the following topographic map shows part if the state park. which area in the park is the steepest?
A. area A
B. area B
C. area C
D. area D

Answer:

I think, the egg. Not so sure about it.

Eggs come from chickens and chickens come from eggs: that’s the basis of this ancient riddle. But eggs – which are just female sex cells – evolved more than a billion years ago, whereas chickens have been around for just 10,000 years. So the riddle is easily solved…or is it?

Taken at face value, there is no doubt that the egg came before the chicken. We tend to think of eggs as the shelled orbs laid by birds from which their chicks hatch – unless we eat them first. But all sexually reproducing species make eggs (the specialised female sex cells). That’s 99.99 per cent of all eukaryotic life – meaning organisms that have cells with a nucleus, so all animals and plants, and everything but the simplest life forms.

We don’t know for sure when sex evolved but it could have been as much as 2 billion years ago, and certainly more than 1 billion. Even the specialised sort of eggs laid by birds, with their tough outer membrane, evolved more than 300 million years ago.

As for chickens, they came into being much later. They are domesticated animals, so evolved as the result of humans purposefully selecting the least aggressive wild birds and letting them breed. This seems to have happened in several places independently, starting around 10,000 years ago.

The wild ancestor of chickens is generally agreed to be a tropical bird still living in the forests of Southeast Asia called the red junglefowl –  with other junglefowl species possibly adding to the genetic mix. From these origins, humans have carried chickens around the world over the past two millennia or more.

So, eggs dramatically predate chickens. But to be fair to the spirit of the riddle, we should also consider whether a chicken’s egg predates a chicken. As humans consistently chose the tamest red junglefowls and bred them together, the genetic makeup of the resulting birds will have shifted. At some stage during this domestication process the red junglefowl (Gallus gallus) evolved into a new subspecies, Gallus gallus domesticus, AKA the chicken.

In practice, it is impossible to pinpoint the moment when this happened. But in theory, at some point two junglefowl bred and their offspring was genetically different enough from the species of its parents to be classified as a chicken. This chicken would have developed within a junglefowl egg and only produced the very first chicken’s egg on reaching maturity. Looked at this way, the chicken came first.

Answer:

GUI is not a valid codon...

GCG: Alanine

CCA: Proline

Answer:

5

Explanation:

The object distance Is 20 I'm

The image distance is 6.666

Therefore the focal length can be calculated as follows

1/f = 1/20 + 1/6.66

= 6.66+20/133.2

= 26.66/133.2

1/f= 26.66/133.2

f = 133.2/26.66

= 4.99

= 5

Hence the focal length is 5

Answer:

It can be a number of factors that can cause a population to grow. It can depend based on the birth rate, death rate, immigration, and emigration of the species. Additionally, it can also be how well the species adapts to it's environment.

hope that helps :-)

Answer:

Earth's shadow is bigger than the moon's.

Yeah the kids will most likely be brown the phenotypes would be Bb (heterozygous dominant)

Answer:

RNA

Explanation:

Uracil is for RAN and Thymine is for DNA

Answer:

The first one

Explanation:

(Plz give brainleist)

Answer:

Explanation:

c is wrong

Answer:

The correct anwser is D. Signals inside the spinal cord

Explanation:

hope this helps :)

Answer:

DNA replicates before a cell divides to give a complete set of genetic instructions to each daughter cell.

Explanation:

Answer:

at night, the plants uptake oxygen and release carbon dioxide, which is called respiration

Answer:

In the late 16th century several Dutch lens makers designed devices that magnified objects, but in 1609 Galileo Galilei perfected the first device known as a microscope. Dutch spectacle makers Zaccharias Janssen and Hans Lipperhey are noted as the first men to develop the concept of the compound microscope.

Answer:

B. 25%

Explanation:

There are 3 out of 4 chances the flower will be white because the white is a dominant trait, this leaves 1 out 4 chances for the flower to be purple.

Note: Drawing punnet squares can help you find the possible genotypes.

Answer:

In nature, populations are usually evolving. The grass in an open meadow, the wolves in a forest, and even the bacteria in a person's body are all natural populations. And all of these populations are likely to be evolving for at least some of their genes. Evolution is happening right here, right now!

To be clear, that doesn't mean these populations are marching towards some final state of perfection. All evolution means is that a population is changing in its genetic makeup over generations. And the changes may be subtle—for instance, in a wolf population, there might be a shift in the frequency of a gene variant for black rather than gray fur. Sometimes, this type of change is due to natural selection. Other times, it comes from migration of new organisms into the population, or from random events—the evolutionary "luck of the draw."

I hope this helps a little bit.

Answer:

Yes

Explanation:

A tissue culture is a growth of cells outside of the organism on a nutrient medium. What type of cell division, mitosis or meiosis, is involved in tissue culture? Mitosis. Give one other application of tissue culture apart from skin grafting.

more sunlight I think cause most of them don't need sunlight

Answer:

E) All of the above

Explanation:

Malaria, is caused by mosquito bites, and mosquito's follow warmth, so if climate changes to warm really quickly more people are likely to get malaria. Skin cancer can be caused by sun radiation, or staying in the sun for to long, so if climate changes again to really warm, you can get skin cancer if not careful. If your to hot you can go in hypothermia shock. And if the elevation increases or decreases to quick you can get elevation sickness. All of these options change, because of the climate around them, therefore the answer is E. I hope this helps :)

Answer:

animals

Explanation:

earthworm which is in soil

Aloe vera, Christmas cacti, neem, orchids, and other plants can be found in the lithosphere.

The solid outer layer of Earth is known as the lithosphere. The Earth's outermost layers, the crust and the brittle upper part of the mantle, are together referred to as the lithosphere.

The asthenosphere, another component of the upper mantle, and the atmosphere form its boundaries.

Lithosphere Together, the upper mantle and crust make up the outermost layer of the planet. The lithosphere is home to a variety of plants, including aloe vera, Christmas cacti, neem, orchids, and others.

The lithosphere includes a wide variety of animals. There exist microorganisms, underground organisms, animals that live on the ocean floor, as well as land animals including tigers, lizards, and moles.

Thus, these are the plants that lives in lithosphere.

For more details regarding lithosphere, visit:

https://brainly.com/question/14631600

#SPJ6

Answer:

With incomplete dominance, a cross between organisms with two different phenotypes produces offspring with a third phenotype that is a blending of the parental traits. It's like mixing paints, red + white will make pink.

Explanation:

Answer:

A fungal cell is an eukaryote with all intracellular, membrane bound organelles. A bacterial cell is basically a prokaryote with a nucleoid. The cell wall composition also varies. It is a lipopolysaccharide layer called peptidoglycan layer in bacteria whereas cell wall of a fungal cell contains complex polysaccharides called chitin and glucans. Bacteria are either autotrophic or heterotrophic whereas fungi are strictly heterotrophic. Bacteria reproduces asexually by binary fission whereas fungi can reproduce either by sexual or by asexual method. Dormant form of fungal cell are called conidiospore or basidiospore or zoospore or ascospore based on their location in hyphae and type of reproduction. In bacteria, dormant forms are called endospores.

Answer:

11 chromosomes.......

Answer:

The short answer is, yes and no. There's only a handful of animals like mammals or birds that have a parasitic relationship; one such is the Vampire Bat, yes, although one could argue it could also be considered a form of hunting too.

Explanation:

Answer:

mammals. are essentially all insects and their allies which live on the skin or in its superficial layers. The latter consist of one-celled animals or protozoa, and vari- ous types of parasitic worms, as well as certain insects and their allies.

Answer:

D. Meiosis forms four cells all with different genetic material

Explanation:

They are haploid cells and each cell only had one set of chromosomes. Meiosis results in variation.

Answer:

Phonograph

Explanation:

A phonograph, in its later forms also called a gramophone or since the 1940s called a record player, is a device for the mechanical recording and reproduction of sound

Answer:

High amounts of mitochondria are found in skeletal muscle cells, as well as liver cells. On the other hand, skin cells have a small amount of mitochondria.

Answer: B

Explanation:

Answer:

C exposure to radioactive elements

Explanation:

The main concern of using nuclear power is the radioactive elements it creates. An example would be uranium.

Sure natural gas is bad for the environment but its no where near as harmful as exposure to radioactive

Drilling for oil does not release radioactive elements therefore exposure to radioactive elements can only be caused by nuclear power.