Intervals of geologic time are bound by important events, like mass extinctions or the appearance of animals with hard parts. The first single-celled organisms appeared about 3.5 billion years ago. Many sea animals first show up in the Cambrian period of the Paleozoic era. That was about 545 million years. It is sometimes referred to as the Cambrian explosion because it happened relatively quickly. It lasted just over 50 million years. The next period, , the Ordovician, ended with mass extinctions of 60% of all marine invertebrates. Dinosaurs wouldn't appear for over 200 million years, during the Jurassic period in the Mesozoic era. Based on the passage, in geology, 50 million years is A an era. B not considered a very long time. C too short for any significant events to occur. D about how long dinosaurs were on the planet.​

Answers

Answer 1

Based on the passage above, in geology, 50 million years is not considered a very long time (Option B).

What is geological time?

Geological time is an expression used to describe processes that occurred on a high time scale.

Geological processes such as the emergence of species (speciation) can take millions of years.

The processes on a geological time scale are difficult to commensurate from a human thinking perspective.

In conclusion, based on the passage above, in geology, 50 million years is not considered a very long time (Option B).

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Related Questions

70 points! b) How do scientists make a person's genes fluoresce? (2 points)

Answers

Scientists make a person’s genes fluoresces by having to name a variety of chromosomes on what color would variant. What would it do is that it can find it’s whole color scheme in order to locate the chromosomes which is basically a spectral karyotype.
By using multiple probes labeled with a mixture of different fluorescent dyes, scientists are able to label each chromosome in its own unique color.

Tundra is not a good growing environment for corn because: true or false

Answers

Explanation:

The Tundra is very cold climate so it would be hard to grow anything there such as corn

answer please. will give brainliest

Answers

Answer:

I think it would be an organ! sorry if not

(GIVING BRAINLIEST!!)

What type of moisture does Colder air hold than hotter air?

Answers

Answer:

An oft-repeated water vapor myth is that warm air can “hold” more water vapor than cool air because as the air warms its molecules move farther apart, making room for more molecules.

Explanation:

:)

When Mendel crossed the P
(parent) generation, what did
he call the generation
produced by the P
generation?
re
A. P2
B. F1
C. F2

Answers

Answer:

B. F1

Explanation:

Plants used in first-generation crosses were called P, or parental generation, plants (Figure 8.3). Mendel collected the seeds produced by the P plants that resulted from each cross and grew them the following season. These offspring were called the F1, or the first filial (filial = daughter or son), generation.

Green plants capture and store light energy from the Sun through the process of-

a) cell division
b) respiration
c) homeostasis
d) photosynthesis

Answers

Answer:

D photosynthesis

Explanation:

photosynthesis is what make the plant green

The answer is d: photosynthesis hope this helps

Snow falling from the clouds has
potential energy
kinetic energy

Answers

Answer:

Kinetic Energy

Explanation:

the parathyroid _____ blood calcium by taking the calcium from the _____

Answers

Answer:

Parathyroid hormone is secreted by the parathyroid glands and is the most important regulator of blood calcium levels.

The parathyroid maintains blood calcium by taking the calcium from the bones.

What is the parathyroid gland?

The body requires exact calcium levels since even tiny variations can lead to problems with muscles and nerves. The following processes are stimulated by the parathyroid hormone: bones' release of calcium into the blood. The intestines' absorption of calcium from meals.

The thyroid glands create the parathyroid hormone, which aids in preserving the appropriate level of calcium in the blood and in tissues that require calcium for optimal function.

This is particularly crucial for bone health as well as nerve and muscle function. The bones, kidneys, and small intestine are directly impacted by the parathyroid hormone.

PTH increases the release of calcium from the bones in an indirect manner through osteoclasts, which eventually results in bone resorption.

Therefore, parathyroid maintains blood calcium by taking the calcium from the bones.

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Play‘s the steps for the formation of enzyme pepsin the pepisnogen in the correct order

Answers

Answer:

The DNA strands unwind, and RNA polymerase binds to the template strand.

The synthesis of mRNA begins.

The mRNA undergoes intron splicing and exits the nucleus.

The tRNA moves through mRNA with the activated amino acids. attached to it.

The amino acids assemble.

Explanation:

there

how do the molecular components in carbohydrates compare to the molecular components in amino acids?

Answers

Answer:

I'm in the stars tonight so watch me be the fire and light the

9th grade biology. 10 pts
photo provided -

Answers

Correct answer - Glucose molecules.

Why? - During digestion, starch is partially transformed into maltose by the pancreatic or salivary enzymes called amylases maltase secreted by the intestine then converts maltose into glucose. The glucose so produced is either utilized by the body or stored in the liver as glycogen (animal starch).

Give at least two examples. will mark brainleist!

Answers

Answer:

1. Red blood cells: It produces hemoglobin, an oxygen-carrying protein.

2. White blood cells: It produces soluble protein called antibodies.

3. Muscle cell: It produces the muscle protein known as myosin.

Explanation:

The above are some of the specialized cells in multicellular organism. The red blood cell is in charge of carrying oxygen in the body. It contains/produces hemoglobin which is the protein the cell also produces. The hemoglobin also gives the blood cell its red color.

The white blood cell, also known as leukocyte is the component of the blood cell which defends the body against infections. The cell is highly mobile within the body and moves to the site of infection in order to defend it. It produces antibodies that actually defend the body against infections.

The muscle cell are the cells within the human body that help to make the movement of cell to be possible. It produces myosin which also combines with actin, another muscle protein.

During _________, the chromosomes line up along the equatorial plate.

Answers

Answer:

During METAPHASE the chromosomes line up along the equatorial plate.

The answer is metaphase II

What is one question that you have about genetics?​

Answers

How are genetic modifications being regulated

Explain the three events in sexual reproduction that contribute to genetic variation in a population.

Answers

Is that question from school

The variety in DNA sequence seen in each of our genomes is referred to as genetic variation.

What is Genetic Variation?

We are all different from one another in terms of our hair color, complexion tone, and even the form of our features due to genetic variance.

The role of genetic diversity in evolution is crucial. Genetic variety that is passed down from one generation to the next is what drives evolution. Favorable traits are "selected" for, persist, and are transmitted. Natural selection is what causes this.

Mutations are adjustments made to the genetic code. (For the majority of life, this entails a change in the DNA sequence.) A single mutation can have a significant impact, but evolutionary change frequently results via the accumulation of many small-impact mutations.

Therefore, The variety in DNA sequence seen in each of our genomes is referred to as genetic variation.

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A mature plant cell is different from a mature animal cell because the plant cell has?

Answers

Answer:

large central vacuole

Explanation:

mature plant cell contains large vacuoles while a animal cell has small vacuoles

A mature animal cell is different from a mature plant cell because of the plant cell has differentiation ability.

Mature plant cell can still divide and differentiate to produce a complete new plant.

The mature animal cells cannot differentiate into the other cells to produce all the different cells that can form a complete animal.

Therefore, A mature animal cell is different from a mature plant cell because of the plant cell has differentiation ability.

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The "how do atmospheric conditions influence weather patterns" lab report pleaseee

Answers

Changes in atmospheric pressure signal shifts in the weather. A high-pressure system usually brings cool temperatures and clear skies. A low-pressure system can bring warmer weather, storms, and rain. Meteorologists express atmospheric pressure in a unit of measurement called an atmosphere.

Answer:

im trying to find it too bro.

Explanation:

what is vegetative propagation​

Answers

Answer:

Explanation:

methods produce new plants from vegetative parts of the original plant, such as the leaves, stems and roots. These

Answer:

Vegetative reproduction is any form of asexual reproduction in plants specifically their leaves, roots and stems. In this process, a new plant grows from a fragment of the parent plant or a specialized reproductive structure. Many plants naturally reproduce this way, however it can also be completed artificially.

The processes that transform inputs to outputs are what part of a system?
A. the surroundings
B. the components
C. the flow
D. the boundary

Answers

Answer:

(C) The flow

Explanation:

The processes that transform inputs into outputs are the flow part of the system that is presented in Option C, as the flow determines the efficiency and effectiveness of the system.

What is the significance of the flow in the system?

The flow in the system has many implications, such as how it transforms inputs into outputs and it is a crucial part of a system, and it explains how the inputs are transformed and the output for the respective inputs. The flow affects the system's overall performance and helps manage the outcomes of the system by achieving its desired roles or functions.

Hence, the processes that transform inputs into outputs are the flow part of the system that is presented in Option C, as the flow determines the efficiency and effectiveness of the system.

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Which is an example of a parasite and host relationship? A) a chlorophyll and a green plant B) a wolf and a rabbit C) a tapeworm and a human D)sunlight and green plants

Answers

Answer:

C) a tapeworm and a human

Explanation:

A parasitic relationship is defined as the relationship between two organisms in which one organism called parasite fed over other organism called host and parasite get benefits while the host get harmed.

From the given options, relationship between a tapeworm and a human is a parasitic relationship because a tapeworm act as a parasite in human body. Parasite gain food or nourishment while human body loses its nourishment.

Hence, the correct answer is "C) a tapeworm and a human".

Answer:

C: A tapeworm and a human

Explanation:

C is the correct answer

Definition of infrared?

Answers

Answer:

noun

1.

the part of the invisible spectrum that is contiguous to the red end of the visible spectrum and that comprises electromagnetic radiation of wavelengths from 800 nanometers to 1 millimeter.

adjective

2.

noting or pertaining to the infrared or its component rays:

infrared radiation.

Explanation:

got it from dictionary.com

17 Some Birds with shorter beaks enter into a population of birds with much
longer beaks, resulting in the hatching of birds with in-between sized beaks.
Which No evolutionary mechanism are most likely responsible for this
scenario

A mutation and genetic drift

B natural selection and artificial selection

C gene flow and recombination of genes

D artificial selection and crossing over during melosis

Answers

I think it’s c because the birds have different beak sizes it could be mutation or different genes

The evolutionary mechanism that are most likely responsible for this  scenario is:

C gene flow and recombination of genes

According to the given question, some birds are said to have shorter beaks and when they mate with birds that have longer beaks, they produce offspring that have in-between size beaks.

The evolutionary mechanism that is in charge of this phenomenon is simply gene flow and recombination of genes. This is because there is a combination of genes from the parents and given to the offspring.

The shorter beaks and the longer beaks of the parents combined and the offspring got in-between beaks.

Therefore, the correct answer is option C

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what's the name of the Era were dinosaurs reign is called?​

Answers

Answer:

the mesozoica era

Explanation:

all 3 arw the triassic.jurassic and creataceous periods

Answer: Mesozoic Era

Explanation:

Bounded by the end-Permian and KT extinction events.

Uncontrolled cell division is characteristic

Answers

Answer:

Uncontrolled cell division is often, but not always, a characteristic of cancer.

Explanation:

Answer:

Uncontrolled cell division is a characteristic of tumors/cancer.

As a cell grows larger, the surface area of the cell increases much more rapidly than the volume of the cell.
True or false?

Answers

Answer:

true

Explanation:

As a cell grows bigger, its internal volume enlarges and the cell membrane expands.

True Answer!!!!!!!!!!!

Explain the changes
3 marks

Answers

Answer:

The correct answer is - increase in the number during this period in the lake which suggests there are plenty of resources during this period required for the growth of the algae.

Explanation:

In the given graphical representation, there is a continuous increase in the number of algae present in the lake during the period of time between February to June. There is some fluctuation found in mid-April and early June but it is negligible.

This continuous increase in the number of algae suggests that during this period the resources are in abundance that affects the growth of the alage.

The Human Genome Project was begun in 1988 by scientists from 13
nations as a worldwide effort to understand the sequencing of all of the
DNA in the human body. What is one potential scientific benefit of this
research?

Answers

Answer:

The Human Genome Project was begun in 1988 by scientists from 13 nations as a worldwide effort to understand the sequencing of all of the DNA in the human body. What is one potential scientific benefit of this research? a. It will create communication between research centers

The Human Genome Project was begun in 1988 by scientists from 13 nations as a worldwide effort to understand the sequencing of all of the DNA in the human body potential scientific benefit of this researchar It will create communication between research centers.

What did the human genome project discover?

The Human Genome Project specified the full set of human genes, sequenced them all, and finds some of the alleles, mainly those that can cause disease when they get altered.

Genes can be viewed relative to physical characters of the chromosome, or relative to other genes.

Thus, he Human Genome Project specified the full set of human genes, sequenced them all, and finds some of the alleles, mainly those that can cause disease when they get altered.

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What happens when a low air pressure system meets a high air pressure system? (2 points)

Group of answer choices

The temperature of the air drops to below freezing.

The air moves to the low pressure system, creating wind.

The precipitation is removed from the air.

The air starts blowing in an easterly direction.

Answers

Answer:

the air moves to the low pressure system creating wind

Explanation:

Answer: B

Explanation:

What are the sex chromosomes? Explain how it is shown in male and female; and karyotyping

Answers

Answer:

Females have two X chromosomes, while males have one X and one Y chromosome. A picture of all 46 chromosomes in their pairs is called a karyotype. A normal female karyotype is written 46, XX, and a normal male karyotype is written 46, XY.

Explanation:

Sex chromosomes are chromosomes which are responsible for sex determination. These are the X and Y chromosomes. Females have two X chromosomes and males have one X and one Y chromosome in their sex cells/gametes. Karyotyping is the visualization of chromosomes after blocking the cells in mitosis and staining; this allows us to identify the size, shape, and number of chromosomes present in cells, which is significant because extra, missing, or abnormal chromosomes can cause developmental problems or issues with body functions.

Which product of photosynthesis is the most vital to other organisms?

Answers

The answer is oxygen!! :)
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