what drives a mass extinction ?
Answer:
Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes. One famous mass extinction event is the one that lead to the extinction of dinosaurs, 65 million years ago.
hope this helps
There is a multitude of evidence that supports how life has changed over time due to variation in the gene pool of different species. Which of the following choices below represents a scientific theory that explains these changes? *
A. As environments and ecosystems change over time, those that acquire suitable traits are more likely to survive and reproduce and the gene pool changes because organisms must adapt to survive and reproduce.
B. As environments and ecosystems change over time, those with variations for traits that are more successful in the new conditions are more likely to survive and reproduce, thus changing the allele frequency in the gene pool.
C. Because the environments and ecosystems show little change over time, organisms are already adapted for surviving in their given habitats for which they are made.
D. Because the environments and ecosystem show little change of time, the organisms that choose to adapt to different environments will migrate and become suited for new habitats.
Answer: A. Environmental drivers plus genetic variation in the population result in natural selection
Explanation: over geological time environmental conditions change. Organisms do not survive in one environmental niche with traits adapted to a possible future change that might suit those traits. Adaptation is not a matter of choice: adapt if possible or go extinct.
There is a (badly named) concept called pre-adaptation, which is that variations in some existing trait render adaptation to a different environment more likely.
Answer:
A
Explanation:
Which of the following is found in all organisms?
o chloroplast
O lysosomes
nucleoli
ODNA
Choose all the answers that apply.
Ground tissue
stores extra food
supports the plant
is found in plants and animals
Omakes up the majority of a plant
Dis responsible for photosynthesis
Answer:
stores extra food
is responsible for photosynthesis
supports the plant
makes up the majority of a plant
Explanation:
Ground tissues are one of the three types of plant tissues (others being dermal and vascular). They are composed of cells as follows: parenchyma, collenchyma, and sclerenchyma. These three cells that make up the ground tissues perform different functions in the plant cell.
- Parenchyma functions in photosynthesis and storage of extra food (carbohydrates) in the cell.
- Collenchyma functions in the support of young regions of the plant
- Sclerenchyma, which has the thickest cell wall, functions mainly in the strengthening/support of the plant cell.
Also, among the three tissue types in a plant, ground tissues make up majority of the plant cell.
The work of Charles Darwin and Alfred Wallace on the origin of the Earth's species extended the ideas of Lyell's uniformitarianism
into the biological sciences. The theory of evolution is based on the principle that the diversity seen in the Earth's species can be
explained by the
es
A)
random variation in the genetics of any population.
B)
idea that in any population, too many individuals are produced.
uniform modification of genetic traits over long periods of time.
D)
sudden change in the gene pool due to mutations within the DNA of a
given population.
Answer:
Explanation:
Newww album next week,
The mass of a proton?
☁️My Answer☁️:
The mass of the proton is the sum of the mass of current quarks and the binding gluons. The mass of the proton is-
⬇️
Proton mass mp = 1.672621898(21)×10−27 Kg
The Mass of proton is higher than the mass of electron.
☼Mass Of Proton In Other Units☼:
The mass of the proton can be expressed in alternative units like – proton mass AMU, the mass of the proton in kg, proton mass MeV. The table given below comprises the value of proton mass and corresponding units.
✯Proton mass✯: ∞Value∞:
Mass of the proton in kg 1.672621898(21)×10−27 kg
Mass of the proton in grams 1.672621898(21)×10−24 g
Mass of proton in AMU 1.007276466879(91) u
Proton mass MeV 938.2720813(58) MeV/c2
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And I do hope you enjoy the rest of your day! (ɔ◔◡◔)ɔ ♥
-Kirby ★ ツ ✌
Please please please please help me please
Answer:
A. Bees and Butterflies receive food while pollinating the flowers.
The diagram below shows the morphological change of two species.
Which statement explains why species 1 and species 2 are different?
Natural selection can cause gradual speciation changes.
Natural selection favors traits that can transmit through generation.It can leads to a new distinctly different species.What is natural selection?It is the process through which populations of living organisms adapt and change to new environment conditions and pass these genes to next generations.
Define speciation?It is how a new species of an organism is created.It occurs when a group within a species separates from other members of its species and develop its own unique characteristics.To know more about natural selection here
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What is sexual
reproduction? What is the advantage of this method of reproduction?
Sexual Reproduction - type of reproduction that involves two parents
Advantage - more genetic diversity in species
Study the diagram of a cell.
Which structures are found in both plant and animal
cells?
O W and X
O W and Z
O X and Y
Y and Z
Help me please
Protists vary in structure and function more than any other group of organisms. However, here are some common traits: a.All have membrane-bounded organelles, and so are ___________________. b.Most are single-celled, or ___________________________. c.They get their food in several ways. Some contain chloroplasts and do photosynthesis, and so are considered __________________. Others ingest food particles and so are ____________________.
Answer:
a. eukaryotes
b. unicellular
c. autotrophs; heterotrophs
Explanation:
Protists represent a separate kingdom of eukaryotic organisms (ie., organisms whose cells have a nucleus). The most important features of protists include: 1- they are unicellular organisms, 2-contain mitochondria, 3-can be parasites, and 4-generally live in optimal conditions in moist or aquatic environments. In the past, protists were divided into Protozoa (animal-like organisms) and Protophyta (plant-like organisms), which nowadays we know are heterotrophic (also often parasitic) and photosynthetic protists, respectively.
According to scientists, all of the bodies in the universe came from a rotating cloud of gases and dust about
billion years ago.
O 3.5
O 2.5
O 4.5
O 1.2
It's either 3.5 or 1.2
There would be more evidence spread out through space to be noticed by scientists and it seems like a stretch to go as far back as 4 billion years ago.
(I mean really? That much before the DINOSOURS died? I don't think so)
◕‿◕
Hope this helps
Miri
PLZZ HELP CORRECT GETS BRAINLIEST!! PLZZ SHOW PROOF
Muticellular organisms, cells are organized into tissues, tissues into organs, organs into organ systems, and system into organisms.
Answer:
Explanation:
.
C6H12O6 + 6O2 --> 6H2O + 6H2O
How many total atoms of oxygen are on the reactants side?
SELECT AN ANSWER
6
12
18
2
Answer:
18
Explanation:
6 in C6H12O6 and 12 (6×2) from O2
Therefore, 12 + 6 = 18
If the moon moves farther away from the earth the earths oceans will experience what? 
Answer:
flatten out, less waves, become more calm, no more tides
Explanation:
C6H12O6 + 6O2 --> 6H2O + 6H2O]\
Is the equation above balanced?
No; there are un equal numbers of each type of atom on both sides.
No; the mass of reactants and products do not equal one another.
Yes; it has equal numbers of each type of atom on both sides.
Yes; the mass of the reactants are equal.
Answer:
no
Explanation:
the carbon isnt there at all
Silicon dioxide (SiO2) and aluminum oxide (Al2O3) are the two most abundant compounds in the _______.
A.
universe
B.
Earth's oceans
C.
Earth's atmosphere
D.
Earth's crust
Answer:
Eath's crust
Explanation:
Silicon dioxide (SiO2) and aluminum oxide (Al2O3) are the two most abundant compounds in the Earth's crust. This explains why oxygen, silicon, and aluminum are the three most abundant elements in the crust.
The most abundant compound in the universe is water.
Match the term to its definition.
control group, data, hypothesis, inference
observations that may be quantitative or qualitative
a tentative, testable scientific explanation
useful for determining the effect of the independent variable
a logical interpretation based on prior knowledge
Explanation:
hypothesis is the last one
data is the 3rd one
inference is the 2nd one
and control group is the first one
process of elimination is your best friend
which of the following statements about enzyme function is true
Answer:
What are the rest of the answer choices?
Your question is incomplete, please read below to find the full content.
Option C. Enzymes increase the rate of chemical reactions by lowering activation energy barriers.
Which of the following statement about enzyme or their function is true?Enzymes are globular proteins that have three-dimensional structures. They do not alter the overall change in free energy required for the reaction and they lower the activation energy to speed up the reaction. So, all of these options are right and the correct answer is D.
Which statements are true enzymes?The correct answer to this question is A) Enzymes lower the activation energy and the ΔG produced from a reaction. Enzymes act as catalyzing agents that are responsible for the faster formation of products in different biochemical reactions.
The options are missing in this question.
A. Enzyme function is independent of physical and chemical environmental factors such as pH and temperature.
B. Enzymes increase the rate of chemical reactions by providing activation energy to the substrate.
C. Enzymes increase the rate of chemical reactions by lowering activation energy barriers.
D. Enzyme function is generally increased if the three-dimensional structure or conformation of anenzyme is altered.
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The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best at what temperature and pH? *
The graph is attacged and the options is as follows:
Temperature of 27oC and a pH of 4
Temperature of 37oC and a pH of 6
Temperature of 40oC and a pH of 8
Temperature of 50oC and a pH of 10
Answer:
The correct answer would be - temperature of 37oC and a pH of 6
Explanation:
The graph 1 shows the relation between the rate of reaction for an enzyme and the temperature of reaction is been represented. In this graph the rate of eaction is highest (point from the slope starts decreasing) at the So, by the options and graph the temperature 37°C(Below 40°C) rate of reaction is maximum.
Similarly, in other graph rate of reaction and and pH has been represented in which rate of reaction is maximum at pH 6. after 6 pH the rate of reaction started decreasing.
Which type of fossil is formed by sediments and found in sedimentary rock?
O mold of a fish
O petrified wood
• carbon film of a leaf
O preserved insect
Answer:
C
Explanation:
Trust me on this, also can I have brainlest.
Please help!!!!!!!!!!!!!
Some organisms, such as bacteria, reproduce asexually; whereas, other organisms reproduce
sexually. Which statement correctly states why one type of reproduction is beneficial over the
other?
A. Asexually reproduced offspring are more genetically diverse.
B. Asexual reproduction produces offspring genetically different from parents.
C. Sexual reproduction can produce a large number of offspring very quickly.
D. Sexual reproduction produces organisms that are genetically diverse.
Answer:D
Explanation: A isn't right because during asexual reproduction there is no exchange of genetic characteristics thus the offsprings retain the genetic characteristics of their parents and there is no diversity.
Sexual reproduction on the other hand involves the fusion of gametes and the exchange of genetic characteristics thus the offsprings are diverse and are not identical to their parents as is the contrary in asexual reproduction.
Sexual reproduction produces organisms that are genetically diverse.
Sexual reproduction involves the combination of chromosomes from both parents. This combination of chromosomes introduces variation into the population. This combination does not occur in asexual reproduction.
Hence, the statement that correctly states why one type of reproduction is beneficial over the other is that sexual reproduction produces organisms that are genetically diverse.
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(31) The rough endoplasmic reticulum
(A) has ribosomes bound to it
(B) is part of the membrane system found throughout the cell’s cytoplasm
(C) is connected to the nuclear envelope
(D) all of the above
All of the above are correct
yoink hehehehhehhehhhhhehehehehhehehhehehehehe
Answer:
yasssssssssssssssssssss
Explanation:
I NEED HELP PLEASE!!!
Answer:
I believe it is convergent boundaries
Explanation:
Answer:
C convergent boundaries
Carbohydrates like glucose can undergo spontaneous rearrangement to give an alternate configuration for the anomeric carbon when the ring is free in solution. However, when glucose is covalently attached to another sugar through C1, this rearrangement cannot occur. Consequently, the configuration of carbohydrate oligomers and polymers is fixed. Why can't glucose rearrange when in a polymer form?
Answer:
The presentation according to another circumstance is categorized in the following section.
Explanation:
Glucose constructs anomers because of the extreme involvement of flexible metal-carbon because that continues to exist as something of a monomer. However, when plastics are established, transformation is limited with glycoside formation of complexes among both anomeric carbon atoms.
Sucrose, besides obvious reasons, would be manufactured by glucose and fructose, which have been connected by something like a glycerol backbone involving glucose carbon atom as well as fructose. The mechanism including its creation of anomers even by movement through carbon becomes called "Mutarotation" Sucrose doesn't always show mutation.What is the danger posed by introduced species? *
O Non-native species might have no natural predators in their new environment
Non-native species can occupy space and crowd out indigenous species
Non-native species might prey on native species threatening extinction
All of these are dangers posed by introduced species
Which of these causes the day/night cycle on earth
Answer:
Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
Explanation:
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good luck
Answer:
Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
Explanation:
:) hope this helps!
Which statement best explains the relationship between cellular respiration and photosynthesis?