Can humans be split into races? - Ask A Biologist
Feb 14, 2018 · Humans haven't been around as long as other animals. We haven't had enough time to develop much variation in our DNA. Humans also migrate and reproduce a lot. Different groups of humans are never apart long enough for genetic differences to add up. Human DNA is too similar to split us into subspecies, or into “races.”
Can humans be split into races? | Ask A Biologist
Humans haven't been around as long as other animals. We haven't had enough time to develop much variation in our DNA. Humans also migrate and reproduce a lot. Different groups of humans are never apart long enough for genetic differences to add up. Human DNA is too similar to split us into subspecies, or into “races.”
Insect and Human Similarities | Ask A Biologist
Jan 12, 2016 · While humans have lungs, insects breathe through air-filled tubes called tracheae that are found in different places on the body. To deliver oxygen, humans use proteins in the blood. In insects, the tubes that allow oxygen into the body actually continue to get smaller and smaller, and pass alongside most cells in the body.
Top Questions - Ask A Biologist
4. 5. Next. Have you ever wondered what questions we have received and answered over the years? You are not alone. Others have wondered the same thing. We have sorted through our collection of queries and are listing a few of our top questions and answers.
Genetic Diversity of Dogs - Ask A Biologist
Aug 19, 2011 · Short segments of genes from a distant dog relative, the gray wolf, were found in every sample of the dogs’ genetic information. However, the nucleotides that make dogs look different were only found in a few areas of the DNA. These reflect the areas that have changed in the centuries since people started breeding dogs for different traits ...
Top Biology Questions | Ask A Biologist
Do different "races" exist? Do I only use 10% of my brain? Does brain size relate to intelligence? Does everyone need to be vaccinated? How are humans different from other animals? Have you ever wondered what questions we have received and answered over the years? You are not alone. Others have wondered the same thing. We have sorted through ...
Kangaroo Ecology and Biology - Ask A Biologist
Aug 20, 2020 · Red kangaroos are the largest and the males can stand at around 1.8 meters tall (almost 6 feet tall). The western grey kangaroo is the smallest great kangaroo and the adults stand around 1.3 meters (or 4 feet) tall. Kangaroos can also be pretty heavy. An adult male red kangaroo can weigh just over 90 kilograms (about 200 pounds).
today. You may not know it and it's one that's critical, not only for humans but also for all living things on this planet. Like many races, it's a race against time and the growing list of living things becoming extinct. Leading the race is a group of scientists and citizens scientists who are searching our planet to find
Cell Division - Mitosis and Meiosis - Ask A Biologist
Meiosis has two cycles of cell division, conveniently called Meiosis I and Meiosis II. Meiosis I halves the number of chromosomes and is also when crossing over happens. Meiosis II halves the amount of genetic information in each chromosome of each cell. The end result is four daughter cells called haploid cells.
Number of People on Earth | Ask A Biologist
May 11, 2017 · Grade Level. 12. The Earth’s carrying capacity is the number of people the Earth can support without using resources faster than the planet can reproduce them. Experts disagree on this number because carrying capacity depends on a variety of factors including: the type and quantity of available resources, how these resources are distributed ...