as a tree ages it needs to keep making more xylem and phloem cells to carry water and food how does this occur

When analyzing tree rings, what do scientists assume a thin ring indicates?

Which section of a lab write-up describes steps completed during the investigation? A. Procedure B. Data analysis C. Conclusions

Clonal selection identifies a __ lymphocyte that needs to be cloned for production of a specific antibody.

Which best describes cost-effectiveness? maintaining the lowest expenses for making a product charging the lowest prices when selling a product ordering the smallest quantity of materials when making a product using the smallest amount of time to

A resident is five feet tall. what is the measurements in iches

What is the most important genetic factor influencing whether someone will develop osteoporosis? A. Age B. Exercise C. Gender D. Diet

What is one difference between a cell wall and a cell membrane? a. cell walls do not connect cell to cell. Cell membranes connect cell to cell b. only plant cells have cell walls. Only animal cells have cell membranes. c.

When cells divide during meiosis homologous chromosomes are randomly distributed to daughter cells and different chromosomes segregate what of each other?

What do all wetlands have in common? A. They lack life-forms. B. They are highly polluted. C. They are swamps. D. They recycle nutrients into the soil.

Lysis of adhesions is performed on either the fallopian tubes or the: answer vagina uterus ovaries vulva