# Which of these best orders the rock layers from the youngest to the oldest? (1 point)1) Layer A - Layer B – Layer C – Layer DO2) Layer A - Layer D - Layer B - Layer CO 3) Layer D - Layer C - Layer B - Layer A4) Layer D - Layer A - Layer C - Layer B

D-C-B-A

Explanation:

Oldest crust on the bottom

Answer: 3) layer D, layer C, layer B, layer A

## Related Questions

What is the density of an object with a mass of 40g and a volume of 5mL

m =  V × ρ

=  5 cubic meter × 40 kilogram/cubic meter

=  200 kilogram

Explanation:

In the 1950s, when Watson and Crick were working on their model of DNA, which concepts were well accepted by the scientific community?

Wilkins and FranklinName: Maurice Wilkins and Rosalind Franklin
Date: 1951
Description:
- Wilkins was working with a technique called X-ray diffraction: a technique that involved aiming X rays at the DNA molecule
- Franklin took the now famous Photo 51 and collected data eventually used by Watson and Crick
- Photo 51 indicated that DNA was a double helix, or twisted ladder shape, formed by two strands of nucleotides twisted around each other
- The specific structure of the DNA double helix was determined later by Watson and Crick when they used Franklin's data and other mathematical data

In the 1950s, several key concepts related to DNA were well understood in the scientific community, such as the polymer structure of DNA, base pairing rules, and the helical structure of the molecule itself. The established methods like X-ray crystallography also contributed to their research.

### Explanation:

In the 1950s, when Francis Crick and James Watson were working on their model of DNA, the scientific community had a well-established understanding of several key concepts. For example, it was well accepted that DNA is a polymer of nucleotides, each containing deoxyribose sugar, phosphate group, and one of four nitrogenous bases, A, T, C, and G; and that purines always pair with pyrimidines.

X-ray crystallography was an accepted method for investigating molecular structure. Chargaff's rules, which state that of the four types of nucleotides present in a DNA molecule, two were always present in equal amounts, were also widely accepted. Finally, it was known that the DNA molecule has a helical structure, thanks to the work of Rosalind Franklin.

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what process occurs when a single flower self-pollinates by a male cell and female cell coming together to form a seed?

it is
sexual reproduction
it becomes more and more reproduction and that when the male cell matches up with the female cell and then it becomes another egg

What are physical characteristics that help an organism survive

Special characteristics adapted by specific animals allow them to carry out unique abilities in order to survive. For instance, a cheetah's long tail helps it balance when running at rapid speed in order to hunt. Or an arctic woolly bear caterpillar is able to be frozen and fill it's body with an antifreeze hormone that allows it to survive temperatures below freezing.

_______ behavior is inherited and programmed in the genetic code.When a deer hears a sound in the forest, such as crackling footsteps, it immediately freezes and then bolts through the bushes. This is an example of the _______ response.
Mating rituals or displays can be very complex but are also _______ behaviors.
When animals fight and one wins and one submits, this allows for the establishment of a _______. This means that one animal (the winner) likely gets to reproduce and lead the group.
_______ behavior is used to intimidate other animals in social interactions. Examples include baring teeth or growling.
_______ behaviors rely on prior practice or experience.
When a dog is sleeping and does not react to the sound of a person walking around the house, that is most likely an example of ________.
A common type of learning that involves experimenting to get a reward is called _______.
_______ is the pattern of behavior that follows the day/night cycle.
Many bird species have seasonal behaviors that cause them to _______ or change their location.
Explain how territorial behavior helps an animal population survive.

Innate

fight or flight

innate

hierarchy

Aggressive

Learned

habituation

trial and error

migrate

When animals mark their territory they ensure that the mates and food in their area are not overwhelmed. Though territorial animals often fight, it is not to the death, and more to establish social order. This prevents them from over-eating their environment and helps the entire species stay in balance to survive.

Explanation:

PF

Innate

fight or flight

innate

hierarchy

Aggressive

Learned

habituation

trial and error

migrate

When animals mark their territory they ensure that the mates and food in their area are not overwhelmed. Though territorial animals often fight, it is not to the death, and more to establish social order. This prevents them from over-eating their environment and helps the entire species stay in balance to survive.

Explanation:

PENN

Tall plants are dominant to short plants what are the possible genotypes for a tall plant