The organs are known as Vestigial organs. The evolution from land-dwelling animal to the marine animals has led whales as well as dolphins, to lose hind limbs. The pelvic and leg bone serves no purpose in them and just provide the anchorage to muscles
Answer: Option B) have mitochondria and chloroplasts.
Plant cells have mitochondria and chloroplasts.
Explanation:
Unlike animal cells, plants cells possess mitochondria and chloroplasts. Mitochondria serves as site for respiration giving off oxygen as by-product while chloroplasts are site of photosynthesis, where sugar molecules are formed from simple inorganic molecules like atmospheric carbon dioxide, water and sunlight trapped by chlorophyll.
Product A with 300 calories and 19 grams of protein
Answer:
a. Her mother has zig-zag antennae.
b. Her brother has zig-zag antennae.
Explanation:
<u>Available data</u>:
- Antennae development ⇒ controlled by maternal effect
- Zig-zag coils are dominant
- Curly coils are recessive
- A female develops zig-zag coils
Maternal effect: Refers to the influence of the “environment provided by the mother” on the progeny phenotype. The mother´s genotype directly determines the progeny phenotype. Even though the progeny has a different genotype, it is irrelevant, as well as the father´s genotype or phenotype. This means that no matter what is the genotype of the offspring, all of them will express the same phenotype as their mother. The maternal effect is commonly seen in insects and might be seen in some mammals and plants.
So, if a female has zig-zag coils, this means that the mother also has zig-zag antennae and that all the brothers and sisters of this female ant have zig-zag antennae, independently of their genotype.
a. Her mother has zig-zag antennae ⇒ True. The trait is inherited from the mother.
b. Her brother has zig-zag antennae ⇒ True. The whole progeny will express sig-zag antennae.
c. This female carries the zig-zag allele ⇒ Not necessarily.
d. This female's offspring will have zig-zag antennae ⇒ Depends on it´s genotype
There are 4 main reasons, which we discuss in detail below:
Reduced tolerance for light
Greater sunlight sensitivity between attacks
Longer duration of sun exposure
Exposure to specific wavelengths emitted by sun
People prone to light-induced migraine episodes generally have a lower threshold for light. In fact, the light of an overcast and cloudy day can be enough to cause pain! Thus, even normal levels of light exposure—much less bright days—can lead to headaches and other migraine symptoms.
The tolerance for light can also be lower between attacks making people more sensitive even when they are not in pain. This means a person may not immediately have a headache while outside, but it may be building. And if you just came out of an attack, you may find that your symptoms linger as a result of sun exposure.
If you don’t have an immediate headache or migraine from the sun, experts have further suggested that the cumulative effect of sunlight exposure over time can be just as damaging. Ultimately, the longer you stay outside, the more likely you may develop a headache.
Lastly, the sun emits a spectrum of light wavelengths, one of the strongest of these being high energy visible light or what most people label blue light. In fact, blue light is everywhere—fluorescents, device screens, and other artificial sources as well. And blue light has been repeatedly identified as the most painful color of light for people with migraine. thus the combined effect of sun brightness and these painful wavelengths can be a dynamic duo of unpleasantness.
