The stomach’s gastric juice consists of ________.
A) digestive enzymes only
B) hydrochloric acid only
C) digestive enzymes and hydrochloric acid only
D) mucus, digestive enzymes, and hydrochloric acid
What is the key to the recognition of codominance?
A) The phenotype of the heterozygote is intermediate between the phenotypes of the
homozygotes.
B) The trait exhibits a continuous distribution.
C) The alleles affect more than one trait.
D) The heterozygote expresses the phenotype of both homozygotes.
Most domesticated food crops come from which of the following plant groups?
A) mosses
B) gymnosperms
C) ferns
D) angiosperms
In all types of chemoreceptors, receptor cells develop receptor potentials in response to
________.
A) changes in the movement of the surrounding molecules
B) the electrical properties of the surrounding cells
C) chemicals dissolved in a fluid such as blood or saliva
D) the addition of positively charged proteins
Please refer to the following art to answer the following questions.
The hormone being released from the organs shown in the figure is likely to be
________.
A) adrenalin
B) growth
C) testosterone
D) calcitonin
Examine the evolutionary tree below. This tree tells us that the amnion is found in
________.
A) lungfishes and amphibians
B) amphibians only
C) mammals, lizards, and snakes only
D) mammals, lizards, snakes, crocodiles, and birds
Read the following scenario to answer the following questions.
The pineapple, grown for its sweet fruit, is a tropical monocot with a diploid number of
50. It can live for many years. The plant starts as one short stem with tough leaves. The
flowers of the pineapple are located as a cluster at the very top of the stem. After
pollination, the single fruit forms from the fusion of the ovaries of the flowers in the
cluster. The seeds are located just underneath the surface of the fruit. The pineapple
fruit is harvested by cutting at the base of the fruit. After the first fruit is produced, side
shoots grow from the main stem, which can go on to produce additional fruits.
Where would we expect to find cells with 25 unpaired chromosomes in a pineapple
plant?
A) in the leaves
B) in the ovaries prior to pollination
C) in the fruit
D) in the fused ovaries