Out of the following given choices;
A. theory that fish and mammals have a common ancestry
B. theory that the first organisms on Earth were heterotrophs
C. close relationship between fish and mammalian reproductive patterns
D. close relationship between humans and annelids
The answer is A. Many embryos of the kingdom Animalia share similarities in the early stages depicting that they share a common ancestor. The gill slits is one example. They diverge in later stages to become Pharyngeal in the human embryo, while they differentiate into gills in fish.
Answer:
Eukaryotic cells are cells that contain a nucleus and organelles, and are enclosed by a plasma membrane. Organisms that have eukaryotic cells include protozoa, fungi, plants and animals.
(google)
A prokaryotic cell is a simple, single-celled (unicellular) organism that lacks a nucleus, or any other membrane-bound organelle. We will shortly come to see that this is significantly different in eukaryotes. Prokaryotic DNA is found in the central part of the cell: a darkened region called the nucleoid (Figure 1).
(google)
Explanation:
A platelets aren't formed until vessel damages occurs <span />
A fruit...............................
Answer:
lvl 2 - Molecules consist of atoms
lvl 3 - Cells consist of molecules
lvl 4 - Organisms consist of cells
lvl 5 - Populations consist of organisms
lvl 6 - Communities consist of populations
lvl 7 - Ecosystems consist of communities interacting with their environment
lvl 8 - The biosphere consists of all ecosystems on Earth
Explanation:
