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ziro4ka [17]
3 years ago
11

How had/has human activity influenced the tropic cascade of the aleutian islands kelp forest

Biology
1 answer:
Rina8888 [55]3 years ago
7 0

Answer:

humans killing whales caused orcas to have to eat otters which caused sea urchin populations to increase which caused kelp populations to decrease

Explanation:

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What is the complementary dna strand to ATCGGTACA
yan [13]
The complementary DNA strand would be TAGCCATGT.
4 0
3 years ago
Which of the following is an example of polygenic (quantitative) inheritance? a. the ABO blood groups b. Huntington's disease
ra1l [238]

Answer:Human height

Explanation:

Inheritance patterns are often more complex than predicted by simple mendalian genetics. When Mendel studied some phenotypic characters, like the human skin color and height, they were found to be an addictive effect of two or more genes on a single phenotypic character. These are called quantitative characters, which usually indicates polygenic inheritance.

The human height is an example of quantitative character, it is controlled by at least 3 genes having 6 alleles. 3 genes with 6 alleles from both parent can give rise to wide range of phenotypic character (heights).

5 0
3 years ago
Read 2 more answers
The inheritance of eye color in Drosophila is controlled by genes on each of the fly's four chromosome pairs. One eye-color gene
algol [13]

Answer:

F1 Females  - all wild type

F1 Males  - all wild type

F2 Females  -  - all wild type

F2 Males - 1/2 wild type, 1/2 vermilion

Explanation:

The wild-type allele (Xᵛ⁺) is dominant over vermilion (Xᵛ), which is a sex-linked trait.

Female flies have two X chromosomes, male flies have one X and one Y chromosome.

A homozygous wild-type female fly (Xᵛ⁺Xᵛ⁺) is mated with a vermilion male fly (XᵛY).

The female parent can only produce Xᵛ⁺ gametes.

The male parent can produce either Xᵛ or Y gametes.

When gametes from both parents fuse, the F1 offspring will have the genotypes Xᵛ⁺Xᵛ (females with wild type eyes) and Xᵛ⁺Y (males with wild type eyes).

The F1 females can produce Xᵛ⁺ and Xᵛ gametes. The F1 males can produce Xᵛ⁺ and Y gametes.

When the F1 individuals interbreed, the gametes combine to give rise to the F2 offspring. The possible combination of gametes that will give the different genotypes and phenotypes in the F2 are:

  • Xᵛ⁺Xᵛ⁺ females with wild type eyes
  • Xᵛ⁺ Y males with wild type eyes
  • Xᵛ Xᵛ⁺ females with wild type eyes
  • Xᵛ Y males with vermilion eyes

7 0
3 years ago
How are the bryophytes and seedless vascular plants alike? how are the bryophytes and seedless vascular plants alike? plants in
Dahasolnce [82]
I believe in both groups , the sperm swim from antheridia to aronia. Both are tied to water by swimming sperm that require water to reach eggs. Neither of them has pollen, seeds, flowers, or fruits. Seedless vascular plants, however, have xylem and phloem, which bryophytes lack. For seedless vascular plants Cells in diploid sporophyte such as fern from undergo meiosis, releasing haploid spores that germinate and develop into gametophytes. Bryophytes reproduce sexually by forming sperm and egg cells within separate haploid male and female gametophytes.
3 0
4 years ago
Which carbon compounds are formed over the course of the Calvin cycle? In what form of sugar to cells
Airida [17]

Answer:

xyxxuxuuxcu

Explanation:

xyyxyxxy

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