Which of the following are the first organisms to have a one-way digestive system?
A. roundworms
B.flatworms
C.jellyfish
D.sponges

Answers

Answer 1

Answer:

A. round worms

Explanation:

they were the first organisms to have a one-way digestive system

Answer 2

Answer:

the roundworms i believe

Explanation:

hope i helped in some way


Related Questions

If a short haired SS guinea pig is crossed with a long haired ss guinea pig what percentage of their offspring will have short hair?

Answers

Answer:

100%

Explanation:

100% of the offspring will have short hair

EXPERT HELP i'LL GIVE BRAINLIEST: Which TWO phrases best describe vascular tissue in plants?

B. Contain cells that connect to form pipes

D. Transport water and food

A . Contain root hair cells and guard cells

C. Cover the outside of plants

Answers

Answer:

B ) Contain cells that connect to form pipes.

D ) Transport water and food.

Explanation:

Vascular tissue is a conducting tissue, meaning multiple cell types can be found. Their functions are to transport fluids and nutrients. To do this, they need cells that connect to form tube like pipes.

Identify two organisms that have different niches in the same habitat and tell what those niches are. help plz

Answers

Answer:Deer and rabbits

Explanation:

Deer browse higher on trees and rabbits graze on grass. Since they don’t compete for food, everything is in balance

deer and rabbits, no need for an explanation

i need help with this please and thank you.

Answers

B the temperature increases
The answer is B. But give the other guy brainliest

No plagiarism pls!!!!!!!!
Explain homeostasis and why it’s important to the body

Answers

Homeostasis is how an organism or cell maintains a stable internal environment despite external conditions. It’s important to the body because without it, organism’s wouldn’t be able to regulate bodily systems and as a result, wouldn’t survive.

Answer:

Homeostasis regulates your body. When you are too hot, your body produces sweat to cool you down. When you're cold, you muscles shiver to generate warmth. When you have high glucose levels in your blood, your pancreas excretes insulin, and when blood glucose is too low, then it excretes glycogen. Homeostasis basically keeps your body from losing control and it helps you survive.

Why are young plants like but not identical to their parents?

Answers

Answer:

Dna

Explanation:

because the plants adapt to the dna of the other plants I think

Sea stars can move slowly with the aid of
A.muscular foot.
B.jointed legs.
C.radial arms.
D.tube feet.

Answers

A muscular foot, I’m pretty sure

Answer:

Tube feet

Explanation:

This tube feet help the sea stars balance in water

PLEASE HELP I NEED THIS DONE TODAY. THE QUESTION IS UNDERLINED . FILL IN THE THINK SECTION ONLY

Answers

How fast/the speed
How fast/ or slow the object decreases
And the changes in direction
The acceleration of an object depends on the mass of the object and the amount of the force applied to it. It states that the acceleration of an object increases with increased force and decreases with increased mass

Temperature can affect density in certain ways. If the temperature decreases, what effect can that have on the density of a substance?

Answers

Answer: c

Liquid water at 25 deg is so rapidly breaking bonds between H2O units and reforming them that extra water molecules get trapped inside the water lattice. This is the reason why liquid water is more dense than solid water.

The bonds in water break more slowly as temperature decreases and the structure tend to trap fewer extra water molecules. At low temperature, more of the water has the same lattice as ice.  

Wikipedia, Water Density

It is possible to have liquid water at temperatures well below 0 deg C. Molecules in this supercooled water are free to move. Bonds are made and broken. The long range structure is not perfect but the short range structure of supercooled water is very much like ice. Adding a crystal to supercooled water causes instantaneous ice formation.

Explanation: :P

What would the function of Mitosis and meiosis be in a mosquito?

Answers

Answer:

Like any other cells the cells of the mosquito also undergoes the cell cycle. When it is in the resting Interphase growth occurs in the cells and replication of chromosomes occur. Then in prophase the nuclear membrane is lost and the chromosomes become thickened and coiled.

Explanation:

Answer:

Like any other cells the cells of the mosquito also undergoes the cell cycle. When it is in the resting Interphase growth occurs in the cells and replication of chromosomes occur. Then in prophase the nuclear membrane is lost and the chromosomes become thickened and coiled.

Among the gas giants, which planet has the lowest number of known natural satellites orbiting it?

Answers

Answer:

neptune

Explanation:

it has the least

Among the gas giants, Neptune has the lowest number of known natural satellites orbiting around it. Neptune has 14 satellites which revolve around it.

What are gas giants?

A gas giant is a giant planet which is composed mainly of hydrogen and helium gases. Gas giants are also known as failed stars because they contain the same basic elements which are present in the stars. Jupiter and Saturn are the gas giants of the Solar System. The gas giants can also be called as giant planets.

The four gas giants in the solar system are Neptune, Uranus, Saturn, and Jupiter. These are also known as the Jovian planets, it refers to the Roman god Jupiter and was intended to indicate that all of these planets were similar to Jupiter god. Among these gas giants. Neptune contains the least number of satellites i.e., 14 orbiting around it.

Learn more about Neptune here:

https://brainly.com/question/811328

#SPJ5

Phoenician gold and silver jewelry was_________________.
A) well-crafted
B) delicate
C) based on Egyptian designs
D) all of the above

Answers

Answer:

all of the above i believe..

Explanation:

Answer

its d

Explanation:

Help need help please!!

Answers

Answer:

A

Explanation:

Its a because coral reefs protect coastlines

Answer:

A

It is the geosphere and biosphere, trust me.

PLZ HELP ME ASAP

What is the relationship between reproduction and death rate?

Put in ANY answer that answers the given question, thx.

BTW ILY AND UR THE BEST <3

Answers

If death rate exceeds birth rate, the population declines. And if birth rate and death rate are in equilibrium, growth rate is zero and the population remains stable. In a stable population, each individual (on the average) produces one offspring which survives long enough to reproduce itself.

Answer:

Explanation:

The relationship between betwen reproduction and death rate  is the difference between birth and death rates. It measures the degree to which a population is growing.

Mira is testing objects for her science experiment. She has a chart listing the mystery objects' densities, but no other information.

Object Density
A 12 g/cm³
B 9 g/cm³
C 3 g/cm³
D 6 g/cm³

She places each object in a large bowl of water in order to determine if any float. Which of the objects, if any, will float?
A. A
B. C
C. All objects will float
D. No objects will float

Answers

The answer is B. That’s because C is the less dense

why is the prevention of epidemics usually easier than the prevention of pandemics

Answers

Answer:

Most epidemics are like protest, but pandemics are fast spreading diseases that are hard to stop

Explanation:

plz pick me brainliest

Fossils of the Dorudon, an aquatic mammal that lived over 40 million years ago, show a whale-like animal that had small, underdeveloped hind limbs. Which best explains how fossils like the Dorudon support the theory that plant and animal life has evolved over time?

Answers

Answer:

they prove that animals evloved from a sinle anncestor

i will give u a braily if u answer corecctly

Answers

I think C. It helps break down foods into nutrients.
Yes I think it’s C!!!!!

Which are examples of environmental changes that can influence natural selection? Select the THREE (3) that apply.

predators


availability of water


temperature

height of legs


fur

natural disaster


color of body


size of body


size of beak

Answers

1. availability to water
2. Temperature
3.Natural Disaster

The three examples of environmental changes that can influence natural selection are:

Availability of waterTemperatureNatural Disaster

What is Natural Selection?

Natural selection is a set of characters that deal with the most favorable variations that are promoted by nature.

As predators, the height of legs, fur, the color of the body, size of the body, and size of the beak is not related with environmental changes. It can also be said that these characteristics lead to natural selection depending on the conditions, such characteristics are not linked with environmental changes directly.

Therefore, the three examples of environmental changes that can influence natural selection are the availability of water, temperature, and natural disasters.

To learn more natural selection, refer to the link:

https://brainly.com/question/23929271

A junction where one neuron can transfer an impulse to another structure is called:
a.
axon.
b.
dendron.
c.
cell body.
d.
synapse.


Please select the best answer from the choices provided

A
B
C
D

Answers

Answer:

d. synapse

Explanation:

Synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector). A synaptic connection between a neuron and a muscle cell is called a neuromuscular junction.

d. synapse (the site of transmission of electric nerve impulses between two nerve cells)

I need help on this row thanks !

Answers

For 3 the value of x is 106

For 6 the value of x is 20

For 9 the value of x is 44

Answer:

1.) x = 106

2.) x = 20

3.) x = 44

Explanation:

1.) 174 - 68 = 106

2.) 6x = 120

x = 20

3.) 3x + 30 = 162

3x = 132

x = 44

What is an example of how anatomical homologies (similar bone structure) are used to
show evidence of common ancestry among groups of organisms?

Answers

Yes the evidence of common ancestry
Ig use something about common

No plagiarism!!!!!!!
Explain the cell theory

Answers

Answer:

Explanation:

The cell theory basically just tells you that all living things have more than one cell and that cells are made from other cells. It basically just tells you that cells are our foundation for life, without cells we can't live.

For, example, blood cells. If we didn't have blood cells our body's organs can't get the oxygen and nutrients they need to survive. Without blood cells we could get weak or we could just die instantly.

Hope this helps!!!

In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.




The basic tenets of cell theory are that all living things are made up of cells and that cells are the basic units of life. However, cell theory dives deeper than that. ... In other words, everything is made up of cells. Cells are the basic building blocks of organisms and of life.

Help needed!! Please

Answers

A for sure is the answer
A I think is the answer as I haven’t heard of them
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