Answer:
Scientists first discovered chromosomes in the nineteenth century, when they were gazing at cells through light microscopes. But how did they figure out what chromosomes do? And how did they link chromosomes — and the specific genes within them — to the concept of inheritance? After a long period of observational studies through microscopes, several experiments with fruit flies provided the first evidence.
Explanation:
Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes. Every normal human cell contains 23 pairs of chromosomes, for a total of 46 chromosomes. A trait is any gene-determined characteristic and is often determined by more than one gene.
The tricuspid valve is the valve that is located between the right atrium and the right ventricle but it does not direct blood to the lungs, it stops blood from flowing back into the right atrium. The pulmonary valve does in a way push the blood to the lungs, but it is located between the right ventricle and the pulmonary artery, not the right atrium and right ventricle.
The binomial nomenclature system combines two names into one to give all species unique scientific names. The first part of a scientific name is called the genus. The second part of a species name is the specific epithet. Species are also organized into higher levels of classification.
Answer:
C. cell- tissue- organ- organ- system
Answer:
Water vascular system = Echinodermata
Tentacles with stinging cells= Cnidaria
Molting for growth= Arthropoda
Presence of mantle= Molluska
Explanation:
