Which is the first line of defense against the invasion of pathogens?

a. subcutaneous tissue

b. skin

c. adipose tissue

d. melanocytes e. nail body

Which of the following is an organic molecule? A. NaCi B. FeO C. CH4 D. H2O

When a helium balloon expands and the volume doubles what happens to the density of the helium inside it?

What is evolution? brainliest

What are sex-link traits?

A certain disease kills ribosomes in cells, what function would be most directly affected?

Risk assessment depends on

DNA is genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes.

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white

The green stem ant has three (autosome) chromosomes. During meiosis, chromosome 1 and 3 separate normally, but chromosome 2 homologs do not separate during meiosis I. Meiosis II happens normally. What will the resulting cells of meiosis look like?

A population is growing at a rate of 2,4,8, 16, 32. Which type of growth does this describe?