Answer:
A. Yes, because molecules move down the
concentration gradient without using energy.
Explanation:
Active transport is the energy-requiring process of pumping molecules and ions across membranes against a concentration gradient. Both endocytosis and exocytosis are active transport processes.
Hope that helps!
The statement that the integument is strictly composed of the skin and It does not include the various accessory structures that may be present on or beneath the skin layers is False.
<h3>Composition of integument</h3>
- Together with the underlying epidermal cells that secrete the cuticle, the cuticle and integument make up the skin.
- The cuticle functions as the insect's exoskeleton, the location of muscle attachment, and the first line of protection against fungi, bacteria, predators, parasites, and environmental toxins, including pesticides.
- The integument plays a role in behavior, osmoregulation, water control, eating, excretion, desiccation resistance, and as a food reserve.
- The complexity of the structure and chemistry of an insect's integument as well as the unique ways in which it has been modified to work within its owner's environment serve as some indicators of the variety of roles that these coverings play.
To learn more about the Skin layers refer to:
brainly.com/question/12057617
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Answer:
a prezygotic barrier
Explanation:
Both wild tigers and lions are said to be reproductively isolated.
Reproductive isolation is defined as the existence of barrier between organisms of different species such that they cannot reproduce.
The mechanisms of reproductive isolation varies. While some act to prevent the formation of zygotes (in case of mating) between organisms of different species, some ensures that the resulting zygotes are invalid.
Reproductive isolation mechanisms that act to prevent fertilization and formation of zygotes are referred to as prezygotic mechanisms while those that ensure that invalid zygotes result (in case of successful fertilization) are referred to post zygotic mechanisms.
<em>The natural differences in the ranges of wild tigers and lions ensure that both animals do not mate with each other, let alone results in zygote. This is a form of pre-zygotic reproductive isolation mechanism.</em>
Answer:
The active ingredients in many pesticides are chemical compounds that kill organisms such as insects, molds, and weeds. Proponents claim that the use of pesticides improves crop yields and thus protects land and soil by reducing the conversion of forests and wetlands to cropland.
Explanation:
Answer:
1. c
2. d
3. a
4.b
Explanation:
I numbered the first four boxes a, b, c, and d, and the slots where they go in 1, 2, 3, and 4 going down.
