Answer:
Like cells and tissues, organs seldom work alone. They "cooperate" with one another and form specific organ systems. Organ systems are the fourth level of organization in living things. An organ system is a group of organs working together to perform a specific function for the organism.
What happens to the brain after it is attacked with prions from a mad cow?
a.) swollen
b.) holey
c.) it shrinks
d.) it contains extra grey matte
Answer:
im not entirely sure, but I think it's b.
Explanation:
Joey looked at this picture and said "It must be raining outside." His statement is a(n)
A.inference.
B.quantitative observation.
C.prediction.
D.qualitative observation.
20 POINTS
Writing Prompt (you will also see this within the assignment):
There are three challenges of life that all living things must overcome in order to survive.
Obtain energy.
Reproduce offspring.
Maintain homeostasis.
Choose two DIFFERENT organisms and describe how they EACH meet these challenges to survive. You can choose any organism: plant, mammal, reptile, insect, human, etc.
WARNING- NO PLAGARISM WRITE THIS IN UR OWN WORDS 20 POINTS WHEN U ANSWER IF IT GETS BE A B + OR ABOVE ILL GIVE U BRAINLIEST BTW MAKE SURE IT'S ATLEAST 1 PARAGRAPH
A swim team thinks that the swimsuits and swim caps they use may affect the team's performance. The swim team decides to test if the swimsuits make a difference on how fast they can swim. They split the team in two groups. The two groups wear different kinds of swimsuits and different kinds of swim caps.
Why is their test invalid?
A.The swim team didn't have enough members.
B.They should have changed one variable, keeping the other the same.
C.They all swam different speeds on purpose.
D.Actually, the test is valid.
Answer:
A
Explanation:
They need a control group
which reproduces slowest: bacteria, viruses, fungi, or protists? and why?
Answer: Bacteria
Explanation: Bacteria- mostly is a free-living organisms and viruses can never reproduce on its own, but a bacterial cell can
Read the following statement: "It is thought that the dinosaurs were killed
off by a meteor strike." Since this statement explains how & why dinosaurs became extinct, it is considered a scientific _____.
A,observation
B. fact
C.theory
D.law
Answer:
A
Explanation:
Plant and animal cells are surrounded by a cell membrane, but only plant cells have a rigid ______.
Answer:
have a rigid Cell wall
any help would be very much appreciated!
A student wants to find out if the amount of bleach has an effect on stain removal.
He plans to use two white shirts, stain each of them with mustard, and then wash each of them using bleach. He can change the size of the stain on the shirt and the amount of bleach he adds to the water.
Which test should the student set up?
Answer:
The second option.
Explanation:
We're trying to test the amount of bleach that has an effect on the stain so that is the altered variable.
The 2nd option uses different amounts of bleach to clean the same amount of stain.
If you choose the other options, people can argue that the bigger stain would be harder to clean with one cup of bleach, whereas the small stain gets two cups or the other way around.
It's not an effective way to see if the amount of bleach has an effect on stain removal.
A student is interested in the behavior of fish. He has 4 fish bowls and 20 goldfish. He puts the same number of fish in every bowl and puts them under light. He changes the temperature of each fish bowl, and he observes the behavior of the fish. What can the student find out from doing just this experiment?
A.If the temperature of the fish bowl and the amount of light affect the behavior of the fish.
B.If the temperature of the fish bowl affects the behavior of the fish.
C.If the number of fish, the temperature, and the amount of light affect the behavior of
D.If the number of fish in the fish bowl affects the behavior of the fish.
Answer:
B
Explanation:
The student is changing the temperature of each bowl. He has the same number of fish in each bowl so he will not be able to see if the number of fish in each bowl affects their behaviour. The light is above every bowl so he will not be able to assess if that changes their behaviour either