Answer: Endangered species are species whose populations are dwindling in numbers and are in danger of becoming extinct. Extinct species are ones who have no documented individuals left and are therefore believed to no longer exist.
true.
are made of one or more cells.
need energy to stay alive.
respond to stimuli in their environment.
grow and reproduce.
maintain a stable internal environment.
Answer:
In igneous rocks, the texture is determined by their cooling rate.
Explanation:
Huntington's disease is due to an expansion of repeated CAG triplets (at 36 or more repeats) on the short arm of chromosome 4 in the HTT gene of huntingtin.
The prevalence in the Caucasian population is estimated at 1 / 20,000 to 1 / 10,000. This is higher compared to a disease with autosomal recessive inheritance.
It should be known that this disease affects only certain families where a heterozygote has a chance to transmit it (1/2), this is due to a mutation in their gene.
Despite its dominant character, it remains a rare disease due to its recent appearance (discovered in the 19th century) and also the rarity of the mutation.
Answer:
Explanation:
Whales and humans have alot of things in common, they are the largest groups of mammals in the world.
Whales which belong to cetaceans(group of marine mammals) can be considered human, they possess self awareness, feelings and high-level cognitive power than man.
They have large brain size which suggests that they have a complex and elaborate evolutionary history.
Humpback cerebral cortex, the part of the brain where though processes takes place are similar to that of man. Humpback whales exhibit complex social patterns that include good communication skills, collaboration and good tool usage.
Whales and human are quite social in nature.
Answer:
A whale's fin is a major homologous structure. When you examine a whale's skeleton, you'll find that all of its bones are comparable to those of other mammals. As mammals, whales share a common ancestor with other mammals, including humans. Humans and humpback whales belong to the same kingdom (Animalia), phylum (Vertebrates), and class (Mammals) which means they are related but not too close. Humpback whale embryos still have limbs, but when they become adults, they become dormant, meaning the ancestor of today's humpback whale walked on land with humans in the past and therefore may have some evolutionary relationship with us.