What are leaves that are modified structurally to bear sporangia called?
a. megaphylls
b. microphylls
c. sporophylls
d. macrophylls
c. sporophylls
You might also like to view...
Since 2008, grizzly bears (Ursus arctos horribilis) have been spotted farther north than their historic range. As a result, grizzly bear habitat now overlaps polar bear (Ursus maritimus) habitat. The two species of bears, which are capable of mating and producing viable offspring, are considered separate “ecological” species because historically they lived in different habitats and never met. However, in 2006 a hunter shot a wild grizzly-polar bear hybrid known as a grolar bear, the first wild hybrid ever found. This overlap is due to which of the following threats to biodiversity?
a. overharvesting b. habitat loss c. global climate change d. introduction of exotic species
In the garden pea, Mendel found that tall (D) green pods (G) and inflated pods (C) were dominant to
their alleles, dwarf (d) yellow pods (g) and constricted pods (c). Given the following genotypes, determine the chances of producing the offspring shown. (a) DD Gg Cc ? Dd Gg cc ? DD gg Cc (b) DD Gg Cc ? Dd Gg Cc ? tall green pod, constricted pod (c) Dd Gg Cc ? Dd GG cc ? tall green pod, inflated pod (d) Dd Gg Cc ? Dd Gg Cc ? D__ G__ cc (e) Dd Gg Cc ? Dd gg CC ? D__ G__ C__ (f) Dd gg cc ? DD Gg cc ? tall green pod, inflated pod (g) Dd Gg Cc ? Dd Gg Cc ? Dd Gg Cc (h) Dd Gg Cc ? Dd Gg Cc ? dd gg cc What will be an ideal response?
Which classification level contains the greatest number of species?
a. class b. order c. family d. domain e. phylum
The minimal amount of nutrients needed every day by healthy people to prevent nutrient deficiencies is called the
A) RDA, Recommended Dietary Allowance. B) minimum mineral requirements. C) minimum vitamin requirements. D) varied diet of minerals and vitamins.