New technology, such as AUVs, allows scientists to observe marine mammals in which situation?
A) In captivity
B) From the surface of the ocean only.
C) From stranded or dead animals washed up on beaches
D) Underwater in the open sea
D) Underwater in the open sea
You might also like to view...
Water has a high specific heat because of the _____
A) polar covalent bond formed between the oxygen and a hydrogen of a single water molecule B) ionic bonds formed between the hydrogen of one water molecule and the oxygen of another water molecule C) hydrogen bond formed between the hydrogen of one water molecule and the oxygen of another water molecule D) covalent bond formed between the hydrogen of one water molecule and the oxygen of another water molecule
Which of the following is the best example of how we can separate the effects of genes and the environment on the expression of a complex trait?
A. About 80% of an individual's height is determined by genes and 20% by environment. B. For identical twins raised in the same environment, height should not differ by more than 20%. C. In a group of individuals of the same sex, about 80% of the variation in height among individuals is due to genetic differences and 20% is due to environmental differences. D. If one individual is 60 inches tall and another is 70 inches tall, they differ in about 80% of their genes. E. None of these choices accurately illustrate how we can separate the effects of genes and the environment on the expression of a complex trait.
Vascular tissue cells with long, tapered, overlapping ends are known as ____
a. sclerenchyma b. tracheids c. collenchyma d. parenchyma e. vessel elements
In Drosophila melanogaster, vestigial wings are caused by a recessive allele of a gene that is linked to a gene with a recessive allele that causes black body color
Morgan crossed black-bodied, normal-winged females and gray-bodied, vestigial-winged males. The F1 were all gray bodied, normal winged. The F1 females were crossed to homozygous recessive males to produce testcross progeny. Morgan calculated the map distance to be 17 map units. Which of the following is correct about the testcross progeny? A) black-bodied, normal-winged flies = 17% of the total B) black-bodied, normal-winged flies PLUS gray-bodied, vestigial-winged flies = 17% of the total C) gray-bodied, normal-winged flies PLUS black-bodied, vestigial-winged flies = 17% of the total D) black-bodied, vestigial-winged flies = 17% of the total