Answer:
El árbol de la vida o árbol universal de la vida es una metáfora, modelo y herramienta de investigación que se utiliza para explorar la evolución de la vida y describir las relaciones entre organismos, tanto vivos como extintos, como se describe en un famoso pasaje de El origen de las especies (1859) de Charles Darwin.2
Explanation:
Answer:
The water vascular system of echinoderms (B) functions in locomotion and feeding.
Which of the following combinations of phylum and description is correct? (C) Platyhelminthes—flatworms, gastrovascular cavity, no body cavity
Explanation:
Echinoderms are marine animals. They have a water vascular system that make them able to move (locomation), respiration and food and waste transportation. This system is full of different canal along the body.
Echinodermata has not a radial symmetry as a larva, in fact it has a bilateral symmetry and coelom present. When it comes to Nematoda, they are roundworms and have a pseudocoelomate. Finally, porifera has a gastrovascular cavity and no coelom.
<span>As
I know Gregor Mendel - Austrian naturalist, botanist and a religious leader, a
monk, founder of the doctrine of heredity (Mendelism). By applying statistical
methods for the analysis of results of the hybridization of pea varieties,
formulated the laws of heredity. In 1856, Mendel began his experiments in
crossing different varieties of peas, differing in a single, strictly defined
criteria (for example, the shape and color of seeds). Precise quantitative
account of all types of hybrids and statistical processing of the results of
experiments that he conducted for 10 years, allowed him to formulate the basic
laws of heredity - the splitting and combining of hereditary
"factors". Mendel showed that these factors are separated and not
crossing merge and disappear. Although the crossing of two organisms with
contrasting features (for example, yellow or green seeds) in the next
generation of hybrids appears only one of them.</span>
