Primary source of energy

Used for movement cell defense, cell structure, communication, and cell regulation

Composes the outside of the cell membrane

Carries hereditary information

Pair each structure with its function:
*Nucleic acid
*Protein
*Lipid
*Carbohydrate
*Water
​

Answer:

Despite differences in structure and function, all living cells in multicellular organisms have a surrounding cell membrane. Just as the outer layer of your skin separates your body from its environment, the cell membrane (also known as the plasma membrane) separates the inner contents of a cell from its exterior environment. This cell membrane provides a protective barrier around the cell and regulates which materials can pass in or out.

Structure and Composition of the Cell Membrane

The cell membrane is an extremely pliable structure composed primarily of two layers of phospholipids (a “bilayer”). Cholesterol and various proteins are also embedded within the membrane giving the membrane a variety of functions described below.

A single phospholipid molecule has a phosphate group on one end, called the “head,” and two side-by-side chains of fatty acids that make up the lipid “tails” (Figure 3.1.1). The lipid tails of one layer face the lipid tails of the other layer, meeting at the interface of the two layers. The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior (Figure 3.1.1).

This diagram shows the structure of a phospholipid. The hydrophilic head group is shown as a pink sphere and the two tails are shown as yellow rectangles. This diagram shows a phospholipid bilayer. Two sets of phospholipids are arranged such that the hydrophobic tails are facing each other and the hydrophilic heads are facing the extracellular environment.

Figure 3.1.1 – Phospholipid Structure and Bilayer: A phospholipid molecule consists of a polar phosphate “head,” which is hydrophilic and a non-polar lipid “tail,” which is hydrophobic. Unsaturated fatty acids result in kinks in the hydrophobic tails. The phospholipid bilayer consists of two adjacent sheets of phospholipids, arranged tail to tail. The hydrophobic tails associate with one another, forming the interior of the membrane. The polar heads contact the fluid inside and outside of the cell.

The phosphate group is negatively charged, making the head polar and hydrophilic—or “water loving.” A hydrophilic molecule (or region of a molecule) is one that is attracted to water. The phosphate heads are thus attracted to the water molecules of both the extracellular and intracellular environments. The lipid tails, on the other hand, are uncharged, or nonpolar, and are hydrophobic—or “water fearing.” A hydrophobic molecule (or region of a molecule) repels and is repelled by water. Phospholipids are thus amphipathic molecules. An amphipathic molecule is one that contains both a hydrophilic and a hydrophobic region. In fact, soap works to remove oil and grease stains because it has amphipathic properties. The hydrophilic portion can dissolve in the wash water while the hydrophobic portion can trap grease in stains that then can be washed away. A similar process occurs in your digestive system when bile salts (made from cholesterol, phospholipids and salt) help to break up ingested lipids.

What is phagocytosis?
A. the process of red blood cells breaking down pathogens
B. the process of white blood cells breaking down pathogens
C. the self-death of pathogens
D. the shrinking of pathogens

Which activity demonstrates chemical weathering?

What is the difference between chemical and organic evolution

Help please I’ll mark you as brainliest !

Match each stem or root to its description.
Plz help meeee
WILL MARK BRANLYIEST ​

Look at the cladogram on screen 2. How do pelvic bones of modern day wales compare to the pelvic bones of our ancestors

suggest why a baby born without any mitochondria will have difficulties growing

Which of the following is NOT a function of lipids in living things?
A long-term energy storage
B heat insulation
C makeup & production of steroid hormones
D speed up or start chemical reactions​

how the body's white blood cells respond to infections.

The sodium-potassium pump within living cells requires energy to move ions across the cell membrane to maintain homeostasis. How is this energy supplied?

When rocks and soil are broken down into smaller pieces, this is called ______.

8. From capillaries, blood flows into _________________, blood vessels that carry blood back to the heart.

During cellular respiration, which of the following is equal to the total number of oxygen atoms in glucose and oxygen Gas?

What is another term for migration?

Write a 2 paragraph summary about the structure of DNA from the information on the first page.
FYI the picture is attached

PLSS HELP
Are they true or false? Think of evidence from the video to justify your
answers.
True
False
Scientific discoveries are
made by scientists working
alone
Scientists quickly accepted
the idea that an asteroid
caused a mass extinction.
The effects of the asteroid
strike were felt around the
world.
This question requires one response per row

help . ill mark u as Brain list​

Is water on earth increasing due to global warming?

PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!PLSSSSSSS HELPPPPPPP I WILL GIVE BRAINLIESTTTTTTTTTT!!!!!!!!!!!!!!!!!!

COMPARE AND CONTRAST ACTIVE IMMUNITY AND PASSIVE IMMUNITY

Trace fossils are not actual pieces, molds or impressions of organisms.
O True
O False

Please list several (at least three) things that could be changed in schools to fit your
answer from question two.

DESCRIBE AGE STRUCTURE AND SEX RATIOS.

5. Balanced forces cause a change in the motion of plate tectonics. True O False​

Which statement describes a connection between photosynthesis and cellular respiration?

Question 6 options:

Water is a product of photosynthesis and is a reactant for cellular respiration


Oxygen is a product of both photosynthesis and cellular respiration


Oxygen is a product of photosynthesis and is a reactant for cellular respiration


Water is a product of both photosynthesis and cellular respiration

Plz help !! I don’t know the answer to this

Characteristic in your own words.

Which type of lava is most likely to cause the most widespread damage?

Rhylotic, Andestic, or Basaltic?

Which type of asexual reproduction allows an organism to grow from an older organism? *
Which type of asexual reproduction allows an organism to grow a stem or root? *

PLEASE HELP WILL NAME BRAINLIEST - Jessica uses an aquarium to model convection currents in the ocean. She places a heating
element on the left side of the aquarium. She tapes an ice pack to the right side of the
aquarium. If Jessica adds red food coloring to observe water flow in the aquarium, what
will she see?

Blological evolution is the process by which populations of organisms change over time. How could natural selection lead to evolution?