The earliest cellular life forms appear to have been_____. A. Bacteria B. One-celled plants C. On-celled animals D. Viruses E. Mammals

Q: The cell theory states thata. all living things are composed of cells.b. cells are the smallest…

A: Cells are the structural and functional unit of the living organisms. Group of cells together form…

Q: Which bits of evidence would convince you that life originated as early as 3.2 bya? a. You look at…

A: The change in the heritable characteristics of the species across many generations is called…

Q: "hen scientists set out to test a hypothesis, it is often most practical to try to prove the…

A: If anyone claims that a scientific hypothesis has been confirmed, you should inquire further. They…

Q: Which statement about spontaneous generation is false?   A. It addresses the formation of living…

A: Spontaneous generation is the idea that emphasizes the point that living organisms originate from…

Q: The diagram below represents an organelle. dentify the process that occurs in this organelle, and…

A: An eukaryotic cell comprises distinct structures like a nucleus, cytoplasm with cell organelles, and…

Q: You are examining an organism you believe to be an animal. Which of the following would NOT support…

A:

Q: The three domains of life a. represent variations of the same basic cell type. b. include two…

A: Life forms are classified into mainly 3 domains. They are 1. Archaea 2. Bacteria 3. Eukarya

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: Direct evidence of life on early Earth comes from fossils of microorganisms that lived 3.5 billion…

A: The earliest life structures we are aware of were minuscule organic entities (microorganisms) that…

Q: The first forms of life on Earth were ________. a. plants b. microorganisms c. birds d. dinosaurs

A: Earth  can be defined as the third  planet of the sun and the only astronomical object  that is…

Q: ______move around for at least part of their life. a. Living organisms c. Species b. Animals d.…

A: Step 1 All living things share life processes such as growth, movement, reproduction, sensitivity.…

Q: Protoplasts are plant cells that lack a. nuclei. b. cell walls. c. plasma membranes. d.…

A: Protoplast is greatly used in creating recombinant cells. It is studied under the domain of membrane…

Q: While how the first cells formed is still unknown, scientists suspect that the first active…

A: Biological macromolecules are those molecules that are monomers ( Nucleic acids, lipids,…

Q: Which of the following statements is correct? a) Chloroplasts are only found plants O b)…

A: The following statement is correct.

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: Which of these evolutionary innovations enabled larger cell size? (a) autotrophic mode of nutrition…

A: The cell is the basic structural and functional unit of life. It carries out various functions in…

Q: place the evolutionary steps that led to complex multicellularity in the order in which they thought…

A: Evolution is a directional change which adds modification according to new adaptations over many…

Q: what simple organic molecules were likely the precursors of life? a. water and proteins b. amino…

A: The two important aspects of life are its origin and evolution. The branch of life science, which…

Q: The first single-celled organisms on Earth probably evolved (a) 3,700 years ago (b) 3.7 million years…

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

Q: The cell theory states thata. all life comes from preexisting cells.b. all life is composed of…

A: Step 1 Life of every organism, whether unicellular or multicellular begins as a single cell. The…

Q: As time progressed, inventions and improved. were able to give clearer images of extreme objects.…

A: Given: A paragraph is given with some blanks.

Q: concerning the nucleus of human cells, which of the following is true? a.all human cell have nuclei…

A: Nucleus is a cell organelle present in all eukaryotic cells. It contains the genetic material of a…

Q: Evolution of ________ increased the energy availableto cells, making a larger genome and processes…

A: Introduction Evolution is the process of a species' features changing over numerous generations…

Q: During the Early _______________, life consisted of prokaryotic cells, but by the end of this…

A: The major evolution evens since the origin of the earth have been categorized into three major eras.

Q: BIOLOGY : concepts & current influences Scientific Method 1. A theory is a tested hypothesis. 2.…

A: Please note that abiding by the site regulations and in order to provide accurate and quality…

Q: The Study of Life discusses themes in biology, how life is organized, the types of cellular life…

A: All living organisms, from protozoans to apes, have a few characteristics. Five essential biological…

Q: What if every cell type were like a species within the animal kingdom?

A: Within in an human body there are nearly 200 types of cells. each cell type has its own peculiar…

Q: mini threshold of life's evolution,

A: A threshold is a kind of abrupt elevation in the complication that produces new, resulting in…

Q: Infoldings of the plasma membrane into the cytoplasm ofsome ancestral cells may have evolved into…

A: The correct answer of the given question is d. Infoldings of the plasma membrane into the cytoplasm…

Q: Oceans were a good environment for early organisms because tney O shielded organisms from…

A: According to guidelines we have to answer the first question only so please kindly post the…

Q: Which of the following would have been found in an early prokaryotic cell? a membrane-bound…

A: Introduction Prokaryotic organisms are unicellular organism (e.g. bacteria). They comes under the…

Q: A. What is the PROTEROZOIC LIFE? B. Discuss the Great Oxygenation Event. C. Discuss the CAMBRIAN…

A: Geological time scale is a evolutionary event  which determines how the life appear , its…

Q: Describe some characteristics and differences between prokaryotic and eukaryotic cells.

A: DISCLAIMER Since you have asked multiple questions, we will solve the first question for you. If you…

Q: Scientists think that terrestrial life probably originated in Earth's oceans because Choose one:…

A: Question - Scientists think that terrestrial life probably originated in Earth's oceans because…

Q: The simple animals such as planaria can be cut into number of pieces and each piece grows into a…

A: Organism reproduces by both sexual and asexual means.

Q: When was the cell theory developed? a. early 1600s b. mid-1600s c. mid-1700s d. mid-1800s

A: Cell theory- Scientists once believed that life evolved spontaneously from nonliving matter. Life…

Q: Which of these provides evidence of the common ancestry of all life? A) the ubiquitous use of…

A: One of the strongest evidences for common descent and ancestry comes from gene sequences.

Q: where on the earth did life mostly likely first emerge, where all the ingredients and conditions for…

A: There is an evidence that life began as early as 4.5 billion years ago , and had been reported in a…

Q: The first forms of life on Earth were a. plants b. microorganisms c. birds d. dinosaurs

A: According to research on fossils, life first appeared on earth 3.5 billion years ago, making it 4.5…

Q: The oxygen revolution changed Earth’s environmentdramatically. Which of the following took advantage…

A: The earth is approximately 4.54 billion years ago and the conditions at that time were not meant for…

Q: The evolution of eukaryotes was most directly enabled by which of the following? a. Diversification…

A: According to guidelines we have to answer the first question only. so please kindly post the…

Q: Scientists hypothesize that very simple cells could have arisen through four steps. Place thos 4…

A: Evolution is defined as the change in characteristics of individual over a period of time. All…

Q: A. What do scientists think the primitive Earth was like? Give 3 evidences.   B. How could life…

A: Our current atmosphere of twenty one percent oxygen would make the emergence of DNA & other…

Q: Which of the following statements is false? a. All multicelled organisms have cell walls. b. All…

A: The organisms in the world can be classified based on the properties of cells. This basic…

Q: Often, medical researchers use cancer cell lines to study a range of biological processes. Why do…

A: Cancer cells are abnormal cells which have lost the regulation mechanism. In short it can be seen…

Animal Diversity

Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.

Platyhelminthes

Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.