Why is it necessary for animals to have a circulatory system?

O to move blood

O to breathe

O to maintain homeostasis

O to exchange materials with its environment

A construction worker is using his weight to keep a stationary stack of wooden beams from falling. If the construction worker uses 689.0 N of force to hold 10 beams stationary against a wall, how much work does he do?

An increased quantity of communication promotes more harmony and understanding Group of answer choices True False

What do biotechnology professionals do

Which is a valid statement about rock formation? A. igneous rocks all formed under circumstances that no longer occur on earth B. sedimentary rocks form today the same way that they formed in the past C.

Based on your research from question 2, develop an if-then hypothesis relating to the effect of pollution on yeast respiration.

1pt Blood is made up of A. nutrients, minerals, fats, and proteins B. oxygen, carbon dioxide, and sugar C. plasma, red blood cells, white blood cells, and platelets D. bone marrow cells and water

One of the first breakthroughs in biotechnology was the discovery of the gene that makes insulin. Part of this process involved scientists making DNA to match each possible sequence of insulin mRNA. What was the next step of this process? A.

Which of these modes of transmission require a bodily opening either natural or artificial?

Which factor is a characteristic of an acid? A. Non-corrosive B. Soapy C. Sour D. Slippery

How are unique daughter cells created in meiosis? A. Homologous pairing B. Crossing over C. Mutation during reduction Division D. Zygote fertilization