WILL GIVE BRAINLIEST. Which description is true regarding fossils and phylogenetic trees of species that have lived on Earth?

A. Some species are extinct. Phylogenetic trees occasionally involve traits of extinct species whose traits require the study of fossils. , Some species are extinct. Phylogenetic trees occasionally involve traits of extinct species whose traits require the study of fossils. , ,

B. Most species are extinct. To classify an extinct organism on a phylogenetic tree, the study of fossils is often required to determine the traits of extinct species.

C. A few species are extinct. The fossils of these extinct species can be used to create phylogenetic trees. , A few species are extinct. The fossils of these extinct species can be used to create phylogenetic trees. , ,

D. No species are extinct. Therefore, fossils are not needed to create phylogenetic trees.

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.

What is the difference between how ionic and covalent bonds form