What was the difference between the gametes produced without crossing over and the ones produced with crossing over

What animal has spiny armor that protects it from predators and cushions its falls from trees?

Which is an example of an ecosystem? A. one northern cardinal B. one group of yellow-bellied cuckoos C. groups of ruby-throated hummingbirds, white oak trees, and brown-headed cowbirds D.

How are tumor cells different then normal cells? A) tumor cells have a cell wall instead of a membrane. B) mitosis does not happen in tumor cells. C) tumor cells do not contain chromosomes. D) cell division is not regulated to tumor cells.

Which if the following is the definition for speciation

What are some nonliving thing in the forest?

Which of the following accurately describes the binomial nomenclature naming system? A. The second word indicates the organism's genus classification. B. The second word is always capitalized. C. The first word is always lowercase. D.

Why do children in comparison with adults represent a group that is especially vulnerable to environmental hazards? choose the incorrect answer. a. they may be exposed more often to toxins in the outdoor air. b. they spend more time indoors. c.

What system is made up of the nose, pharynx, trachea, lungs, bronchi, and alveoli. circulatory endocrine immune respiratory

Bleeding from the nose (epistaxis) is usually a harmless phenomenon, but may appear in the form of stronger bleeding that threaten life.

Suppose you plant a seed and observe that a tree of large mass grows from it. The tree achieves a final mass that changes very little for years afterward. Which of the following is true about the tree? A.