A Cuticle, because a cuticle is waxy and it repels water and covers outside of a plant. Unlike a seed, phloem, ad xylem. If you think about your nails wouldn't you think cuticle as well?
<span>We know that fetuses can hear before birth because newborns are able have a preference for sounds they were subjected to while still in the womb. For example, a newborn would likely be able to preference the sound of their mother's voice than the voice of a stranger.</span>
Complete question:
Snow leopards live in the high reaches of the Himalayas and have several adaptations to deal with living most of the time in snow. They have wide paws with hair between the toes to allow them to run on top of the snow crust. Assume that wide paws (W) and hair between the toes (T) are both dominant traits and are on the same chromosome. Suppose that two snow leopards, heterozygous for both traits, mate. Suppose further that in the female, the two dominant alleles are on the same chromosome of the homologous pair, while in the male, each chromosome of the pair has one dominant and one recessive allele.
1) What percentage of each of the following genotypes will be produced?
- WwTT:
- WwTt:
- Wwtt:
- wwTT:
- wwTt:
- wwtt
2) How many of the offspring (assume 4 cubs) will have narrow paws with hair between the toes?
Answer:
1) Percentage of each of the following genotypes
- WWTT: 0
- WWTt: 1/4 = 25%
- WWtt: 0
- WwTT: 1/4 = 25%
- WwTt: 0
- Wwtt: 1/4 = 25%
- wwTT: 0
- wwTt:1/4 = 25%
- wwtt: 0
2) Offspring with narrow pows: 1 of four individuals.
Explanation:
<u>Available data:</u>
- wide paws (W) and hair between the toes (T) are both dominant traits
- narrow paws (ww) and no hair (tt) are bothe recessive traits
- Both traits are on the same chromosome.
- Female: W and T on the same chromosome of the homologous pair, w and t on the other chromosome.
- Male: W and t on the same chromosome of the homologous pair, w and T on the other chromosome.
Cross: Between two heterozygous individuals
Parental) WwTt x WwTt
Sex) Female Male
Gametes) WT wt Wt wT
Punnett square)
WT wt
Wt WWTt Wwtt
wT WwTT wwTt
F1) Genotypes:
Phenotypes:
- 2/4 = 1/2 = 50% wide paws with hair (W-T-)
- 1/4 = 25% wide paws with no hair (W-tt)
- 1/4 = 25% narrow paws with hair (wwT-)
Answer: All fingers, toes, feet, and palms are covered in small ridges. These are raised portions of the skin, arranged in connected units called dermal, or friction, ridges. They help us with our grip on objects that we touch. When these ridges press against things, they leave a mark, an impression called a fingerprint.
Explanation:
I think Autorhythmic fibers are fibers that are self excitable or on their own for example some cardiac muscle. They repeatedly generate action potentials that trigger heart contractions.They continue to stimulate a heart to beat even when it is removed from the body. In comparison to contractile fibers, autorhythmic fibers are self excitable and do not require nervous system stimulation to trigger contractions. Contractile fibers have stable resting membrane potentials of -90mV, when a contractile fibers reaches threshold by action potential, the voltage gated fast sodium ions channels will open.
