Which system does a human have, but not a flatworm?

A. a digestive system


B. a reproductive system


C. a respiratory system with lungs


D. a nervous system

Drumb roll please...

Which System Does A Human Have, But Not A Flatworm?A. A Digestive SystemB. A Reproductive SystemC. A

Answers

Answer 1
C. I think I’m not sure
Answer 2

Answer:

i think its c but i could be wrong

No Explanation


Related Questions

march the following changes in the environment with their effect on the ocean

Answers

Answer: thermal stress 1

Reduction in pH 4

Increased runoff 3

Sedimentation 2

Explanation:

What did you find difficult about matching the choromosomes

Answers

Answer:

by blocking cells in mitosis and staining the condensed chromosomes Giemsa dye.

Explanation:

Can't explain.

What is the genotype and phenotype of the
offspring of 2 heterozygous brown eye parents
where brown is the dominant eye color and hazel
is the recessive eye color?

Answers

Answer:

Genotypes:

BB, Bb, bb

Phenotypes:

Brown eyes, hazel eyes

Explanation:

Punnet squares are in the image attached

what are the reason for which people deposit money in a bank ?​

Answers

so when they get robbed all their money doesn’t get stolen and it’s safe

Describe how home heating and cooling has changed over time, and how it has remained the same.

Answers

Heating is still done largely by burning fuels, like it has been in the past, although people now have central heating to circulate the warm air throughout the house. Some people use electric heaters and people used to use cool water to cool their houses. Now people use electric air conditioners.

Why is it important that a protein keeps its shape?
The shape of a protein keeps its amino acids from changing sequence.
The shape of a protein keeps it from breaking up into loose amino acids.
The shape of a protein allows it to perform several different jobs.
The shape of a protein allows it to perform its particular job

Answers

C. The shape of a protein allows it to perform several different jobs.

Match
Solids
Liquids
Gases
Change of state of Matter
Particles are
tightly packed, but are
far enough apart to
slide over one
1 another
Occurs due to heating or
cooling of a substance (adding or
* removing energy)
have an
indefinite shape
and an indefinite
volume
Particles
tightly packed, vibrating
about a fixed position

Answers

Answer:

Particles are  tightly packed, but are  far enough apart to  slide over one  1 another- Liquid

Occurs due to heating or  cooling of a substance (adding or  * removing energy)- Change of State of Matter

have an  indefinite shape  and an indefinite  volume- Gas

Particles  tightly packed, vibrating  about a fixed position- Solid

Explanation:

A scientific theory is an explanation supported by scientific evidence.

Answers

Answer:

Is this a true or false question?

Explanation:

Which phylum contains more than 10,000 living species?

Porifera
Echinodermata
Cnidaria

Answers

Answer:

Cnidaria

Explanation:

A person who is interested in the hypothalamus and its functions might pursue a career in

neuroscience
gene therapy
endocrinology
sports medicine
Answer correctly Please this is my first time hehe

Answers

the answer is neuroscience
The answer is neuroscience

how does the digestive and nervous system interact

Answers

The digestive system stores and digests foods, transfers nutrients to the body, eliminates waste and absorbs water.

Match the following terms describing electrical events with the correct phases of the cardiac cycle.
Question Selected Match
The ventricular muscle cells depolarize at the start of this phase.
During this phase, Na+ entry through the funny channels causes the pacemaker potential of SA nodal cells to gradually become less negative until it reaches threshold.
The ventricular muscle cells repolarize right before this phase.
The cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase.
All Answer Choices
A. isovolumetric contraction
B. ventricular ejection
C. ventricular filling
D. isovolumetric relaxation

Answers

Answer:

1. Isovolumetric contraction.

2. Ventricular filling.

3. Isovolumetric relaxation.

4. Ventricular ejection.

Explanation:

In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Generally, the cardiac cycle occurs in two (2) stages;

Diastole : in this stage, the ventricles is relaxed and would be filled with blood.

Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.

The following terms describe the electrical events with the correct phases of the cardiac cycle in mammals (human beings);

1. Isovolumetric contraction: The ventricular muscle cells depolarize at the start of this phase. During this phase, the pressure in the atria is lower than the pressure in the ventricles while the pressure in the arteries is higher than the pressure in the ventricles.

2. Ventricular filling: During this phase, Na+ entry through the funny channels causes the pacemaker potential of SA nodal cells to gradually become less negative until it reaches threshold. It causes the atria to contract at the end of the phase.

3. Isovolumetric relaxation: The ventricular muscle cells repolarize right before this phase. During this phase, all of the four (4) cardiac valves are closed while all of the four (4) chambers are relaxed.

4. Ventricular ejection: The cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. Also, the atrioventricular (AV) valves are closed while the semilunar valves are open.

Which of the following substances is a strong acid? A. Sea Water. B. Pure water. C. Ammonia D. Battery acid

Answers

I think it is C but im not sure, it could be D too

is this true or false?: Males are more likely than
females to express a x-linked recessive disorder

Answers

True

Sorry if im wrong

have a nice day.

The breaking down of glucose into two molecules; anaerobic process. Please help

Answers

i’m pretty sure it’s glycosis

Answer:

glucose is broken down in ten steps to two molecules of pyruvate which then enters the mitochondria where it is oxidized through the tricaboxylic acid cycle to carbon dioxide and water

Which trait is not inherited?

A. The long length of a person's fingers
B. The large size of a person's ears
C. The freckles on a person's cheeks
D. The ability to speak Spanish

Answers

Answer: D. The ability to speak Spanish.

Explanation:

No one is born already speaking. Speaking a language is a learned behavior.

Answer: d ability to speak Spanish

Explanation: I help ;)

Which would conserve more energy, if all humans ate only vegetables or ate only meat?

Answers

I think it's b because it seems obvious

meat i’m pretty sure

Which one of the following is made of angular gravel clasts?
a. conglomerate
b. sandstone
c. breccia
d. mudstone

Answers

Answer:

c) Breccia

HOPE IT HELPS!!

Most fossilized bones have undergone the process of

A)unaltered preservation
B)carbonization
C)casting
D)perimineralization

Answers

Answer:

D. Perimineralization

Explanation:

After a bone, wood fragment, or shell is buried in sediment, it may be exposed to mineral-rich water that moves through the sediment. This water will deposit minerals, typically silica, into empty spaces, producing a fossil.

The answer is perimineralization don’t ask me why tho I just know cuz I learned tho like a year ago

The tortoise took 5 minutes to go 30 feet; how slow is the turtle?

Answers

Answer:

6 feet/minutes

Explanation:

The tortoise took 5 minutes to go 30 feet; how slow is the turtle?

= 30/5

= 6 feet/minutes

1. What is the purpose of transcription? Why does it have to occur?

Answers

Answer:

The goal of transcription is to make a RNA copy of a gene's DNA sequence. For a protein-coding gene, the RNA copy, or transcript, carries the information needed to build a polypeptide (protein or protein subunit). Eukaryotic transcripts need to go through some processing steps before translation into proteins.

Explanation:


The difference between an open and a closed circulatory system is...

Answers

Answer:

In the closed circulatory system, blood is confined to a heart and blood vessels, whereas in an open system, hemolymph (blood) moves from a heart through vessels into interconnected spaces called a "hemocoel."

Explanation:

An open circulation the blood is not blood vessels, it instead is pumped into a cavity called Hemocoel.

A closed circulatory system, the blood is pumped through vessels SEPARATE from the interstitial fluid of the body.

Temperature is determined by which of the following?
A.) Particles move faster
B.) Particles move slower
C.)Particles cease to move
D.)Particles move at a constant rate

Answers

The answer is D because they could move slower or faster it depends on if the temperature is high or low
D. Particles move at a constant rate

I need help with this question

Answers

Answer:

a and c

Explanation:

I do not really have an explanation but I hope this helps :)

Answer:

a and c

Explanation:

brain has to do with your nervous system and your heart has to do with your circulatory

What are two kinds of chemical properties of matter?

Ability to shine
Ability to burn
Ability to bend
Ability to rust

Answers

Explanation:

Summary. Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust.

Answer: Ability to burn and ability to rust

Explanation:

Which enzyme is responsible for adding free nucleotides to the new DNA strand during replication?

A. DNA polymerase

B. Helicase

C. RNA polymerase

Answers

A. DNA polymerase.they add nucleotides one by one to the growing DNA chain, incorporating only those that are complementary to the template.

Plz answer asap - As the universe "Expanded" what happened to the Local Groups of Galaxies? ​

Answers

Answer:

they ex-0 off

Explanation:

Answer:

I heard it exploded

Explanation:

what is most likely to happen when water loses heat

Answers

Answer:

it will turn to ice

Explanation:

the potential energy in the molecules is reduced and they start to move alot slower, eventually they stick together and form ice

Q 13.34: Water needs in space flights are easily met through recycling waste water.
А
True
B
False

Answers

Answer:

true

Explanation:

because they reuse that water like they filter it

how long does it take for mitosis to complete? why will most of the cells you view be in interphase?

Answers

Answer:

Mitosis takes about 2 hours to complete :3

Most cells would be viewed in interphase because it's the most important part of the stage where G1, S, and G2 phase are there too :3

Explanation:

:3

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