Which of the following events occurs during the first trimester of pregnancy?
A. The heart begins to form.
B. The lungs fully mature.
C. The fetus grows to 1 foot in length.
D. The fetus has a very rapid phase of growth.
E. All of these events occur during the first trimester.
A. The heart begins to form.
You might also like to view...
A signaling molecule that interacts with
phytochrome to influence flowering is produced in a. roots. b. leaves. c. the stem. d. flowers. e. petioles.
Adjuvant therapy combines ____
a. surgery and MRI imaging b. high dose chemotherapy and X-rays c. radiation and high dose chemotherapy d. surgery and low dose chemotherapy e. surgery and radiation therapy
The comparison between the number of human genes and those of other animal species has led to many conclusions, including that _____
A) the density of the human genome is far higher than in most other animals B) the number of proteins expressed by the human genome is far more than the number of its genes C) most human DNA consists of genes for protein, tRNA, rRNA, and miRNA D) the genomes of most other organisms are significantly smaller than the human genome
Choose the true statement about the morphological data in the chart shown below. The "1" in the box means the trait is present and the "0" indicates that the trait is absent.(Note: All of the characteristics across the top of the columns are considered "TRAITS" for purposes of reading the chart.). TRAITS ORGANISMJawsLungsAmniotic MembraneHairNo TailBipedalLamprey000000Shark100000Salamander110000Lizard111000Tiger111100Gorilla111110Human111111
A. The lamprey is the only outgroup since it has none of the derived characteristics. B. Only the gorilla and humans share all of the derived characteristics. C. The shark is the outgroup since it only has one of the derived characteristics (jaws). D. All organisms in this chart share all of the derived characteristics. E. The salamander and the tiger together are the outgroup because they only share two of the derived characteristics (jaws and lungs).