Are organisms in the same class in the same phylum?

Are organisms in the same class in the same phylum?

Since the system is hierarchical, organisms belonging to the same class also belong to the same phylum and kingdom. For instance, all animals belonging to the class Reptilia (reptiles, then) also belong to the phylum Chordata (animals with a notochord, or backbone) and the kingdom Animalia (animals).

What are two organisms that belong to the same phylum?

-The broadest classifications are by domain and kingdom; the most specific classification is by genus and species. Therefore; if two organisms are in the same phylum, then it means they both belong to the same kingdom, because kingdom is the rank of classification higher than phylum.

Can two organisms belong to the same genus but not the same kingdom?

for example : if two organisms are in the same ORDER, they must be in the same class, phylum & kingdom. even though the cat & the housefly have the same species group name (domestica), they CAN’T BE the same species because they are not in the same genus, family, order, etc.

Would two animals in the same family have to be in the same genus?

If two animals are the same genus, then they must also be the same family, order, class, phylum and kingdom.

What does it mean when two species have the same genus?

In biology, hybrid has two meanings. The first meaning is the result of interbreeding between two animals or plants of different taxa. Hybrids between different species within the same genus are sometimes known as interspecific hybrids or crosses.

Which organisms develop first?

Bacteria have been the very first organisms to live on Earth. They made their appearance 3 billion years ago in the waters of the first oceans. At first, there were only anaerobic heterotrophic bacteria (the primordial atmosphere was virtually oxygen-free).

What are called the remains of living organisms?

The remains of living organisms that have been trapped in the earth’s crust are fossils. Fossils can include the petrification of living tissue including, bones, shells, carbon.

What are the first photosynthetic organisms that grow well on earth?

Timeline of Photosynthesis on Earth

4.6 billion years ago	Earth forms
3.4 billion years ago	First photosynthetic bacteria appear
2.7 billion years ago	Cyanobacteria become the first oxygen producers
2.4 – 2.3 billion years ago	Earliest evidence (from rocks) that oxygen was in the atmosphere

Why do you think the emergence of plants and animals came later than simple living organisms?

Why do you think the emergence of plants and animals came later than simple living organisms? They contain more nucleus compared to lower forms of organisms.

How did the first living organism appear?

What are the origins of life on Earth? The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.

Are organisms in the same class in the same phylum?

Since the system is hierarchical, organisms belonging to the same class also belong to the same phylum and kingdom. For instance, all animals belonging to the class Reptilia (reptiles, then) also belong to the phylum Chordata (animals with a notochord, or backbone) and the kingdom Animalia (animals).

Can two organisms belong to the same genus but not the same kingdom?

for example : if two organisms are in the same ORDER, they must be in the same class, phylum & kingdom. even though the cat & the housefly have the same species group name (domestica), they CAN’T BE the same species because they are not in the same genus, family, order, etc.

What two organisms are most closely related?

Brown algae and dinoflagellates. Explanation: In a phylogenetic tree, two species are considered as most closely related if they share a more common ancestor than the others. The nodes of tree represent the common ancestor, while the tips of branches represent species originated from that ancestor.

Which group of organisms is a population?

A population is a group of organisms belonging to the same species that live in the same area and interact with one another. A community is all of the populations of different species that live in the same area and interact with one another. A community is composed of all of the biotic factors of an area.

Who believed that species are fixed forms that do not change over time?

Charles Darwin

Is migration an example of gene flow?

Gene flow, which can also be described as migration, is a common occurrence with both plants and animals. It occurs when alleles or genes are successfully transferred from one population to another population. Gene flow also occurs when bees carry pollen from one plant to another.

Which process can create new alleles?

mutation

What is disruptive natural selection?

disruptive selection: (or diversifying selection) a mode of natural selection in which extreme values for a trait are favored over intermediate values. stabilizing selection: a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular trait value.

What is disruptive selection give examples?

Disruptive Selection Examples: Color Light-colored oysters would blend into the rocks in the shallows, and the darkest would blend better into the shadows. Thus, with fewer of the medium individuals surviving to reproduce, the population eventually has more oysters colored to either extreme of the spectrum.

Why does disruptive selection occur?

Disruptive selection occurs when individuals of intermediate phenotype are less fit than those of both higher and lower phenotype, such that extremes are favored. This may occur if there are two diverse food sources or predators with diverse preferences for, say, size of prey.

Which is true of disruptive selection?

Disruptive selection, also called diversifying selection, describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups.

How does disruptive selection affect a population?

Disruptive selection is an evolutionary force that drives a population apart. The disruptive selection will cause organsisms with intermediate traits to reproduce less, and will allow those organisms with extreme traits to reproduce more. This causes the alleles for the extreme traits to increase in frequency.

What happens to the mean in disruptive selection?

Disruptive selection can lead to a bimodal distribution of trait values and therefore can result in an increase in the variance of a trait without a change in its mean.

Does directional selection change the mean?

Stabilizing selection reduces the amount of variation in a trait. For example, very small and very large babies are most likely to die, leaving a narrower distribution of birthweights. Disruptive selection increases the amount of variation in a trait.

Why is genetic drift more likely to occur in small populations?

Drift is more pronounced in such populations, because smaller populations have less variation and, therefore, a lower ability to respond favorably — that is, adapt — to changing conditions.

When nonrandom mating occurs in a population?

Nonrandom mating occurs when the probability that two individuals in a population will mate is not the same for all possible pairs of individuals. When the probability is the same, then individuals are just as likely to mate with distant relatives as with close relatives — this is random mating.

Can natural selection work on a population that has no variation?

Natural selection can only occur if there is variation among members of the same species. Variation in a population results from mutation and the recombination of alleles during meiosis and fertilization.