At the end of which geological time period did the Starfish become extinct?

Q: In which probable stage of physical and chemical evolution of life were gaseous oxygen and water…

A: Earth was formed some 4.6 billion years ago from the sun due to the continuous bombardment of huge…

Q: Which statement about the Cambrian period is true? The first multicellular life appeared. Large land…

A: From the end of the preceding Ediacaran era 541;million years ago(mya) to the beginning of the…

Q: Why did giant dragonflies occur during the Carboniferous, but not now?

A: Fossils show that giant dragonflies and huge cockroaches were common during the Carboniferous…

Q: In what way was the evolution of eukaryotic cells linked to the increase in the oxygen concentration…

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: Which organisms came and went during the Mesozoic era?

A: MESOZOIC ERA:- It is the era when the conifers, reptiles, dinosaurs were present in plenty of…

Q: What does an age structure show?

A: Population ecology is the study of the populations in relation to the environment. It includes…

Q: How did the researchers use the DNA of living sponges to make conclusions about events occurring…

A: Answer- Every organism in a particular species have 99 percent same DNA sequence. Even among…

Q: describe the key adaptation that were associated with the transition from aquatic life to…

A: Adaptation is mechanism by which organism adjust themselves according to the need of environment…

Q: What problems were associated with colonizing land during the evolution of vertebrates?

A: Life on Earth first developed in quite a while over 3.5 billion years prior, and even today most of…

Q: What event is thought to have contributed to the evolution of eukaryotes? a. global warming b.…

A: Eukaryotes can be defined as organisms that comprise of eukaryotic which includes the protists,…

Q: How is fossil age measured

A: Relative dating and absolute dating are the two basic approaches for establishing the age of a…

Q: Which branchpoint represents the most recent common ancestor of A and C? C 2 4 -A -B 3

A: The phylogenetic tree is a diagram and represents the evolutionary relationship between organisms.…

Q: Which group of organisms came before marsupials

A: Marsupials belongs to the mammalia class and metatheria classification and most commonly found in…

Q: Explain how they went extinct.

A: Dinasore became extinct about 65 million years ago at the end of cretaceous Period . mostly…

Q: Which of these steps probably occurred first in the chemical andbiological evolution of life?a. The…

A: All living organisms are made up of organic components like carbohydrates, proteins, lipids, etc.

Q: The map below shows how the continents once were connected together (link to bigger map if you need…

A: Evolution is a step by step and gradual process that took millions of years to attain stability. It…

Q: What does a conical age pyramid with a broad base represents?

A: An age pyramid is a graphical representation  of the number of individuals in various age groups of…

Q: In birds, where have most of the recent extinctions taken place?   a. In outer space   b. At sea…

A: Extinction: It is the term that tells about the disappearance and ending of the species due to their…

Q: B Use the phylogeny to answer the question. Which is the most recent common ancestor of A and D? 1 2…

A: Phylogenetic tree  is a graphical representation of the evolution of organisms.  Here each branch…

Q: To which PHYLUM does the animal in the image below belong? CO

A: The picture above shows ribbonworms. These organisms are also known as proboscis worm or bootlace…

Q: id the transition of vertebrates from water to land happen quickly? Explain

A: The ecological eras are studied concerning evolutionary time. The time taken for the evolution shows…

Q: When was the first mass extinction?

A:

Q: The early atmosphere lacked which gas? 1. carbon dioxide 2. oxygen 3. amonia 4. nitrogen

A: The early atmosphere was likely to contain a lot of carbon dioxide and water vapor because it was…

Q: Which period is known as “Age of amphibians”?

A: Amphibians are the first animal to attempt transition from aquatic to Terrestrial life. From…

Q: Why might fire have been important for the survival of Homo sapiens?

A: The species of human beings have evolved over a course of time. The living modern human species have…

Q: Describe what the early atmosphere was like and what cause a large amount of oxygen (O2) to build up…

A: Early atmosphere  Around 4.6 billion years ago, the Earth was formed from a heated mixture of gases…

Q: Explain if cetaceans evolved through change over time from ancestral mammal that lived on land.

A: Cetaceans are aquatic marine mammals like the species of whales and dolphins. They belong to the…

Q: Cenozoic Era

A: The Cenozoic era began about 66 million years ago and continues into the present, is the third era…

Q: Describe an example from the fossil record that showshow life has changed over time.

A: Evolution is the process of heritable change in the characteristics of an organism. Such changes…

Q: What did the broad base of age pyramid indicates?

A: Age pyramids represent the number of age and sex of a given population. Population is divided into 3…

Q: Homo sapiens appeared in East Africa years ago 300000 O 100000 O 200000 500000 O 400000 O

A: Homo sapiens is the binomial nomenclature for the human species. Homo is the human genus, which also…

Q: Rock strata with fossils Which organism is most recent? a b d a

A: Fossils These are defined as the remains of organisms such as plants, animals, single-celled living…

Q: In what important ways did invertebrate life change between Ordovician time and Devonian time?

A: Evolution is a process of slow and gradual change over a period of time. There are many different…

Q: This tropical area that existed 37-29mya provided was home to many various species, including…

A: The Rukwa Rift Basin is an endorheic rift basin in southwestern Tanzania that includes Lake Rukwa.…

Q: Part 2 Biology Question 2

A: The objective of the question is to identify the most likely genetic configuration of the Pitx1 gene…

Q: Define Cambrian explosion

A: The "Cambrian Explosion" contributes to the abrupt discovery of complex animals with sedimentary…

Q: What are three things a fossil can tell you about an animal?

A: Introduction A fossil is a remnant of a non-living plant or animal that has been preserved or…

Q: In which the greek word systematic derived from latin words in living world?

A: The term living word refers to all the creatures living on this planet that possess life. Every…

Q: According to "The Life and Death of a Neanderthal (Shanidar 1)”, what is the time period being…

A: The correct answer is D. PleistoceneExplanation: Neanderthals:During the Pleistocene era, a unique…

Q: Explain why forams have such a well-preserved fossilrecord.

A: The remains, traces, or impressions of ancient life are called fossils. Their study is known as…

Q: What is the change between the paleolithic era and the neolithic era? What is the Neolithic…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: What's the largest unit of geologic time, lasting hundreds of millions of years? A. Era B. Eon C.…

A: INTRODUCTION Largest unit of geolic time lasting hunderds of millions of year are Eons.

Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.