Trilobites are extinct marine invertebrates. Scientists found a trilobite fossil in
layer 5, shown here. Fossils in which layer are likely to be slightly older than
this trilobite fossil?
A. 13
B. 7
C. 4
D. 6

Fossils in the 4 layer are likely to be slightly older than this trilobite fossil because this layer is present below that 5 layer.

Fossils are the preserved remains parts or traces of remains of ancient organisms that were extinct long time ago. Fossils are the rocks that can preserve on entire organism such as bones, shells and feathers etc.

So we can conclude that fossils in the 4 layer are likely to be slightly older than this trilobite fossil because this layer is present below that 5 layer.

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A scientist is extracting the DNA of a multicellular organism. He finds that 20% of the strands bases are Thymine. Based on Chargaff's rule, what percentage of the
strands bases would be Adenine?

A. 20%
B. 70%
C. 40%
D. 60%

Gravity causes a ball to fall is which law

What is the highest possible elevation shown on the map?

Function of trichocyst

Someone please tell me the closest planet and the farthest in order 1-8

HELP PLEASEE
What is the difference in climates east and west of the Cascade Mountains in the Pacific Northwest?
There is more cloud cover and more rain in the east of the Cascade Mountains,
O There are colder winters in the west but milder winters in the east of the Cascade Mountains,
O There is more sunshine and less rain in the west of the Cascade Mountains
There are milder winters in the west but colder winters in the east of the Cascade Mountains,

Where do ETC reactions take place

Help me please....pleaseeeeee

What does DNA replication ensure?

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Quick question please help (: 40 points

Suppose a scientist found a new fossil that indicated it was a primitive mammal. Relative dating techniques place the age of this fossil at a much earlier time than mammals were thought to exist. What effect will this finding have on understanding of the history of life?
A.
The split between mammals and nonmammals in the tree of life needs to be shifted back.

B.
A new branch needs to be added to the tree of life.

C.
An existing branch on the tree of life needs to be removed.

D. Other fossils need to be retested to be sure that the ages assigned to them are not in error.

Which of the following types of fats are most associated with heat disease? (They tend to be solid at room temperature)

A. Monounsaturated
B. Polyunsaturated
C. Phospholipids
D. Saturated fats

B. What is the largest cell called?
This is the largest cell in the human body. In
contrast, the sperm cell is the smallest cell in
the human body.
HELP ASAP!!!

Calculate the volume in mL of a stock solution of 100% ethanol, required to prepare 2 L of a 70% solution of ethanol in dH2O

The differences between two molecules include the type of sugar that forms a section
of the molecules and the identity of one of the four nitrogenous bases that make up
another section of the molecules. These two molecules are -
A proteins
B lipids
C nucleic acids
D complex carbohydrates

What macromolecules provide instruction for growth

A cell’s nucleus will divide during mitosis. Whaat process must happened before it can divide?

1. How much force accelerate a bicycle and rider with mass 60 kg at 1.5 m/s?

which of the following cell is also called rechargeable battery. . primary cell., secondary cell,. dry cell., none of these​.

What's the term that describes all the chemical reactions taking place in an orgasm

Please help 16 points

What dose the numbers on the map mean

Cells use a molecule called
Choose...
to store and release energy like a battery. The energy is stored in chemical bonds between
Choose...
groups of the molecule, and the energy is released when the chemical bonds are broken.

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At what point should health officials have started to control the spread of Ebola in West Africa? It needs to be an essay.

From the giraffe story, give an example of the following:
1. Variation
2. Adaptation
3. A factor affecting the size of a population

4. Food molecules diffuse through the wall of the intestines directly into the blood. Which two systems directly interact during this process? A respiratory and circulatory C immune and digestive B circulatory and muscular D digestive and circulatory

Which is the process by which green plants use sunlight, water, and carbon dioxide to make food?

o photosynthesis
o cellular respiration
o anaerobic respiration
o fermentation

The structure labeled "A" open and close the sites where the gases, carbon dioxide and oxygen, are exchanged during photosynthesis. What is the structure labeled A?

does any one know whats wrong with my foot it has been in constant pain since yesterday now i dont know if it is a sprain or what plz help im in constant pain now i can hardly walk it is the long near the big toe right in the center of the long bone conecting to my ankle plz i need to know if i need to go to doctor.

Erythrocytes (red blood cells)have no nucleus, mitochondria, orother organelles at maturity. Theseorganelles are ejected when the RBCenters the bloodstream, or shortlythereafter. Should this still beconsidered a cell? What will be theeffect of having no nucleus? In thesecells, the lack of mitochondria is anadvantage. Why?