organism's activity
trace fossil
detail left after an organism decays

Answers

Answer:

mold - hollow form

carbon film - detail left after an organisms decay

living things turned to rock - petrified fossil

trace fossil - a record of an organisms activity

cast - solid copy

how did the modern atomic theory develop?

Answers

From Dalton to the Periodic Table. Modern atomic theory begins with the work of John Dalton, published in 1808. ... The best evidence for his theory was the experimentally verified law of simple multiple proportions , which gives a relation between the weights of two elements that combine to form different compounds.

In the diagram, the feature labelled C is only found in plant cells. What is it called?

Answers

Answer:

Should be the Chloroplast

Explanation:

Since its green and only plants have it, the way they produce energy is using Chloroplasts..

In the diagram, The cell organelle labeled as c is the chloroplast

The plant cell contains structures that are cell walls, chloroplast, vacuoles that are absent in an animal cell.

Reason:

cell wall present on the outside of the plasma membrane labeled as Evacuoles are the single but largest cellular structure in the plant cell and are present in the center.

Chloroplasts:

The chloroplast is an organelle found in plants and other photosynthetic organisms.The chloroplast contains chlorophyll that gives the plant its green color.Chloroplasts capture light energy to conserve free energy in the form of ATP and reduce NADP to NADPH through photosynthesis.The chloroplasts also have a double outer membrane.  chloroplasts are minute flattened granules.

Thus, In the diagram, The cell organelle labeled as c is the chloroplast

Which of the following is the conversion factor used to convert light-years to
miles?
A.
5.9 X 102 miles
1 light-year
B.
1 light-year
5.9 trillion miles
C.
1 light-year
5.9 million miles
D. 1 light-year = 5.9 x 101 miles

Answers

Answer:

5) 1 light year. = 5.9 trillion miles

1 light year = 5,878,625,373,183.69 miles

1 light year. = 5.9 trillion miles

Descnbe how technology causes change
-Biology

Answers

Answer:

a technological change is an increase in the efficiency of a product or process that results in an increase in output, without an increase in input. ... Processes or products, such as the telephone, move through technological change in three stages: Invention - the creation of a new product or process

Explanation:

Which statement best describes the difference between vascular plants and
nonvascular plants?
O A. Vascular plants reproduce with seeds, and nonvascular plants do
not.
O B. Vascular plants reproduce with spores, and nonvascular plants do
not.
C. Vascular plants have vessels, and nonvascular plants do not.
O D. Vascular plants have flowers, and nonvascular plants do not.
SUBMIT​

Answers

The correct option is A. Vascular plants reproduce with seeds, and nonvascular plants do not.

The following information should be considered:

A vascular plant contains vascular vessels to carry water and food to all the different parts of the plant. While on the other hand, Nonvascular plants are most commonly found in moist environments, which assured they get sufficient water without relying on roots.

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Will Mark Brainliest

Which of the following products were created through marine biotechnology?

Penicillin

Plasma television

Fluorescent dyes

Lithium batteries

Answers

Answer:

penicillin is the answer

Penicillin. The first name for Penicillin was “mould juice.” Scottish bacteriologist Alexander Fleming accidentally discovered this said antibiotic in 1928. When he got back from vacation, Fleming found a green mold called Pennicilium notatum that had contaminated some Petri dishes in his lab and were killing some of the bacteria that he had been growing.

Which of these elements is a metal

Answers

Answer:

iron, copper, mercury, aluminium, silver, lead, indium, zinc, sodium, potassium, old, tin, platinum, manesium, chromium, nickel, titanium, cobalt, calcium vanadium, bismuth and so on.

Explanation:


Atoms have a _______
surrounded by _____

A. positive electron, negative nuclei
B. negative electron, positive nuclei
C. negative nucleus, positive electrons
D. positive nucleus, negative electrons

Answers

Atoms Have A Positive Nucleus, Surrounded By Negative Electrons.

Which include the male and female sex cells?
gametes
chromosomes
eukaryotes
diploids

Answers

i think the answer is gametes

Answer:

gametes

Explanation:

Which question is most closely related to the field of biology? A. What are most rocks made of? B. what is the average length of a cobra? C. What is the mass of the moon? D. How fast does the earth rotate?

Answers

Answer: a

Explanation:

the length of a cobra doesn't help with the study of life. The moon doesn't either because there is no life on the moon. And how fast the earth rotates is more of a earth science question. I hope this somewhat helps

Explanation:

what is the average Length of a cobra is related to biology because a cobra is a reptile and other options are related to geography

In addition to being an airway, the _______ is the location of the human vocal cords.

Answers

In addition to being an airway the LARYNX is the location of human vocal cords.

Answer:

the larynx

Explanation:

it is the organ forming an air passage to the lungs and holding the vocal cords in humans and other mammals also known as the voice box.

Which option identifies one section of the ocean floor?
intertidal zone
open ocean
neritic zone
transition zone

HELP

Answers

Answer:

c. neritic zone

A seabed or the ocean floor is the underwater structure that lies on the bottom of the ocean or sea. The oceanic floor comprises continental inclines and elevations, mid-ocean ridges, trenches etc.

The correct answer is:

Option C. Neritic zone.

This can be explained as:

The shallow region of the ocean is called the neritic zone that extends up to 660 feet of depths.

The sunlight is available and plankton's and other organisms can make their food.

It is the most prolific zone of the ocean because of the abundance of nutrients.

Organisms like sea anemones, crabs, sponges, dolphins, jellyfish etc. prevail in this zone.

Therefore, the neritic zone is the section of the ocean floor.

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What is the main term used to locate COPD in the alphabetic index

Answers

Answer:

Chronic obstructive pulmonary disease

Explanation:

I'm not 100%  sure of what you're asking here but the main term for COPD is Chronic obstructive pulmonary disease. COPD is a long-term lung disease, which makes breathing especially difficult. I hope this helps:)

What’s the importantance of the endosymbiotic

Answers

Endosymbiosis is important because it is a theory that explains the origin of chloroplast and mitochondria. It is also a theory that explains how eukaryotic cells came to be.

A silver mine recently opened along the foothills of a mountain. The mine's primary method for extracting silver from the surrounding rock is heap leaching. Which of the following hazards does this process most likely pose to the environment?
I. Atmosphere contaminated with heavy metals
II. Soil contaminated with cyanide
III. Surface water contaminated with sediment

Answers:
I only
II only
III only
I and II only

Answers

The answer is I AND II

Soil contaminated with cyanides is the hazard which is the most likely pose to the environment. Thus, the correct option is B.

What is Cyanide contamination?

Silver mining is the extraction of silver metal from minerals, starting with mining. Because of this silver, which is often found in the intimate combination with other metals, its extraction requires more elaborate and complex technologies.  

Cyanide in the landfills can contaminate the underground water. Hydrogen cyanide, sodium cyanide, and potassium cyanide are the major forms of cyanide which are most likely to be found in the environment as a result of industrial activities. Hydrogen cyanide is a colorless gas with a faint, bitter, almond-like odor. Concentrated acids and cyanides are used to dissolve metals from the rock which are picked up in rainwater.

 

Therefore, the correct option is B.

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Which structure is most likely used for hunting?

Answers

Answer:

A.claws

Explanation:

A. Claws because it has talons which are sharp and primarily used for grabbing into prey

All wetlands are considered freshwater ecosystem

Answers

Answer:

Marshes, swamps, and bogs are all considered wetlands. ... Wetlands are not considered freshwater ecosystems as there are some, such as salt marshes, that have high salt concentrations—these support different species of animals, such as shrimp, shellfish, and various grasses.

Explanation:

i hope this helps you!

Answer:

It will be false

Explanation:

Took on edg

Other Questions
Scores on the Critical Reading part of the SAT exam in a recent year were roughly Normal with mean 495495 and standard deviation 118118 . You choose an SRS of 100 students and average their SAT Critical Reading scores. If you do this many times, the standard deviation of the average scores you get will be close to 118100=1.18118100=1.18 . 118100=11.8118100=11.8 . 118100=1.09118100=1.09 . 118118 . The confidence interval on estimating the heights of students is given as (5.4, 6.8). Find the sample mean of the confidence interval. Find the equation of the parabola that has a vertex at (2,0) and a y-intercept of (0,12).Question 8 options:A) y = (x 2)2B) y = 3(x 2)2C) y = 3(x + 2)2D) y = (x + 2)2 Which of the following lines has a negative slope? If f(x) = 6x6x 9 and g(x) = (x + 6,which statement is true? What will be the answer for this? Please help me, please and thank you Jada sells her artwork at a trade show. She made $40 on the first day by selling one photograph, one painting, and one necklace. She made $110 on the second day by selling two photographs, three paintings, and three necklaces. She made $50 on the last day by selling one photograph, one painting, and two necklaces. Which system of equations matches Jada's sales at the trade show? Which describes where fog forms?(A) at the ground(B) in the upper atmosphere(C) where the air has very low humidity (D) where the atmosphere contains few particles f(x)=-3(x-3)-1 which of the following graphs corresponds to the function above PLS PLS HURRY!!!! 50 points!!Fred and Ted are racing cars down a frictionless track with a jump at the bottomwhen suddenly an argument breaks out. Fred says, If we release the cars from apoint twice as high as we are currently doing so, the cars will have twice thegravitational potential energy, and therefore be travelling twice fast when they hitthe jump." Ted says, In order to double the speed of the cars when they hit theramp, I think we will have to more than double the height!" Who is right? Prove it! What does the author mean with the phrase "we are the heirs of the agesA. It has been a long time since such a country existed.B. Only those born here can benefit from the hard work of others.C. The country offers great riches to those who work hard.D. We have inherited andmazing gift from our forefathers. 400 ml of a 75 M solution of H2SO4 is needed to for a lab. The stock solution is 16.0 M. Calculate how much stock is needed to make the solution. WILL MARK BRAINIES!!!!PLZ HELP!!!! The following answer choices contain a paragraph from a John Muir article. Read each answer choice and select the one that uses semicolons correctly. Two years ago, when picking flowers in the mountains back of Yosemite Valley, I found a book. It was blotted and storm-beaten; all of its outer pages were mealy and crumbly. The paper seemed to dissolve like the snow beneath which it had been buried; however, many of the inner pages were well preserved. And although all were more or less stained and torn, whole chapters were easily readable. This is the condition of the great open book of Yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book. Two years ago; when picking flowers in the mountains back of Yosemite Valley, I found a book. It was blotted and storm-beaten, all of its outer pages were mealy and crumbly. The paper seemed to dissolve like the snow beneath which it had been buried; however many of the inner pages were well preserved. And although all were more or less stained and torn; whole chapters were easily readable. This is the condition of the great open book of Yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book. Two years ago, when picking flowers in the mountains back of Yosemite Valley, I found a book. It was blotted and storm-beaten; all of its outer pages were mealy and crumbly. The paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. And although all were more or less stained and torn, whole chapters were easily readable. This is the condition of the great open book of Yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book. Two years ago, when picking flowers in the mountains back of Yosemite Valley; I found a book. It was blotted and storm-beaten, all of its outer pages were mealy and crumbly. The paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. And although all were more or less stained and torn; whole chapters were easily readable. 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