Fill in the blanks.
The period lasts from conception to implantation of the zygote in the lining of the uterus. During this time, the organism begins cell division and growth.
The first trimester is a critical stage in human development because nutrient deficiencies.
Throughout the prenatal period, the embryo/fetus depends entirely on its .
A very preterm infant who is born after about 26 weeks of pregnancy may .

The blanks are as germinal, such as lack of folate ,  mother, be underdeveloped in this order

Explanation:

The blanks are just the excerpt of the passage from the book and are just identified as blanks.

Germinal is the initial stage of prenatal development.

The nutrient deficiencies include lack of the folate.

During the complete duration of the prenatal period, the fetus is dependent on the mother.

The very preterm infant may be underdeveloped.

answer: a. a gene that causes a specific trait.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!