Which of the following occurs

while homologous chromosomes

are paired up?

A. They create 2 haploid cells.

B. They contain 6 chromatids.

C. They exchange portions of their DNA.

D. They produce two diploid cells.

Which of the followings is a carbohydrate Atp wax sucrose steroid

Which types of fossil fuels could / should we use less? Why?

Suppose that in plants, smooth seeds (S) are dominant to wrinkle seeds (s) and tall plants (T) are dominant to short plants (t). A tall plant with smooth seeds was backcrossed to a parent that was short and wrinkle.

Which statements accurately compare the environmental impact of surface mining to the environmental impact of underground mining? Select the two correct answers. Underground mining causes more issues with dust and particulates than surface mining.

Explain why fewer plants are at the bottom of deep lakes

Which of the following do fish NOT use to breathe? A. air bladder B. pharyngeal slits C. pores on their back D. olfactory bulbs

Imagine a protein that has been engineered to contain a nuclear localization signal, a nuclear export signal, a C-terminal peroxisomal targeting sequence, and a canonical endoplasmic reticulum (ER) signal sequence.

Which organelle receives protein from endoplasmic reticulum and sorts and packages it for delivery outside cell?

Eukaryotic cells have many different specialized structures that are involved in making, organizing, and delivering a protein molecule. Describe the four organelles that are involved and the sequence of events of this process.

What do scientists call an orderly pattern of change over time? A. homeostasis B. ecological succession C. food web D. an ecosystem