Biology Middle School

Which life-forms appear to be extinct?
a. Sponges, Insects, and flowering plants.
b. Bony fishes, dinosaurs, and mammals
c. Sponges, insects, reptiles
d. trilobites, ammonoids and dinosaurs

Which life-form was most abundant 250 million years ago?
a. dinosaurs
b. reptiles
c. bony fishes
d. trilobites

Which Life-forms Appear To Be Extinct? A. Sponges, Insects, And Flowering Plants.b. Bony Fishes, Dinosaurs,

Answers

Answer 1

Answer:

D for the first question and B for the second

Explanation:

trust

Answer 2

Answer:1.) D (trilobites, ammonoids and dinosaurs)

2.) B (reptiles)

Explanation:

Based on the graft

Related Questions

As a colony of braconid wasps undergo metamorphosis, they live on a hornworm and digest its insides, causing the hornworm to die.This is an example of: Why:

Answers

Answer:

Paraitism.

Explanation:

By living on the hornworm and eating the insides, they harm it and cause it to die.

When are two populations likely to have very similar allele frequencies?

A. If the selective pressures are different
B. If there is a high mutation rate
C. If there is a large amount of genetic drift
D. If there is a large amount of gene flow

Answers

Answer:

c). If there was a large amount of genetic drift.

If the price of gene drift is excessive enough, then two populations will have equivalent allele frequencies and consequently can be taken into consideration as a single powerful population.

What causes allele frequencies to live equally?

Allele frequencies continue to be constant over the years due to the following: there is no considerable price of a brand new mutation. individuals with all genotypes are similarly able to mate and pass on their genes; that is, there's no choice against any precise genotype.

What are two impacts of allele frequencies of a population?

The natural choice, genetic drift, and gene go with the flow are the mechanisms that purpose modifications in allele frequencies through the years. while one or greater of those forces are appearing in a populace, the populace violates the Hardy-Weinberg assumptions, and evolution occurs.

Learn more about allele frequencies here:  https://brainly.com/question/850166

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"This leaf is 4 inches long."
What kind of observation is this?
A Quantitative
B. Qualitative
C Hypothetical
D. Inferential

Answers

The answer is A. Quantitative because Quantitative is observing amount, or quantity. Qualitative would be observing the quality, like color or shape. Hypothetical is making a hypothesis on the size, and finally inferential is would be saying you measured the leaf, I believe. A quick way to solve this would be to see if it involves numbers, and if so it’s a quantitative observation. If it involves color or shape or anything you observe with sight alone, it’s a qualitative observation. I hope this helps and sorry for the long answer, just trying to explain why A is correct.

All viruses causes diseases and are called parasites.. true or false please help

Answers

Answer:

False

Explanation:

theres this site called weegy just put weegy after every question and answers come up

false. parasites are different from viruses because they contain a defined nucleus. unlike parasites, viruses are not considered to be true living organisms. most viruses do not cause diseases, and many are beneficial to the host.

Which occurs when the body response to the environment by maintaining a stable internal environment despite changing external conditions

Answers

Answer:

homeostasis

Explanation:

Responding to the environment by maintaining a stable internal environment despite changing external conditions is characteristic of living things. The maintain of stable internal environment called homeostasis. Other characteristics of living things are: the possibility to produce, one or more cells, the possibility to grow and develop...

i hope i answered your question!

thanks,

Michael

The answer is Homoetisos

A red blood cell placed in distilled water will swell and burst due to the movement of Your answer: A.salt from the distilled water diffusing into the cell B.water molecules moving by osmosis into the cell C.water from the red blood cell moving into the distilled water

Answers

B is the correct answer

What do you predict would happen if you placed the smaller ball on the bottom, and the
large ball on top? Be sure to support your claim with evidence.

Answers

Answer:nothing

Explanation:even though a smaller object would have a great force, a larger ob will move the smaller object farther

A scientist decides to study the effect of salt on a particular type of bacteria. Arrange the steps of the scientific method in the correct order to
show how the scientist would proceed with his work.
The scientist asks the question,
Does salt help the growth of
these bacteria?
>
The scientist puts the bacteria in
three different environments:
high salt, medium salt, and low salt.
A microbiologist notices that
some bacterial species thrive
in salt water environments.
The scientist forms a hypothesis
that higher concentrations of salt
may increase the growth of these
types of bacteria.
The scientist publishes his report
in a scientific journal.

Answers

Answer:

yes it does help the growth of bacteria.

The correct order of the steps of the scientific method to show how the scientist would proceed with his work are: 2 - 3 - 4 - 5 - 6 - 7

What is the scientific method?

A microbiologist notices that some bacterial species thrive in salt water environments.The scientist asks the question, Does salt help the growth of these bacteria?The scientist forms a hypothesis that higher concentrations of salt may increase the growth of these types of bacteria.The scientist puts the bacteria in three different environments: high salt, medium salt, and low salt.The scientist collects and analyzes the data obtained from the experiment.The scientist draws a conclusion based on the results of the experiment.The scientist communicates the results and conclusions to the scientific community by publishing a report in a scientific journal.

Learn more about bacteria, here:

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Which of these is not used by the nervous system to instruct the endocrine
system?
O A. Synapses
O B. Neurotransmitters
O C. Blood vessels
O D. Neuroendocrine cells

Answers

Answer:

c

Explanation:

Answer:blood vessels

Explanation:trust me bro

Which of the following is an example of a chemical change?

A. Breaking wood
B. Melting ice
C. Bending metal
D. Baking bread

Answers

Answer:

D. Breaking bread is an example of chemical reaction.

D.Baking bread (The bread is being baked, therefore its a chemical reaction)

BIOLOGY EXPERTS HELP!!! Which of the following examples poses the greatest potential threat to an ecosystem’s biodiversity?

a) Abandoned farmland is allowed to go fallow and begins to fill in with weeds, shrubs, and saplings.
b) A nonnative species of bee is introduced to prey on the introduced species of fire ants in the Southern United States.
c) A monoculture of fir trees is planted on land that was once clear cut from deforestation.
d) The trapping and relocating of wolves poses a threat as they move into areas of high human population.

Answers

Answer:

b) A nonnative species of bee is introduced to prey on the introduced species of fire ants in the Southern United States.

Explanation:

:)

All of the following are effects of Global Warming EXCEPT



Your answer:


increase in hurricanes

lower sea levels

increase in disease


melting polar ice caps

Answers

Answer:

increase in disease

Explanation:

Which is NOT a role played by a type of RNA in protein synthesis?
O mRNA transcribes the DNA template.
rRNA makes up ribosomes, which translate the genetic code into a protein.
O tRNA pairs RNA bases with amino acids.
O pRNA is the product of chemically linked amino acids.​

Answers

Answer:

pRNA is the product of chemically linked amino acids.​

Explanation:

All the other choices are exactly the roles of RNA in protein synthesis: mRNA "messenger" RNA transcribes the DNA and travels out of the nucleus; then rRNA "ribosomal" RNA in the ribosome helps assemble the protein using the mRNA; tRNA "transfer" RNA brings amino acids to the assembly line of ribosome and mRNA.

There is no pRNA that I know of, although there are many types of other RNAs like piRNAs (piwi RNAs!) or siRNAs.

Compare and contrast nonspecific and specific defenses

Answers

Answer:

nonspecific immunity are things that protect the body from various bacterias, viruses, and pathogens. ... Specific immunity are things that protect the body from specific pathogens. It includes the third line of defense. They include the lymphocytes (white blood cells) such as the macrophages, t cells, and memory b cells

Explanation:

Which factor is NOT an environmental stimulus that plants respond to by means of a tropism?
A. Light
B. Wind
C. Touch
D. Gravity

Answers

C.Touch
because it’s asking for non environmental stimulus

Which of the following methods would provide the most accurate information for students collecting data about local attitudes concerning the use of alternative fuels for automobiles?

Answers

Answer:

tell us the methods dude

Explanation:

dude you need give us the methods so we can tell you

somebody somebody help me please. I'll give brainliest to anyone who gets it right​

Answers

Ans. The Adrenal Gland Recieves a message to stop releasing CRH

What does it mean to make a prediction?

Answers

Answer:

A prediction is when you believe that something is going to happen. Example: I predict that someone will answer this before me.

Predictions can either be right or wrong.

When you believe something is going to happen

the donor blood type considered to be universal

Answers

Answer:

O negative blood

Explanation:

For emergency transfusions, blood group type O negative blood is the variety of blood that has the lowest risk of causing serious reactions for most people who receive it. Because of this, it's sometimes called the universal blood donor type.

HOPE IT HELPS :)

PLEASE MARK IT THE BRAINLIEST!

Answer:

type O

Explanation:

type O, since it contains no antigens. Type O, negative, to be more speciifc (with negative referring to the Rh factor) however O Negative Is widely considered the universal blood type. It is very important because it potentially be transfused to any patient regardless of their blood type. Especially in emergency situations, when there isn't enough time to determine a patients blood type. A person with type O - is considered to be a universal donor because his blood can be safely received by a person with type A, B, AB, or O.

hope this helped!

Is kidney disease a genetic or environmental disease? Why?
Brainiest to best answer

Answers

The answer is genetic. Kidney disease is usually inherited from parents or members of your family. It’s in your genes.

Which statement about the nervous system is true?

Answers

I’m pretty sure it’s A, it works like Electrical Wires
The answer is C. It stores information. This is because The brain is part of your nervous system and of course your brain stores information that you process throughout you body in different ways. (Brainiest me please)

plz help!!!!!!!! A natural biological cooling process is sweating. Using your knowledge of endothermic and exothermic, explain why your body feels cooler when it sweats.

Answers

Answer and Explanation:

An exothermic reaction takes place when heat flows out of a system into its surroundings. ... When you sweat, the system – your body – cools down as perspiration evaporates from the skin and heat flows to the surrounding area. This means sweating is an exothermic reaction.

What are the main characteristics of amphibians?

Answers

Answer:

Amphibians are small vertebrates that need water, or a moist environment, to survive. The species in this group include frogs, toads, salamanders, and newts. ... The larvae are aquatic and free-swimming—frogs and toads at this stage are called tadpoles. At a certain size, the young develop limbs and lungs.

Explanation:

Answer:

undergo metamorphosis.,coldblooded and absorb water and undergo gas exchange

What is the point when earth is closest

Answers

Answer:

When it is perihelion and winter in the Northern Hemisphere, the Earth is the closest to the Sun.

Explanation:

Above.

Earth is closest to the sun every year in early January,

What are the colors of the rainbow?

Answers

Answer:

red, orange, yellow, green, blue, purple, and someone times violet

Explanation:

Explanation:

The seven colors of the rainbow are :red, orange, yellow, green, blue, indigo, and violet.

Hope this helps..

Have a nice day

Many species diverge from a single ancestor in the process of
A. gene flow
B. adaptive radiation
O C. radioactive dating
D. genetic isolation

Answers

Answer:

genetic isolation

Explanation:

Answer: Genetic isolation

Explanation: khan academy


A wet mount slide from a sample of Elodea leaf cells and a slide from a sample of red blood cells were initially examined using a light microscope. The remaining
portions of the two cells samples were then placed into a 20% sucrose solution. After 30 minutes, the cells were again examined using a light microscope. Which
statements best describes their appearance?
Your answer:
A. The leaf cells had undergone plasmolysis while the red blood cells had shriveled.
B. The leaf cells were swolle and turgid while the red blood cells remain unchanged.
C. Both the leaf cells and the rat blood cells had swollen and burst.

Answers

The answer is: B
Hope this helps
I think it’s B

Answer:

B

Explanation:

The leaf cells were swolle and turgid while the red blood cells remain unchanged.

Which statement describes all types of matter?

A. It is made of carbon, hydrogen, and oxygen.
B. It is composed of organic materials.
C. It takes up space and has mass.
O D. It is made of proteins and carbohydrates,

Answers

Answer:

Im pretty sure the answer is C

Answer:

C  It takes up space and has mass.

Explanation:

Everything in the world has space and mass

Which theory did Pasteur disprove by using boiled beef broth and a flask with
S-shaped tubing?

A. Cells came from preexisting cells.
B. Cells make up all living things.
C. Cells are the basic unit of life.
D. Cells came from nonliving things.

Answers

Answer:

D

Explanation:

Pasteur blocked the flask from open air to prove that cells couldn't spontaneously come into life, but rather they must come from preexisting cells.

Answer:

Cells came from nonliving things

Explanation:

Environmental damage due to increased pesticide use

Answers

Answer:

I would say A

Explanation:

Other Questions
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